Hi,

using latest 3.2.7 server/proxy in passive mode. From the server GUI I´ve noticed that the time the proxy was last seen increases > 30min and counting. The device graphs being monitored by the proxy show gaps

From the server I can telnet the proxy port 10051 successfully. I´ve setup a network trace and I can see the communication from server/proxy still active:

[root@sinnvmonpapc05 ~]# tcpdump -i bond0 -n host zabbix-server-IP
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on bond0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:15:56.551268 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 4030647264, win 1405, options [nop,nop,TS val 1172926149 ecr 510986322,nop,nop,sack 1

{2897:4345}

], length 0
10:15:56.551308 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 4345:5793, ack 0, win 114, options [nop,nop,TS val 510987072 ecr 1172926149], length 1448
10:15:56.792100 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 1:1449, ack 0, win 114, options [nop,nop,TS val 510987313 ecr 1172926149], length 1448
10:15:56.926544 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 1, win 1419, options [nop,nop,TS val 1172926524 ecr 510986322,nop,nop,sack 1

{2897:5793}

], length 0
10:15:58.024106 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 1:1449, ack 0, win 114, options [nop,nop,TS val 510988545 ecr 1172926524], length 1448
10:15:58.398389 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 1449, win 1419, options [nop,nop,TS val 1172927996 ecr 510988545,nop,nop,sack 1

{2897:5793}

], length 0
10:15:58.398428 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 5793:7241, ack 0, win 114, options [nop,nop,TS val 510988919 ecr 1172927996], length 1448
10:15:58.398440 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 7241:8689, ack 0, win 114, options [nop,nop,TS val 510988919 ecr 1172927996], length 1448
10:15:58.773102 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 1449, win 1419, options [nop,nop,TS val 1172928371 ecr 510988545,nop,nop,sack 1

{2897:7241}

], length 0
10:15:58.773140 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 1449:2897, ack 0, win 114, options [nop,nop,TS val 510989294 ecr 1172928371], length 1448
10:15:58.773153 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 7241:8689, ack 0, win 114, options [nop,nop,TS val 510989294 ecr 1172928371], length 1448
10:15:58.773160 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 8689:10137, ack 0, win 114, options [nop,nop,TS val 510989294 ecr 1172928371], length 1448
10:15:58.773221 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 1449, win 1419, options [nop,nop,TS val 1172928371 ecr 510988545,nop,nop,sack 1

{2897:8689}

], length 0
10:15:58.773239 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 10137:11585, ack 0, win 114, options [nop,nop,TS val 510989294 ecr 1172928371], length 1448
10:15:59.147458 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8689, win 1404, options [nop,nop,TS val 1172928745 ecr 510989294], length 0
10:15:59.147497 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 11585:13033, ack 0, win 114, options [nop,nop,TS val 510989668 ecr 1172928745], length 1448
10:15:59.147512 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8689, win 1404, options [nop,nop,TS val 1172928745 ecr 510989294,nop,nop,sack 1

{7241:8689}

], length 0
10:15:59.147887 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 10137, win 1424, options [nop,nop,TS val 1172928746 ecr 510989294], length 0
10:15:59.147927 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 13033:14481, ack 0, win 114, options [nop,nop,TS val 510989668 ecr 1172928746], length 1448
10:15:59.148291 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11585, win 1424, options [nop,nop,TS val 1172928746 ecr 510989294], length 0
10:15:59.148342 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 14481:15929, ack 0, win 114, options [nop,nop,TS val 510989669 ecr 1172928746], length 1448
10:15:59.523154 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11585, win 1424, options [nop,nop,TS val 1172929121 ecr 510989294,nop,nop,sack 1

{13033:14481}

], length 0
10:15:59.523177 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11585, win 1424, options [nop,nop,TS val 1172929121 ecr 510989294,nop,nop,sack 1

{13033:15929}

], length 0
10:15:59.523305 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 15929:17377, ack 0, win 114, options [nop,nop,TS val 510990044 ecr 1172929121], length 1448
10:15:59.523330 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 17377:18825, ack 0, win 114, options [nop,nop,TS val 510990044 ecr 1172929121], length 1448
10:15:59.754081 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 11585:13033, ack 0, win 114, options [nop,nop,TS val 510990275 ecr 1172929121], length 1448
10:15:59.899840 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11585, win 1424, options [nop,nop,TS val 1172929498 ecr 510989294,nop,nop,sack 1

{13033:17377}

], length 0
10:15:59.899866 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11585, win 1424, options [nop,nop,TS val 1172929498 ecr 510989294,nop,nop,sack 1

{13033:18825}

], length 0
10:16:00.128388 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 18825, win 1404, options [nop,nop,TS val 1172929726 ecr 510990275], length 0
10:16:00.128443 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 18825:21721, ack 0, win 114, options [nop,nop,TS val 510990649 ecr 1172929726], length 2896
10:16:00.504186 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 20273, win 1424, options [nop,nop,TS val 1172930101 ecr 510990649], length 0
10:16:00.504284 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 21721:24617, ack 0, win 114, options [nop,nop,TS val 510991025 ecr 1172930101], length 2896
10:16:00.504659 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 21721, win 1424, options [nop,nop,TS val 1172930102 ecr 510990649], length 0
10:16:00.504706 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 24617:26065, ack 0, win 114, options [nop,nop,TS val 510991025 ecr 1172930102], length 1448
10:16:00.881711 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 23169, win 1424, options [nop,nop,TS val 1172930479 ecr 510991025], length 0
10:16:00.881805 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 26065:27513, ack 0, win 114, options [nop,nop,TS val 510991402 ecr 1172930479], length 1448
10:16:00.882175 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 23169, win 1424, options [nop,nop,TS val 1172930480 ecr 510991025,nop,nop,sack 1

{24617:26065}

], length 0
10:16:00.882222 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 27513:28961, ack 0, win 114, options [nop,nop,TS val 510991403 ecr 1172930480], length 1448
10:16:01.258460 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 23169, win 1424, options [nop,nop,TS val 1172930856 ecr 510991025,nop,nop,sack 1

{24617:27513}

], length 0
10:16:01.258490 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 23169, win 1424, options [nop,nop,TS val 1172930856 ecr 510991025,nop,nop,sack 1

{24617:28961}

], length 0
10:16:01.258522 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 23169:24617, ack 0, win 114, options [nop,nop,TS val 510991779 ecr 1172930856], length 1448
10:16:01.258540 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 28961:30409, ack 0, win 114, options [nop,nop,TS val 510991779 ecr 1172930856], length 1448
10:16:01.634551 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 23169, win 1424, options [nop,nop,TS val 1172931232 ecr 510991025,nop,nop,sack 1

{24617:30409}

], length 0
10:16:01.634574 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 30409, win 1404, options [nop,nop,TS val 1172931232 ecr 510991779], length 0
10:16:01.634672 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 23169:24617, ack 0, win 114, options [nop,nop,TS val 510992155 ecr 1172931232], length 1448
10:16:01.634697 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 30409:31857, ack 0, win 114, options [nop,nop,TS val 510992155 ecr 1172931232], length 1448
10:16:01.634714 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 31857:33068, ack 0, win 114, options [nop,nop,TS val 510992155 ecr 1172931232], length 1211
10:16:02.009972 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 30409, win 1424, options [nop,nop,TS val 1172931608 ecr 510991779,nop,nop,sack 1

{23169:24617}

], length 0
10:16:02.009997 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 30409, win 1424, options [nop,nop,TS val 1172931608 ecr 510991779,nop,nop,sack 1

{31857:33068}

], length 0
10:16:02.220092 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [.], seq 30409:31857, ack 0, win 114, options [nop,nop,TS val 510992741 ecr 1172931608], length 1448
10:16:02.594297 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 33068, win 1424, options [nop,nop,TS val 1172932192 ecr 510992741], length 0
10:16:02.594478 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [P.], seq 0:85, ack 33068, win 1424, options [nop,nop,TS val 1172932192 ecr 510992741], length 85
10:16:02.594807 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [FP.], seq 85:138, ack 33068, win 1424, options [nop,nop,TS val 1172932193 ecr 510992741], length 53
10:16:02.622436 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [P.], seq 33068:33121, ack 139, win 114, options [nop,nop,TS val 510993143 ecr 1172932192], length 53
10:16:02.622490 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [F.], seq 33121, ack 139, win 114, options [nop,nop,TS val 510993143 ecr 1172932192], length 0
10:16:02.622507 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.60848: Flags [R.], seq 33122, ack 139, win 114, options [nop,nop,TS val 510993143 ecr 1172932192], length 0
10:16:02.642274 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [S], seq 2989665615, win 29200, options [mss 1460,sackOK,TS val 1172932240 ecr 0,nop,wscale 7], length 0
10:16:02.642318 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [S.], seq 937517594, ack 2989665616, win 14480, options [mss 1460,sackOK,TS val 510993163 ecr 1172932240,nop,wscale 7], length 0
10:16:02.996130 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [R], seq 2675404242, win 0, length 0
10:16:02.996148 IP zabbix-server-IP.60848 > zabbix-proxy-IP.zabbix-trapper: Flags [R], seq 2675404242, win 0, length 0
10:16:03.642100 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [S.], seq 937517594, ack 2989665616, win 14480, options [mss 1460,sackOK,TS val 510994163 ecr 1172932240,nop,wscale 7], length 0
10:16:03.643693 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [S], seq 2989665615, win 29200, options [mss 1460,sackOK,TS val 1172933242 ecr 0,nop,wscale 7], length 0
10:16:03.643724 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [S.], seq 937517594, ack 2989665616, win 14480, options [mss 1460,sackOK,TS val 510994164 ecr 1172932240,nop,wscale 7], length 0
10:16:04.017935 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 1, win 229, options [nop,nop,TS val 1172933616 ecr 510994164], length 0
10:16:04.017981 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [P.], seq 1:96, ack 1, win 229, options [nop,nop,TS val 1172933616 ecr 510994164], length 95
10:16:04.018002 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], ack 96, win 114, options [nop,nop,TS val 510994538 ecr 1172933616], length 0
10:16:04.018199 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [P.], seq 1:69, ack 96, win 114, options [nop,nop,TS val 510994539 ecr 1172933616], length 68
10:16:04.392396 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 69, win 229, options [nop,nop,TS val 1172933990 ecr 510994539], length 0
10:16:04.392512 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [P.], seq 96:189, ack 69, win 229, options [nop,nop,TS val 1172933990 ecr 510994539], length 93
10:16:04.392871 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [P.], seq 69:144, ack 189, win 114, options [nop,nop,TS val 510994913 ecr 1172933990], length 75
10:16:04.767145 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [P.], seq 189:274, ack 144, win 229, options [nop,nop,TS val 1172934365 ecr 510994913], length 85
10:16:04.782189 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 144:3040, ack 274, win 114, options [nop,nop,TS val 510995303 ecr 1172934365], length 2896
10:16:04.782215 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 3040:5936, ack 274, win 114, options [nop,nop,TS val 510995303 ecr 1172934365], length 2896
10:16:04.782230 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 5936:8832, ack 274, win 114, options [nop,nop,TS val 510995303 ecr 1172934365], length 2896
10:16:04.782241 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 8832:11728, ack 274, win 114, options [nop,nop,TS val 510995303 ecr 1172934365], length 2896
10:16:04.782254 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 11728:14624, ack 274, win 114, options [nop,nop,TS val 510995303 ecr 1172934365], length 2896
10:16:05.157766 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 3040, win 274, options [nop,nop,TS val 1172934755 ecr 510995303], length 0
10:16:05.157803 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [P.], seq 14624:17520, ack 274, win 114, options [nop,nop,TS val 510995678 ecr 1172934755], length 2896
10:16:05.157842 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 17520:18968, ack 274, win 114, options [nop,nop,TS val 510995678 ecr 1172934755], length 1448
10:16:05.158314 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 5936, win 319, options [nop,nop,TS val 1172934756 ecr 510995303], length 0
10:16:05.158339 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 18968:21864, ack 274, win 114, options [nop,nop,TS val 510995679 ecr 1172934756], length 2896
10:16:05.158848 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 364, options [nop,nop,TS val 1172934757 ecr 510995303], length 0
10:16:05.158865 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 21864:24760, ack 274, win 114, options [nop,nop,TS val 510995679 ecr 1172934757], length 2896
10:16:05.158873 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 24760:27656, ack 274, win 114, options [nop,nop,TS val 510995679 ecr 1172934757], length 2896
10:16:05.160718 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 387, options [nop,nop,TS val 1172934759 ecr 510995303,nop,nop,sack 1

{13176:14624}

], length 0
10:16:05.160757 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 27656:29104, ack 274, win 114, options [nop,nop,TS val 510995681 ecr 1172934759], length 1448
10:16:05.532451 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 410, options [nop,nop,TS val 1172935130 ecr 510995303,nop,nop,sack 1

{13176:16072}

], length 0
10:16:05.532489 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 8832:10280, ack 274, win 114, options [nop,nop,TS val 510996053 ecr 1172935130], length 1448
10:16:05.532503 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 432, options [nop,nop,TS val 1172935131 ecr 510995303,nop,nop,sack 1

{13176:17520}

], length 0
10:16:05.532729 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 455, options [nop,nop,TS val 1172935131 ecr 510995303,nop,nop,sack 1

{13176:18968}

], length 0
10:16:05.532766 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 10280:11728, ack 274, win 114, options [nop,nop,TS val 510996053 ecr 1172935131], length 1448
10:16:05.533161 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 477, options [nop,nop,TS val 1172935131 ecr 510995303,nop,nop,sack 1

{13176:20416}

], length 0
10:16:05.533187 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 11728:13176, ack 274, win 114, options [nop,nop,TS val 510996054 ecr 1172935131], length 1448
10:16:05.533606 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 500, options [nop,nop,TS val 1172935132 ecr 510995303,nop,nop,sack 1

{13176:21864}

], length 0
10:16:05.533644 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 29104:30552, ack 274, win 114, options [nop,nop,TS val 510996054 ecr 1172935132], length 1448
10:16:05.534257 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 523, options [nop,nop,TS val 1172935132 ecr 510995303,nop,nop,sack 1

{13176:23312}

], length 0
10:16:05.534295 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 30552:32000, ack 274, win 114, options [nop,nop,TS val 510996055 ecr 1172935132], length 1448
10:16:05.535356 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 545, options [nop,nop,TS val 1172935133 ecr 510995303,nop,nop,sack 1

{13176:24760}

], length 0
10:16:05.535393 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 32000:33448, ack 274, win 114, options [nop,nop,TS val 510996056 ecr 1172935133], length 1448
10:16:05.536454 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 8832, win 568, options [nop,nop,TS val 1172935134 ecr 510995303,nop,nop,sack 2

{27656:29104} {13176:24760}

], length 0
10:16:05.536491 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 33448:34896, ack 274, win 114, options [nop,nop,TS val 510996057 ecr 1172935134], length 1448
10:16:05.906816 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 10280, win 591, options [nop,nop,TS val 1172935505 ecr 510996053,nop,nop,sack 2

{27656:29104} {13176:24760}

], length 0
10:16:05.906854 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 34896:36344, ack 274, win 114, options [nop,nop,TS val 510996427 ecr 1172935505], length 1448
10:16:05.906865 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 613, options [nop,nop,TS val 1172935505 ecr 510996053,nop,nop,sack 2

{27656:29104} {13176:24760}

], length 0
10:16:05.906876 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 36344:37792, ack 274, win 114, options [nop,nop,TS val 510996427 ecr 1172935505], length 1448
10:16:05.907654 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 636, options [nop,nop,TS val 1172935506 ecr 510996053,nop,nop,sack 2

{27656:30552} {13176:24760}

], length 0
10:16:05.907691 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 11728:13176, ack 274, win 114, options [nop,nop,TS val 510996428 ecr 1172935506], length 1448
10:16:05.907706 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 37792:39240, ack 274, win 114, options [nop,nop,TS val 510996428 ecr 1172935506], length 1448
10:16:05.908457 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 658, options [nop,nop,TS val 1172935506 ecr 510996053,nop,nop,sack 2

{27656:32000} {13176:24760}

], length 0
10:16:05.908495 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 24760:26208, ack 274, win 114, options [nop,nop,TS val 510996429 ecr 1172935506], length 1448
10:16:05.908506 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 26208:27656, ack 274, win 114, options [nop,nop,TS val 510996429 ecr 1172935506], length 1448
10:16:05.909641 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 681, options [nop,nop,TS val 1172935508 ecr 510996053,nop,nop,sack 2

{27656:33448} {13176:24760}

], length 0
10:16:05.909678 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [P.], seq 39240:42136, ack 274, win 114, options [nop,nop,TS val 510996430 ecr 1172935508], length 2896
10:16:05.910682 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 704, options [nop,nop,TS val 1172935509 ecr 510996053,nop,nop,sack 2

{27656:34896} {13176:24760}

], length 0
10:16:06.282528 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 11728, win 726, options [nop,nop,TS val 1172935880 ecr 510996053,nop,nop,sack 3

{36344:37792} {27656:34896} {13176:24760}

], length 0
10:16:06.282562 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 34896:36344, ack 274, win 114, options [nop,nop,TS val 510996803 ecr 1172935880], length 1448
10:16:06.290038 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 24760, win 749, options [nop,nop,TS val 1172935888 ecr 510996428,nop,nop,sack 2

{36344:37792} {27656:34896}

], length 0
10:16:06.290075 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 24760, win 772, options [nop,nop,TS val 1172935888 ecr 510996428,nop,nop,sack 2

{36344:39240} {27656:34896}

], length 0
10:16:06.290091 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 24760, win 794, options [nop,nop,TS val 1172935888 ecr 510996428,nop,nop,sack 2

{26208:34896} {36344:39240}

], length 0
10:16:06.290098 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 34896, win 817, options [nop,nop,TS val 1172935888 ecr 510996429,nop,nop,sack 1

{36344:39240}

], length 0
10:16:06.290107 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 42136:45032, ack 274, win 114, options [nop,nop,TS val 510996811 ecr 1172935888], length 2896
10:16:06.290155 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 45032:47928, ack 274, win 114, options [nop,nop,TS val 510996811 ecr 1172935888], length 2896
10:16:06.290177 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 47928:49376, ack 274, win 114, options [nop,nop,TS val 510996811 ecr 1172935888], length 1448
10:16:06.291990 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 34896, win 839, options [nop,nop,TS val 1172935888 ecr 510996429,nop,nop,sack 2

{40688:42136} {36344:39240}

], length 0
10:16:06.292029 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 49376:50824, ack 274, win 114, options [nop,nop,TS val 510996812 ecr 1172935888], length 1448
10:16:06.292039 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 34896, win 862, options [nop,nop,TS val 1172935888 ecr 510996429,nop,nop,sack 1

{36344:42136}

], length 0
10:16:06.292052 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 50824:52272, ack 274, win 114, options [nop,nop,TS val 510996812 ecr 1172935888], length 1448
10:16:06.657003 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 885, options [nop,nop,TS val 1172936255 ecr 510996803], length 0
10:16:06.664580 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 907, options [nop,nop,TS val 1172936262 ecr 510996803,nop,nop,sack 1

{43584:45032}

], length 0
10:16:06.665790 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 930, options [nop,nop,TS val 1172936264 ecr 510996803,nop,nop,sack 2

{46480:47928} {43584:45032}

], length 0
10:16:06.665818 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 42136:43584, ack 274, win 114, options [nop,nop,TS val 510997186 ecr 1172936264], length 1448
10:16:06.665834 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 52272:53720, ack 274, win 114, options [nop,nop,TS val 510997186 ecr 1172936264], length 1448
10:16:06.665843 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 953, options [nop,nop,TS val 1172936264 ecr 510996803,nop,nop,sack 2

{46480:49376} {43584:45032}

], length 0
10:16:06.665860 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 53720:55168, ack 274, win 114, options [nop,nop,TS val 510997186 ecr 1172936264], length 1448
10:16:06.666818 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 975, options [nop,nop,TS val 1172936265 ecr 510996803,nop,nop,sack 3

{50824:52272} {46480:49376} {43584:45032}

], length 0
10:16:06.666853 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 45032:46480, ack 274, win 114, options [nop,nop,TS val 510997187 ecr 1172936265], length 1448
10:16:06.666867 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 55168:56616, ack 274, win 114, options [nop,nop,TS val 510997187 ecr 1172936265], length 1448
10:16:06.666872 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 42136, win 998, options [nop,nop,TS val 1172936265 ecr 510996803,nop,nop,sack 2

{46480:52272} {43584:45032}

], length 0
10:16:06.666885 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 56616:58064, ack 274, win 114, options [nop,nop,TS val 510997187 ecr 1172936265], length 1448
10:16:07.040555 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 45032, win 1020, options [nop,nop,TS val 1172936638 ecr 510997186,nop,nop,sack 1

{46480:52272}

], length 0
10:16:07.040595 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 58064:59512, ack 274, win 114, options [nop,nop,TS val 510997561 ecr 1172936638], length 1448
10:16:07.040713 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 45032, win 1043, options [nop,nop,TS val 1172936639 ecr 510997186,nop,nop,sack 1

{46480:53720}

], length 0
10:16:07.040734 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 59512:60960, ack 274, win 114, options [nop,nop,TS val 510997561 ecr 1172936639], length 1448
10:16:07.041001 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 45032, win 1066, options [nop,nop,TS val 1172936639 ecr 510997186,nop,nop,sack 1

{46480:55168}

], length 0
10:16:07.041018 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 60960:62408, ack 274, win 114, options [nop,nop,TS val 510997561 ecr 1172936639], length 1448
10:16:07.041211 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1088, options [nop,nop,TS val 1172936639 ecr 510997187], length 0
10:16:07.041236 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 62408:63856, ack 274, win 114, options [nop,nop,TS val 510997562 ecr 1172936639], length 1448
10:16:07.042231 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1111, options [nop,nop,TS val 1172936640 ecr 510997187,nop,nop,sack 1

{56616:58064}

], length 0
10:16:07.042255 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 63856:65304, ack 274, win 114, options [nop,nop,TS val 510997563 ecr 1172936640], length 1448
10:16:07.414323 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1134, options [nop,nop,TS val 1172937012 ecr 510997187,nop,nop,sack 1

{56616:59512}

], length 0
10:16:07.414360 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 65304:66752, ack 274, win 114, options [nop,nop,TS val 510997935 ecr 1172937012], length 1448
10:16:07.414370 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1156, options [nop,nop,TS val 1172937012 ecr 510997187,nop,nop,sack 1

{56616:60960}

], length 0
10:16:07.414381 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 55168:56616, ack 274, win 114, options [nop,nop,TS val 510997935 ecr 1172937012], length 1448
10:16:07.414784 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1179, options [nop,nop,TS val 1172937013 ecr 510997187,nop,nop,sack 1

{56616:62408}

], length 0
10:16:07.416343 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1201, options [nop,nop,TS val 1172937014 ecr 510997187,nop,nop,sack 1

{56616:63856}

], length 0
10:16:07.416382 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 66752:68200, ack 274, win 114, options [nop,nop,TS val 510997937 ecr 1172937014], length 1448
10:16:07.417459 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1224, options [nop,nop,TS val 1172937015 ecr 510997187,nop,nop,sack 1

{56616:65304}

], length 0
10:16:07.417496 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 68200:69648, ack 274, win 114, options [nop,nop,TS val 510997938 ecr 1172937015], length 1448
10:16:07.789195 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 55168, win 1247, options [nop,nop,TS val 1172937387 ecr 510997187,nop,nop,sack 1

{56616:66752}

], length 0
10:16:07.789240 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 69648:71096, ack 274, win 114, options [nop,nop,TS val 510998310 ecr 1172937387], length 1448
10:16:07.789252 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 66752, win 1269, options [nop,nop,TS val 1172937387 ecr 510997935], length 0
10:16:07.789267 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 71096:72544, ack 274, win 114, options [nop,nop,TS val 510998310 ecr 1172937387], length 1448
10:16:07.790104 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 68200, win 1292, options [nop,nop,TS val 1172937388 ecr 510997937], length 0
10:16:07.790131 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [P.], seq 72544:75440, ack 274, win 114, options [nop,nop,TS val 510998311 ecr 1172937388], length 2896
10:16:07.791628 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 69648, win 1315, options [nop,nop,TS val 1172937390 ecr 510997938], length 0
10:16:08.163364 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 71096, win 1337, options [nop,nop,TS val 1172937761 ecr 510998310], length 0
10:16:08.163390 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 72544, win 1360, options [nop,nop,TS val 1172937761 ecr 510998310], length 0
10:16:08.163419 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 75440:78336, ack 274, win 114, options [nop,nop,TS val 510998684 ecr 1172937761], length 2896
10:16:08.164232 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 73992, win 1382, options [nop,nop,TS val 1172937762 ecr 510998311], length 0
10:16:08.164251 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 75440, win 1405, options [nop,nop,TS val 1172937762 ecr 510998311], length 0
10:16:08.164264 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 78336:81232, ack 274, win 114, options [nop,nop,TS val 510998685 ecr 1172937762], length 2896
10:16:08.539507 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 76888, win 1424, options [nop,nop,TS val 1172938137 ecr 510998684], length 0
10:16:08.539532 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 78336, win 1424, options [nop,nop,TS val 1172938137 ecr 510998684], length 0
10:16:08.539559 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 81232:84128, ack 274, win 114, options [nop,nop,TS val 510999060 ecr 1172938137], length 2896
10:16:08.540021 IP zabbix-server-IP.32898 > zabbix-proxy-IP.zabbix-trapper: Flags [.], ack 78336, win 1424, options [nop,nop,TS val 1172938138 ecr 510998684,nop,nop,sack 1

{79784:81232}

], length 0
10:16:08.540061 IP zabbix-proxy-IP.zabbix-trapper > zabbix-server-IP.32898: Flags [.], seq 84128:87024, ack 274, win 114, options [nop,nop,TS val 510999061 ecr 1172938138], length 2896

On the proxy side I can see only one entry:
cannot send history data to server at "zabbix-server-IP": SSL_write() timed out

and on the server:

23046:20170810:102156.570 cannot obtain data from proxy "XXX-Proxy": connection closed during read