
Artem
05.06.2018
10:08:07
13:07:58.751988 In 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.60804 > 148.251.75.218.22: Flags [S], cksum 0x120a (correct), seq 1574383277, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 762956446 ecr 0,sackOK,eol], length 0
13:07:58.752011 Out 06:d4:00:bf:6c:f9 ethertype IPv4 (0x0800), length 56: (tos 0x0, ttl 64, id 13656, offset 0, flags [DF], proto TCP (6), length 40)
148.251.75.218.22 > 183.89.26.189.60804: Flags [R.], cksum 0x82c4 (correct), seq 0, ack 1574383278, win 0, length 0
вот при рефьюзе
13:13:43.086017 In cc:e1:7f:ac:7d:fc ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 51, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.60880 > 148.251.75.218.22: Flags [S], cksum 0x7a63 (correct), seq 169271982, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 763298227 ecr 0,sackOK,eol], length 0
13:13:43.086017 In cc:e1:7f:ac:7d:fc ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 51, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.60880 > 148.251.75.218.22: Flags [S], cksum 0x7a63 (correct), seq 169271982, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 763298227 ecr 0,sackOK,eol], length 0
13:13:43.086022 Out 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.60880 > 148.251.75.218.22: Flags [S], cksum 0x7a63 (correct), seq 169271982, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 763298227 ecr 0,sackOK,eol], length 0
13:13:43.086023 Out 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.60880 > 148.251.75.218.22: Flags [S], cksum 0x7a63 (correct), seq 169271982, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 763298227 ecr 0,sackOK,eol], length 0
13:13:43.086085 P 06:d4:00:bf:6c:f9 ethertype IPv4 (0x0800), length 56: (tos 0x0, ttl 64, id 48122, offset 0, flags [DF], proto TCP (6), length 40)
148.251.75.218.22 > 183.89.26.189.60880: Flags [R.], cksum 0x2238 (correct), seq 0, ack 169271983, win 0, length 0
13:13:43.086085 In 06:d4:00:bf:6c:f9 ethertype IPv4 (0x0800), length 56: (tos 0x0, ttl 64, id 48122, offset 0, flags [DF], proto TCP (6), length 40)
148.251.75.218.22 > 183.89.26.189.60880: Flags [R.], cksum 0x2238 (correct), seq 0, ack 1, win 0, length 0
13:13:43.086089 Out 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 56: (tos 0x0, ttl 63, id 48122, offset 0, flags [DF], proto TCP (6), length 40)
148.251.75.218.22 > 183.89.26.189.60880: Flags [R.], cksum 0x2238 (correct), seq 0, ack 1, win 0, length 0
13:13:43.086090 Out 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 56: (tos 0x0, ttl 63, id 48122, offset 0, flags [DF], proto TCP (6), length 40)
148.251.75.218.22 > 183.89.26.189.60880: Flags [R.], cksum 0x2238 (correct), seq 0, ack 1, win 0, length 0
а вот на хостовой машине tcpdump
похоже? https://serverfault.com/questions/751773/intermitent-connection-issues-inside-lxc

Artem
05.06.2018
10:41:07
тачка в хетцнере с отдельным IP’ом, никакого NAT’а
Я не заметил, а он вообще у тебя подключался?
13:41:29.044813 In 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 80: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 64)
183.89.26.189.61108 > 148.251.75.218.22: Flags [S], cksum 0x8a19 (correct), seq 4032277998, win 65535, options [mss 1412,nop,wscale 5,nop,nop,TS val 764952446 ecr 0,sackOK,eol], length 0
13:41:29.044840 Out 06:d4:00:bf:6c:f9 ethertype IPv4 (0x0800), length 76: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 60)
148.251.75.218.22 > 183.89.26.189.61108: Flags [S.], cksum 0xb31a (incorrect -> 0xd24a), seq 1682134301, ack 4032277999, win 28960, options [mss 1460,sackOK,TS val 2858466 ecr 764952446,nop,wscale 9], length 0
13:41:29.349823 In 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 68: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 52)
183.89.26.189.61108 > 148.251.75.218.22: Flags [.], cksum 0x60f9 (correct), seq 1, ack 1, win 4112, options [nop,nop,TS val 764952750 ecr 2858466], length 0
13:41:29.349825 In 44:8a:5b:d4:4d:ee ethertype IPv4 (0x0800), length 89: (tos 0x0, ttl 50, id 0, offset 0, flags [DF], proto TCP (6), length 73)
183.89.26.189.61108 > 148.251.75.218.22: Flags [P.], cksum 0x9b32 (correct), seq 1:22, ack 1, win 4112, options [nop,nop,TS val 764952751 ecr 2858466], length 21
13:41:29.349866 Out 06:d4:00:bf:6c:f9 ethertype IPv4 (0x0800), length 68: (tos 0x0, ttl 64, id 52017, offset 0, flags [DF], proto TCP (6), length 52)
148.251.75.218.22 > 183.89.26.189.61108: Flags [.], cksum 0xb312 (incorrect -> 0x706d), seq 1, ack 22, win 57, options [nop,nop,TS val 2858543 ecr 764952751], length 0
только такое вот в tcpdump’е
не подключается ж ) висит коннект