мыслей больше нет, исключил роутеры, удалил ufw, удалил виртуальный интерфейс, не работает...
22:05:11.724251 IP (tos 0x0, ttl 64, id 35100, offset 0, flags [DF], proto TCP (6), length 52)
***********.8000 > 31.173.80.31.38205: Flags [.], cksum 0x2804 (correct), ack 583, win 236, options [nop,nop,TS val 83279 ecr 754891181], length 0
22:05:11.731472 IP (tos 0x0, ttl 64, id 35101, offset 0, flags [DF], proto TCP (6), length 280)
***********.8000 > 31.173.80.31.38205: Flags [P.], cksum 0xb90b (correct), seq 1:229, ack 583, win 236, options [nop,nop,TS val 83281 ecr 754891181], length 228
22:05:11.731504 IP (tos 0x0, ttl 64, id 35102, offset 0, flags [DF], proto TCP (6), length 69)
***********.8000 > 31.173.80.31.38205: Flags [P.], cksum 0x0fb8 (correct), seq 229:246, ack 583, win 236, options [nop,nop,TS val 83281 ecr 754891181], length 17
22:05:11.731524 IP (tos 0x0, ttl 64, id 35103, offset 0, flags [DF], proto TCP (6), length 57)
***********.8000 > 31.173.80.31.38205: Flags [P.], cksum 0xe2e5 (correct), seq 246:251, ack 583, win 236, options [nop,nop,TS val 83281 ecr 754891181], length 5
22:05:11.731847 IP (tos 0x0, ttl 64, id 35104, offset 0, flags [DF], proto TCP (6), length 52)
***********.8000 > 31.173.80.31.38205: Flags [F.], cksum 0x2707 (correct), seq 251, ack 583, win 236, options [nop,nop,TS val 83281 ecr 754891181], length 0
22:05:11.799318 IP (tos 0x0, ttl 51, id 23529, offset 0, flags [DF], proto TCP (6), length 52)
31.173.80.31.38205 > ***********.8000: Flags [.], cksum 0x1459 (correct), ack 229, win 4098, options [nop,nop,TS val 754892124 ecr 83281], length 0
22:05:11.808819 IP (tos 0x0, ttl 51, id 14580, offset 0, flags [DF], proto TCP (6), length 52)
31.173.80.31.38205 > ***********.8000: Flags [.], cksum 0x1449 (correct), ack 246, win 4097, options [nop,nop,TS val 754892124 ecr 83281], length 0
22:05:11.818814 IP (tos 0x0, ttl 51, id 35459, offset 0, flags [DF], proto TCP (6), length 52)
31.173.80.31.38205 > ***********.8000: Flags [.], cksum 0x1444 (correct), ack 251, win 4097, options [nop,nop,TS val 754892124 ecr 83281], length 0
22:05:11.838841 IP (tos 0x0, ttl 51, id 60474, offset 0, flags [DF], proto TCP (6), length 52)
31.173.80.31.38205 > ***********.8000: Flags [.], cksum 0x1443 (correct), ack 252, win 4097, options [nop,nop,TS val 754892124 ecr 83281], length 0
22:05:11.848794 IP (tos 0x0, ttl 51, id 49902, offset 0, flags [DF], proto TCP (6), length 52)
31.173.80.31.38205 > ***********.8000: Flags [F.], cksum 0x1440 (correct), seq 583, ack 252, win 4097, options [nop,nop,TS val 754892126 ecr 83281], length 0
22:05:11.848813 IP (tos 0x0, ttl 64, id 7365, offset 0, flags [DF], proto TCP (6), length 52)
***********.8000 > 31.173.80.31.38205: Flags [.], cksum 0x2338 (correct), ack 584, win 236, options [nop,nop,TS val 83310 ecr 754892126], length 0