Dear @AkosBakos ,
Thanks for your reply!
I forgot to mention fw unloadlocal made no difference sadly.
tcpdump produces some lines below. I am now reading them to find out how negotiation goes.
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tcpm dump -i any host * "10.31.10.2 and port 443* ` + " -v
tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
17:09:13.536651 IP (tos 0x0, ttl 128, id 13806, offset 0, flags [DF], proto TCP (6), length 52)
10.31.10.2.63149 > 10.31.10.1.https: Flags [S], cksum 0xa3d6 (correct), seq 1719862977, win 8192, options [mss 8960,nop,wscale 8,nop,nop,sackOK], length 0
17:09:13.536820 IP (tos 0x0, ttl 128, id 13807, offset 0, flags [DF], proto TCP (6), length 52)
10.31.10.2.63150 > 10.31.10.1.https: Flags [S], cksum 0x9255 (correct), seq 2859521107, win 8192, options [mss 8960,nop,wscale 8,nop,nop,sackOK], length 0
17:09:13.537155 IP (tos 0x0, ttl 255, id 32705, offset 0, flags [DF], proto TCP (6), length 52)
10.31.10.1.https > 10.31.10.2.63149: Flags [S.], cksum 0xa584 (correct), seq 2973338197, ack 1719862978, win 65535, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0
17:09:13.537325 IP (tos 0x0, ttl 128, id 13808, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63149 > 10.31.10.1.https: Flags [.], cksum 0xde50 (correct), ack 1, win 2053, length 0
17:09:13.537361 IP (tos 0x0, ttl 255, id 53789, offset 0, flags [DF], proto TCP (6), length 52)
10.31.10.1.https > 10.31.10.2.63150: Flags [S.], cksum 0xbf5f (correct), seq 3110229712, ack 2859521108, win 65535, options [mss 1460,nop,nop,sackOK,nop,wscale 6], length 0
17:09:13.537440 IP (tos 0x0, ttl 255, id 63971, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63149: Flags [.], cksum 0xd655 (correct), ack 1, win 4096, length 0
17:09:13.537474 IP (tos 0x0, ttl 128, id 13809, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63150 > 10.31.10.1.https: Flags [.], cksum 0xf82b (correct), ack 1, win 2053, length 0
17:09:13.537549 IP (tos 0x0, ttl 255, id 48412, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63150: Flags [.], cksum 0xf030 (correct), ack 1, win 4096, length 0
17:09:13.538479 IP (tos 0x0, ttl 128, id 13810, offset 0, flags [DF], proto TCP (6), length 1500)
10.31.10.2.63150 > 10.31.10.1.https: Flags [.], cksum 0x7b59 (correct), seq 1:1461, ack 1, win 2053, length 1460
17:09:13.538499 IP (tos 0x0, ttl 128, id 13811, offset 0, flags [DF], proto TCP (6), length 281)
10.31.10.2.63150 > 10.31.10.1.https: Flags [P.], cksum 0xa10c (correct), seq 1461:1702, ack 1, win 2053, length 241
17:09:13.538585 IP (tos 0x0, ttl 255, id 35683, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63150: Flags [.], cksum 0xe98b (correct), ack 1702, win 4096, length 0
17:09:13.538958 IP (tos 0x0, ttl 128, id 13812, offset 0, flags [DF], proto TCP (6), length 1500)
10.31.10.2.63149 > 10.31.10.1.https: Flags [.], cksum 0x1bf2 (correct), seq 1:1461, ack 1, win 2053, length 1460
17:09:13.538974 IP (tos 0x0, ttl 128, id 13813, offset 0, flags [DF], proto TCP (6), length 281)
10.31.10.2.63149 > 10.31.10.1.https: Flags [P.], cksum 0x15e6 (correct), seq 1461:1702, ack 1, win 2053, length 241
17:09:13.539079 IP (tos 0x0, ttl 255, id 64834, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63149: Flags [.], cksum 0xcfb0 (correct), ack 1702, win 4096, length 0
17:09:43.538797 IP (tos 0x0, ttl 128, id 13854, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63150 > 10.31.10.1.https: Flags [F.], cksum 0xf185 (correct), seq 1702, ack 1, win 2053, length 0
17:09:43.539003 IP (tos 0x0, ttl 255, id 21090, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63150: Flags [F.], cksum 0xe989 (correct), seq 1, ack 1703, win 4096, length 0
17:09:43.539113 IP (tos 0x0, ttl 128, id 13855, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63150 > 10.31.10.1.https: Flags [.], cksum 0xf184 (correct), ack 2, win 2053, length 0
17:09:43.543726 IP (tos 0x0, ttl 128, id 13857, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63149 > 10.31.10.1.https: Flags [F.], cksum 0xd7aa (correct), seq 1702, ack 1, win 2053, length 0
17:09:43.543854 IP (tos 0x0, ttl 255, id 24790, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.1.https > 10.31.10.2.63149: Flags [F.], cksum 0xcfae (correct), seq 1, ack 1703, win 4096, length 0
17:09:43.543953 IP (tos 0x0, ttl 128, id 13859, offset 0, flags [DF], proto TCP (6), length 40)
10.31.10.2.63149 > 10.31.10.1.https: Flags [.], cksum 0xd7a9 (correct), ack 2, win 2053, length 0
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Saitoh
sliver bullet: casting repero or tossing it into the harbor