[freebsd] l2tp за NAT'ом (без IPSEC)

Oleg V. Nauman oleg at opentransfer.com
Wed Apr 12 19:59:38 EEST 2017


On Wednesday 12 April 2017 21:00:21 Irina Liakh wrote:
> On Wed, Apr 12, 2017 at 10:27:06PM +0700, Eugene Grosbein wrote:
> > 13.04.2017 0:43, Irina Liakh пишет:
> > > tcpdump вдогонку показывала,
> > 
> > Но без командной строки (без аргументов), а это важно.
> > Нужна полная команда и её вывод подряд. Не забыть ключи tcpdump -vnps0 и
> > -i.
> # tcpdump -i ng0 -nvv -s0 host 8.8.8.8
> tcpdump: listening on ng0, link-type NULL (BSD loopback), capture size 65535
> bytes
> 
> 18:14:32.026819 IP (tos 0x0, ttl 47, id 43783, offset 0, flags [none], proto
> TCP (6), length 60) 8.8.8.8.53 > 10.1.10.35.19622: Flags [S.], cksum 0x8bd2
> (correct), seq 2705699001, ack 1100352957, win 42408, options [mss
> 1380,sackOK,TS val 191452110 ecr 27279500,nop,wscale 7], length 0
> 18:14:33.248339 IP (tos 0x10, ttl 64, id 53661, offset 0, flags [DF], proto
> TCP (6), length 60) 10.1.10.35.32320 > 8.8.8.8.53: Flags [S], cksum 0x687d
> (correct), seq 3826082216, win 65535, options [mss 1356,nop,wscale
> 6,sackOK,TS val 27300588 ecr 0], length 0 18:14:33.311649 IP (tos 0x0, ttl
> 47, id 50242, offset 0, flags [none], proto TCP (6), length 60) 8.8.8.8.53
> > 10.1.10.35.32320: Flags [S.], cksum 0x2307 (correct), seq 3492863450, ack
> 3826082217, win 42408, options [mss 1380,sackOK,TS val 795394607 ecr
> 27300588,nop,wscale 7], length 0 18:14:33.611997 IP (tos 0x0, ttl 47, id
> 50422, offset 0, flags [none], proto TCP (6), length 60) 8.8.8.8.53 >
> 10.1.10.35.32320: Flags [S.], cksum 0x21db (correct), seq 3492863450, ack
> 3826082217, win 42408, options [mss 1380,sackOK,TS val 795394907 ecr
> 27300588,nop,wscale 7], length 0 18:14:35.611427 IP (tos 0x0, ttl 47, id
> 51708, offset 0, flags [none], proto TCP (6), length 60) 8.8.8.8.53 >
> 10.1.10.35.32320: Flags [S.], cksum 0x1a0b (correct), seq 3492863450, ack
> 3826082217, win 42408, options [mss 1380,sackOK,TS val 795396907 ecr
> 27300588,nop,wscale 7], length 0 18:14:36.248404 IP (tos 0x10, ttl 64, id
> 53666, offset 0, flags [DF], proto TCP (6), length 60) 10.1.10.35.32320 >
> 8.8.8.8.53: Flags [S], cksum 0x5cc4 (correct), seq 3826082216, win 65535,
> options [mss 1356,nop,wscale 6,sackOK,TS val 27303589 ecr 0], length 0
> 18:14:36.311682 IP (tos 0x0, ttl 47, id 52098, offset 0, flags [none],
> proto TCP (6), length 60) 8.8.8.8.53 > 10.1.10.35.32320: Flags [S.], cksum
> 0x174f (correct), seq 3492863450, ack 3826082217, win 42408, options [mss
> 1380,sackOK,TS val 795397607 ecr 27300588,nop,wscale 7], length 0
> 
> 
> "-p" же не принципиально?
> 
> > Ядро GENERIC или нет? В /boot/loader.conf и /etc/sysctl.conf есть
> > недефолтные настройки?
> Да, GENERIC.
> В /boot/loader.conf только относящееся к wpi. В /etc/sysctl.conf пусто.

 И wifi роутер с NAT ?




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