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Groups > comp.os.linux.networking > #1258
| From | Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> |
|---|---|
| Newsgroups | comp.os.linux.networking |
| Subject | Re: linux as multi-port (subnet) router using Ubuntu 11.10 server |
| Date | 2012-04-09 21:01 +0200 |
| Organization | Plouf ! |
| Message-ID | <jlvbm4$u16$1@saria.nerim.net> (permalink) |
| References | (7 earlier) <26518308.9.1333903498341.JavaMail.geo-discussion-forums@pbtd9> <jlsjd0$2u7i$1@saria.nerim.net> <13689836.1943.1333930427032.JavaMail.geo-discussion-forums@pbvs10> <jlu7ip$g2l$1@saria.nerim.net> <23753461.82.1333978858232.JavaMail.geo-discussion-forums@pbvy6> |
lincy a écrit : > Sorry, I was wrong. I was issue some iptable rule. It cannot possibly be an issue with some iptables rule, as iptables-save showed no rule at all. > dump for eth2: > 21:00:36.457244 ARP, Request who-has 192.168.3.51 tell 192.168.51.1, length 28 Huh ? "tell 192.168.51.1" ? What is the address configured on eth2 ? > 21:00:36.457510 ARP, Reply 192.168.3.51 is-at 70:5a:b6:40:02:d5, length 46 > 21:00:36.593887 IP 192.168.2.181 > 192.168.3.51: ICMP echo request, id 3, seq 56228, length 40 [...] So the echo request is forwarded, but no reply ever comes back. I can see only two explanations : - host 192.168.3.51 default route is misconfigured or missing - or it has a firewall which drops requests from other subnets. > Ok, here is what I try... > > iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -d 192.168.3.0/24 -j SNAT --to 192.168.3.1 > iptables -t nat -A POSTROUTING -s 192.168.3.0/24 -d 192.168.2.0/24 -j SNAT --to 192.168.2.1 Ah, SNAT aka masquerading. It is called "masquerading" because it masquerades the source address, but I like to say that it is actually used to masquerade the real - routing of filtering - problem. > now can ping from 192.168.2.x to 192.168.3.x, vice versa.
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linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 05:50 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2012-04-08 17:16 +0300
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 08:26 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 08:47 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 18:13 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 09:24 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 18:31 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 09:44 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 19:54 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 17:13 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-09 10:45 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-09 06:40 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-09 21:01 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-09 12:56 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-09 23:33 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2012-04-10 08:55 +0300
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-09 23:40 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2012-04-10 14:39 +0300
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-10 08:22 -0700
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2012-04-08 21:13 +0300
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 20:48 +0200
Re: linux as multi-port (subnet) router using Ubuntu 11.10 server lincy <lincylin@gmail.com> - 2012-04-08 17:25 -0700
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