[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: ip_forward - 2 nics



On Thu, Nov 07, 2002 at 12:03:24PM -0200, Christoph Simon wrote......
 
> I didn't read the start of the thread, but from what I'm seeing here,
> you are missing some masquerading or source nat. First make sure, the
> default policy of all enabled iptables is ACCEPT and not DROP (most
> probably, it's OK). Then, you need to add an iptables-rule like:
> 
> 	iptables -t nat -A POSTROUTING -s $LAN -o eth1 -j SNAT $IPE
> 
> if you have a static external IP address, or just
> 
> 	iptables -t nat -A POSTROUTING -s $LAN -o eth1 -j MASQUERADE
> 
> assuming that LAN is something like 10.0.0.0/8 (your local network and
> mask), eth1 is your external interface and IPE is the external IP you
> have.
 
Sorry about the two posts in a row, but I forgot to mention this is the
earlier post ...

When I try pinging to the outside world from the client (via the proxy
box) I can't get out.  In trying to gather more clues, I did the
following:

sumida:/etc/init.d# cat /proc/net/ip_conntrack
<snip>
udp  17 9 src=10.10.10.156 dst=192.168.2.254 sport=1059 dport=53
[UNREPLIED] src=192.168.2.254 dst=192.168.2.254 sport=53 dport=1059
use=1
udp  17 17 src=10.10.10.156 dst=167.206.112.4 sport=1061 dport=53
[UNREPLIED] src=167.206.112.4 dst=192.168.2.254 sport=53 dport=1061
use=1

The first destination (192.168.2.254) is the router.  The second dest is
a DNS server on the outside world.  In both cases the [UNREPLIED]
message is appended.  Is that the proxy box 'not replying'?

Thanks, Kevin

-- 

Kevin Coyner
mailto: kevin@rustybear.com
GnuPG key: 1024D/8CE11941

Attachment: pgpzRClaZWO4i.pgp
Description: PGP signature


Reply to: