----- Original Message -----

From: hclfm@pricol.co.in

To: Rob Sterenborg

Cc: 'Kevork' ; netfilter@lists.netfilter.org

Sent: Wednesday, March 10, 2004 6:13 AM

Subject: RE: Did MASQUERADE not work ?

> Iptables script is the same as when it worked.
> MASQ line is:
> iptables -t nat -A POSTROUTING -s 192.168.250.0/24 -d
> $internet -j MASQUERADE

Hi ,

You have missed the outgoing interface "-o" option ( Internet Interface )

iptables -t nat -A POSTROUTING -o eth1 -s 192.168.250.0/24 -d
$internet -j MASQUERADE

must work.

regards,

U.SivaKumar,
Networking & E-Security,
HCL INFOSYSTEMS LIMITED,

"The Purpose of Computing is Insight, Not Numbers"

"Rob Sterenborg" <rob@sterenborg.info>
Sent by: netfilter-admin@lists.netfilter.org
03/10/2004 08:52 AM CET

To: "'Kevork'" <rxlm@comintec.com.ar>, <netfilter@lists.netfilter.org>
cc:
bcc:
Subject: RE: Did MASQUERADE not work ?

> Iptables script is the same as when it worked.
> MASQ line is:
> iptables -t nat -A POSTROUTING -s 192.168.250.0/24 -d
> $internet -j MASQUERADE

What is "-d $internet" ?
If $internet is 0.0.0.0 (as it should be) then you don't need to specify it
as this is assumed.

Did you try SNAT :
iptables -t nat -A POSTROUTING -o <if_inet> \
 -s 192.168.250.0/24 -j SNAT --to-source <ip_inet>

Do you have a FORWARD rule in place that allows MASQ/SNAT, or do you have
FORWARD policy set to ACCEPT (which you should not do) ?

Do you have "echo 1 > /proc/sys/net/ipv4/ip_forward" ?


Gr,
Rob

=