Bug 19277 – iptables nat is broken with gentoo kernel

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description david mattatall 2003-04-13 21:35:28 UTC]

I have the following set in my /proc : 
 
echo 1 > /proc/sys/net/ipv4/ip_forward 
 
but 'iptables --table nat --append POSTROUTING --out-interface eth1 -j MASQUERADE' 
gives me the following error: 
 
iptables: Invalid argument 
 
My kernel config is as such: 
davidsmind# cat /proc/config |grep -i nat 
CONFIG_IP_NF_NAT=y 
CONFIG_IP_NF_NAT_NEEDED=y 
CONFIG_IP_NF_NAT_IRC=y 
CONFIG_IP_NF_NAT_FTP=y 
 
davidsmind# cat /proc/config |grep -i masq 
CONFIG_IP_NF_TARGET_MASQUERADE=y 
 
Ok, so I have my kernel configured for MASQing. 
 
 
As an aside, forwarding works: 
 
iptables --append FORWARD --in-interface eth1 -j ACCEPT 
 
gives no error at all. 

Reproducible: Always
Steps to Reproduce:
1. Compile Gentoo Sources 
2. Try to use masqurading 


Expected Results:  
Masqing works with other kernel's I've tried.

[Comment 1 Bob Johnson (RETIRED) 2003-04-13 22:35:29 UTC]

re-emerge iptables 
 
pfeifer can you add the ewarn back into -r2+ ebuilds 

[Comment 2 david mattatall 2003-04-13 22:47:14 UTC]

Thank you.