Re: nat drop the icmp redirect packet

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于 2011年11月28日 09:12, Gao feng 写道:
> Hi
> 
> In func nf_nat_icmp_reply_translation,the icmp packet will be droped when the nat is not finished.
> pc A(whose gateway is C) send a icmp request to pc B.
> When gw C receive this packet,it may return a icmp redirect packet to A.
> BUT now,the icmp request packet has not go to POSTROUTING,So the nat is not finished.
> Finally,the icmp redirect packet will be droped no matter the conn has nat or not.
> 
> of course,the icmp redirect packet will be correct handled when nat is finished.
> 
> Can somebody will give me some suggestion,
> or should I just add a sysctl to let the user decide drop or receive this icmp redirect packet when nat is not finished?
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or maybe we can move the ip_rt_send_redirect from FORWARD to POSTROUTING?
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