RE: Bizarre NAT behavior

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On Thursday 2011-06-23 17:17, Greg Scott wrote:

>Wow, more than a week later and silence from everyone - am I on my own
>with this problem?  Why would NATing in both PREROUTING and POSTROUTING
>work  **only**  when I watch it with tcpdump and not work otherwise?
>Surely I can't be the only one seeing this problem?

Potential explanation: Packets being dropped inside the routing core due 
to violation of RP filter. [tcpdump hooks in very early and thus can 
still see stuff.]
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