natd[330]: failed to write packet back (Permission denied)

bsd at bsd at
Wed Jun 18 05:15:59 PDT 2003

Doron Shmaryahu writes: 

> Hi, 
> This happens when natd cant send a packet back to a host. Nothing really to
> worry about. If it is happening all the time then start worrying. Could you
> give a display of your ipfw ruleset ?? 

Thanks for replying Doron. 

Could it be that natd returns the packet to ipfw, and the ruleset has a 
"deny" further down?  Since the advent of Bugbear-B thre has been a lot of 
incoming netbious stuff (which I block, but only after natd has had a go at 
the packet).  Perhaps this is the cause? 

Anyway, this particular server's ruleset has grown "organically" over about 
2 years, so it is rather a mess.  I think I need to give it a spring clean, 
remove the crud, and see how it behaves.  I'll come back if I'm still having 
this problem after that. 

Thanks again,

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