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 :: Mailing Lists

[ILUG] iptables, nat and ftp stopped working

[ILUG] iptables, nat and ftp stopped working

Paul Jakma paulj at alphyra.ie
Thu Oct 3 12:40:03 IST 2002


On Thu, 3 Oct 2002, John Allman wrote:

> In the end i got things going again by setting up passive ftp to work 
> properly. i still dont know why active ftp didn't/doesn't work

because you only setup filtering rules. you need to add a rule in the 
'nat' table, POSTROUTING to do SNAT/MASQUERADE, and make sure you have 
the ftp connection tracking installed. :) OTOMH:

iptables -t nat -I POSTROUTING -i <internal> -o <external> --dport ftp 
-j MASQUERADE

(or -j SNAT <myexternal ip>

> John

regards,
-- 
Paul Jakma	Sys Admin	Alphyra
	paulj at alphyra.ie
Warning: /never/ send email to spam at dishone.st or trap at dishone.st




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