Re: advanced routing with NAT: returning UDP traffic

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Op vrijdag 26 september 2014 15:18:42 schreef Pascal Hambourg:
> Maarten Vanraes a écrit :
> > Op woensdag 24 september 2014 15:38:26 schreef Eliezer Croitoru:
> >> VOIP and STREAMING are beasts!!!
> >> There are modules which analyze them and also recognize them but you
> >> will need to enable them first.
> > 
> > what kind of modules do you know that help conntracking this kind of
> > stuff?
> 
> For SIP : nf_conntrack_sip. There is a nf_conntrack_<protocol> helper
> for each supported "complex" protocol (FTP, IRC, PPTP...). Their purpose
> is to set the state of the first packet of the data connection to
> RELATED, and copy the connmark of the control connection to the data
> connection. On a box doing NAT, you also need the related
> nf_nat_<protocol> module.
> 
> > and... what about ipv6 and multiple ISPs? (but without natting, but still
> > no bgp or something), won't i still have the same problem?
> 
> Yes.


awesome, this makes it totally clear... thx!
-- 
BA NV
IT & Security
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