[Ekiga-list] [solved] Misdirected RTP stream?

Jan Kasprzak kas at fi.muni.cz
Fri Oct 6 16:20:53 UTC 2006


Jan Kasprzak wrote:
: I have problem with call setup between two ekigas (both are 2.0.2-3 from Fedora
: Core 5), none of them behind any NAT. The problem is, that local ekiga
: seem to send the RTP stream to an incorrect IP address - 213.186.62.145,
: which according to my DNS is reverse mapped to "ekiga.net" hostname.
: The rmote side sends the RTP stream correctly. So I can see and hear
: the remote side, but they cannot hear or see me.

	The source of this problem was my firewall, it seems that
Linux 2.6.18 netfilter mangles the SIP packets when the SIP NAT/conntrack
helper is compiled in (even though no NAT is actually set up). After
inactivating conntrack using "iptables -t raw -A PREROUTING -j NOTRACK"
the SIP calls work again.

	I have filled a Netfilter bug at

https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=522

Thanks to Damien for helping me to figure out where the problem might be.

-Yenya

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/    Journal: http://www.fi.muni.cz/~kas/blog/ |
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