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0002543: Call registrations fail with h.323 phone systems - MantisBT

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Project

Category

View Status

Date Submitted

Last Update

0002543

Endian Firewall

Firewall (iptables)

public

2009-12-15 11:05

2010-03-08 15:01

Reporter

luca-endian

Assigned To

Priority

normal

Severity

minor

Reproducibility

have not tried

Status

confirmed

Resolution

open

Platform

OS Version

Product Version

2.2

Target Version

future

Fixed in Version

Summary

0002543: Call registrations fail with h.323 phone systems

Description

When using certain VOIP h.323 phone systems, call registrations fail
during the h.245 negotiation stage.
This occurs both on connections from the Blue network and LAN to LAN VPN
connections.

The problem is quite bizarre, one or two packets are dropped but when
resent the packets pass through, the packets dropped (tcp) are mid
stream. Some PABX systems seem to either timeout (very quickly) or
ignore resent packets.

The solution is to remove the nf_nat_h323,nf_conntrack_h323 modules from
the kernel with modprobe -r at boot time.

This most likely will break h323 across the public internet, affecting
programs such as net meeting but atleast H323./H.245 VOIPS works

Tags

purple

Attached Files

Relationships

has duplicate

0002748

closed

Problems with VoIP and OpenVPN Gw2GW

Notes
(0003973) peter-endian (administrator) 2010-03-08 14:59	Workaround is in 0002748

Issue History
Date Modified	Username	Field	Change
2009-12-15 11:05	luca-endian	New Issue
2009-12-15 11:06	luca-endian	Tag Attached: purple
2010-03-08 14:55	peter-endian	Status	new => confirmed
2010-03-08 14:56	peter-endian	Relationship added	has duplicate 0002748
2010-03-08 14:59	peter-endian	Note Added: 0003973
2010-03-08 15:01	peter-endian	Target Version	=> future