﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
13475	UDP NAT bindings should not be closed on ICMP unreachable	ocrete		"Currently, when VirtualBox is in NAT mode and the guest sends a UDP packet, the NAT creates a mapping for this packet, so that any incoming packet back to this port will be forwarded back. This mapping is (correctly) only based on the source port. So it is possible to ""discover"" the mapping from the guest by using STUN. The problem is that if any target returns a ICMP Unreachable then it deletes the mapping... But this is incorrect as the same maping could be used to send packets to multiple destinations. The correct solution is to only drop UDP mappings based on a timeout. The current behavior breaks RFC 5245, which is used by WebRTC.

Also, the current behavior is a ""MUST NOT"" in RFC 4787 section 9."	defect	closed	network/NAT	VirtualBox 4.3.16	fixed			other	other
