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netfilter: conntrack: udp: set stream timeout to 2 minutes 

We have no explicit signal when a UDP stream has terminated, peers just
stop sending.

For suspected stream connections a timeout of two minutes is sane to keep
NAT mapping alive a while longer.

It matches tcp conntracks 'timewait' default timeout value.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2018-12-18 00:05:29 +01:00 committed by Pablo Neira Ayuso
parent d535c8a69c
commit 294304e4c5
2 changed files with 2 additions and 2 deletions
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2
Documentation/networking/nf_conntrack-sysctl.txt
View File

@ -157,7 +157,7 @@ nf_conntrack_udp_timeout - INTEGER (seconds)
default 30
nf_conntrack_udp_timeout_stream - INTEGER (seconds)
default 180
default 120
This extended timeout will be used in case there is an UDP stream
detected.

2
net/netfilter/nf_conntrack_proto_udp.c
View File

@ -29,7 +29,7 @@
static const unsigned int udp_timeouts[UDP_CT_MAX] = {
[UDP_CT_UNREPLIED] = 30*HZ,
[UDP_CT_REPLIED] = 180*HZ,
[UDP_CT_REPLIED] = 120*HZ,
};
static unsigned int *udp_get_timeouts(struct net *net)