From 294304e4c522d797b7ea8200ab74354843fa68e9 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Tue, 18 Dec 2018 00:05:29 +0100 Subject: [PATCH] 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 Signed-off-by: Pablo Neira Ayuso --- Documentation/networking/nf_conntrack-sysctl.txt | 2 +- net/netfilter/nf_conntrack_proto_udp.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/networking/nf_conntrack-sysctl.txt b/Documentation/networking/nf_conntrack-sysctl.txt index 1669dc2419fd..e69b2e6a4a29 100644 --- a/Documentation/networking/nf_conntrack-sysctl.txt +++ b/Documentation/networking/nf_conntrack-sysctl.txt @@ -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. diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c index 9f2e05adba69..b4f5d5e82031 100644 --- a/net/netfilter/nf_conntrack_proto_udp.c +++ b/net/netfilter/nf_conntrack_proto_udp.c @@ -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)