path: root/doc/manual/conntrack-tools.tmpl
diff options
authorPablo Neira Ayuso <>2012-10-03 22:19:25 +0200
committerPablo Neira Ayuso <>2012-10-04 10:42:43 +0200
commit3f845636159298fb18b6d6c455066d0344a61bee (patch)
treed440bd11cafbfd7249aaffe5388d7eabcbc44966 /doc/manual/conntrack-tools.tmpl
parenta95338a1715b025bf1b39136ba10de5907c1080b (diff)
conntrackd: fix crash if ExpectationSync is enabled on old Linux kernels
ExpectationSync requires Linux kernel >= 3.5 to work sanely, document this. Still, we don't want to crash if someone enables expectation sync with old Linux kernels (like 2.6.32). Reported-by: James Gutholm <> Tested-by: James Gutholm <> Signed-off-by: Pablo Neira Ayuso <>
Diffstat (limited to 'doc/manual/conntrack-tools.tmpl')
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/manual/conntrack-tools.tmpl b/doc/manual/conntrack-tools.tmpl
index 47e6f84..63a53e4 100644
--- a/doc/manual/conntrack-tools.tmpl
+++ b/doc/manual/conntrack-tools.tmpl
@@ -660,6 +660,13 @@ Sync {
<sect3 id="sync-expect"><title>Synchronization of expectations</title>
+ <note><title>Check your Linux kernel version first</title>
+ <para>
+ The synchronization of expectations require a Linux kernel &gt;= 3.5
+ to work appropriately.
+ </para>
+ </note>
<para>The connection tracking system provides helpers that allows you to
filter multi-flow application protocols like FTP, H.323 and SIP among many
others. These protocols usually split the control and data traffic in