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<head>
<base href="https://bugzilla.netfilter.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Kernel IPv6 event filtering not working"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1062">1062</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Kernel IPv6 event filtering not working
</td>
</tr>
<tr>
<th>Product</th>
<td>conntrack-tools
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86_64
</td>
</tr>
<tr>
<th>OS</th>
<td>Debian GNU/Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P5
</td>
</tr>
<tr>
<th>Component</th>
<td>conntrack-daemon
</td>
</tr>
<tr>
<th>Assignee</th>
<td>netfilter-buglog@lists.netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>arturo.borrero.glez@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>IPv6 kernel filtering seems broken in conntrackd 1.4.3 with Linux kernel 4.4.
The test is simple:
* configure a two node conntrackd cluster to sync connections
* configure IPv6 kernelspace filtering
* launch `conntrack -E' to see conntrack events in both nodes
* launch some IPv6 matching traffic, and see it syncing to the other node
* switch the config to userspace filtering
* launch some IPv6 matching traffic, the sync don't happen this time.
This is an example configuration in one of my nodes:
==== 8< ====
Sync {
Mode NOTRACK {
DisableInternalCache on
DisableExternalCache on
}
TCP {
IPv4_address 10.0.0.201
IPv4_Destination_Address 10.0.0.202
Port 3780
Interface eth0
Checksum on
SndSocketBuffer 12492800
RcvSocketBuffer 12492800
}
Options {
ExpectationSync On
}
}
General {
Nice -20
Scheduler {
Type FIFO
Priority 99
}
Syslog on
LockFile /var/lock/conntrackd.lock
UNIX {
Path /var/run/conntrackd.sock
Backlog 20
}
NetlinkBufferSize 8000000
NetlinkBufferSizeMaxGrowth 80000000
Filter From Kernelspace {
Address Ignore {
IPv4_address 127.0.0.1
IPv4_address 10.0.0.200
IPv4_address 10.0.0.201
IPv4_address 10.0.0.202
IPv6_address ::1
IPv6_address fe00::200
IPv6_address fe00::201
IPv6_address fe00::202
}
}
EventIterationLimit 10
}
==== 8< ====
You can switch to userspace filtering by replacing the 'Kernelspace'
keyword and restarting the daemon:
==== 8< ====
Filter From Userspace {
Address Ignore {
IPv4_address 127.0.0.1
IPv4_address 10.0.0.200
IPv4_address 10.0.0.201
IPv4_address 10.0.0.202
IPv6_address ::1
IPv6_address fe00::200
IPv6_address fe00::201
IPv6_address fe00::202
}
}
==== 8< ====
Debian bug #690676 <a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690676">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690676</a></pre>
</div>
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