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<base href="https://bugzilla.netfilter.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - icmpv6 mld-listener-query not detcted"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1138">1138</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>icmpv6 mld-listener-query not detcted
</td>
</tr>
<tr>
<th>Product</th>
<td>nftables
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86_64
</td>
</tr>
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<th>OS</th>
<td>SuSE 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>kernel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bratislav.ilic@prointer.rs
</td>
</tr></table>
<p>
<div>
<pre>It seems that nftables in Linux 4.10.4-1-default #1 SMP PREEMPT Sat Mar 18
12:29:57 UTC 2017 (e2ef894) x86_64 x86_64 x86_64 GNU/Linux just does not detect
icmpv6 mld-listener-query packets.
With following ruleset
table inet filter {
chain INPUT {
type filter hook input priority 0; policy drop;
iif "lo" accept
ct state { related, established} accept
ct state invalid counter packets 8 bytes 411 drop
iif "ens192" icmpv6 type mld-listener-query counter packets 0
bytes 0 drop
iif "ens192" icmpv6 type mld-listener-report counter packets 22
bytes 1408 drop
iif "ens192" counter packets 65 bytes 4680 log prefix "UNKOWN
Scanner!: " reject
}
I get type 131 (mld-listener-report) packets dropped, but not 130
(mld-listener-query) ...
dmesg
[45184.023825] UNKOWN Scanner!: IN=ens192 OUT=
MAC=33:33:00:00:00:01:64:66:b3:80:77:42:86:dd
SRC=fe80:0000:0000:0000:6666:b3ff:fe80:7742
DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=72 TC=0 HOPLIMIT=1 FLOWLBL=0
PROTO=ICMPv6 TYPE=130 CODE=0
Also it seems that this issue has been around for quite some time and I have
found it reported before:
<a href="https://www.spinics.net/lists/netfilter/msg55746.html">https://www.spinics.net/lists/netfilter/msg55746.html</a>
Best regards,
Bratislav ILIC</pre>
</div>
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