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<base href="https://bugzilla.netfilter.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Problem with import of small iptables rule sets with multiport match"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1233">1233</a>
</td>
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<th>Summary</th>
<td>Problem with import of small iptables rule sets with multiport match
</td>
</tr>
<tr>
<th>Product</th>
<td>nftables
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86_64
</td>
</tr>
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<th>OS</th>
<td>Debian GNU/Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P5
</td>
</tr>
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<th>Component</th>
<td>iptables over nftable
</td>
</tr>
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<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
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<th>Reporter</th>
<td>michael@mi-pietsch.de
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=531" name="attach_531" title="command in and output files">attachment 531</a> <a href="attachment.cgi?id=531&action=edit" title="command in and output files">[details]</a></span>
command in and output files
I found problems when importing iptables rules with iptables-compat-restore
<filename> if it contains multiport matches.
Steps to reproduce:
1. import the iptables file X.in with `iptables-compat-restore X.in`
2. run `nft list ruleset > x.out`
3. output for a.in, d.in, e.in, f.in contain unexpected output
The files with the used iptables rules and output are include in the bug.tar
attachment.
I found the following results:
* having an single rule containing `multiport` results in output of available
protocols (e.in, f.in)
* having two `multiport` rules with different match rules (eg. one with `-m
state`) results in garbage characters for the rules (a.in, d.in)
* having two `multiport` rules with same match and protocols works correctly
without garbage characters in output (b.in, g.in)
Order of the rules in the iptables file, the defined ports, define
single/multiple ports do not change the result.
Also noticable is that iptables-compat-save prints the imported iptables rules
correctly.
System: Debian Jessie (amd64) with current updates (14.03.2018)
nftables v0.7 (Scrooge McDuck) (dpkg-version 0.7-1)
iptables-nftables-compat 1.6.0+snapshot2016117-6
libnftnl4 1.0.7-1
Linux 4.9.0-6</pre>
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