[Bug 1501] New: issue with DNAT port range

bugzilla-daemon at netfilter.org bugzilla-daemon at netfilter.org
Fri Feb 12 11:03:47 CET 2021


https://bugzilla.netfilter.org/show_bug.cgi?id=1501

            Bug ID: 1501
           Summary: issue with DNAT port range
           Product: nftables
           Version: unspecified
          Hardware: x86_64
                OS: Debian GNU/Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: nft
          Assignee: pablo at netfilter.org
          Reporter: arturo at netfilter.org

Original bug report in the Debian bug tracker:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=970672

When I try to dnat:

ip daddr $ext_ip tcp dport 55900-55910 dnat to $target_lan_host:5900-5910
persistent

I want to dnat 55900 to 5900, 55901 to 5901...55910 to 5910.
But all range 55900-55910 was redirected into first single port 5900

If i try :

ip daddr $ext_ip tcp dport 5900-5910 dnat to $target_lan_host:5900-5910
persistent

its work well, all port was redirected properly

This was present at least in nftables 0.9.6, but not sure if a kernel component
is also responsible for this behavior.

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