[Dnsmasq-discuss] DHCPv6 default port

Shixiong Shang sparkofwisdom.cloud at gmail.com
Tue Dec 17 20:10:29 GMT 2013


I think dnsmasq process is bound to the right port, but it is not listening on udp6 part. 



Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:9697            0.0.0.0:*               LISTEN      2103/python
tcp6       0      0 2001:db8:3::1:547       :::*                    LISTEN      2536/dnsmasq
tcp6       0      0 fe80::f816:3eff:fe0:547 :::*                    LISTEN      2536/dnsmasq
tcp6       0      0 2001:db8:192:168::1:547 :::*                    LISTEN      2533/dnsmasq
tcp6       0      0 fe80::f816:3eff:fe5:547 :::*                    LISTEN      2533/dnsmasq
udp6       0      0 2001:db8:3::1:547       :::*                                2536/dnsmasq
udp6       0      0 fe80::f816:3eff:fe0:547 :::*                                2536/dnsmasq
udp6       0      0 2001:db8:192:168::1:547 :::*                                2533/dnsmasq
udp6       0      0 fe80::f816:3eff:fe5:547 :::*                                2533/dnsmasq


Shixiong




On Dec 17, 2013, at 1:15 PM, Shixiong Shang <sparkofwisdom.cloud at gmail.com> wrote:

> Hi, expert:
> 
> I am using dnsmasq as DHCPv6 server. By default, dnsmasq is bound to port 53. I used --port option to bind it to UDP/547, since this is what my DHCPv6 client sends the query to. However, the dnsmasq never saw the DHCPv6 packets coming in afterwards. Based on tcpdump, I could see DHCPv6 packets hit dnsmasq binding interface, but dnsmasq log didn't report anything.
> 
> So I am wondering whether the port other than 53 is supported?
> 
> Thanks!
> 
> Shixiong
> 
> 




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