DHCP problems with a DD-WRT router

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by ladr » Wed Oct 19, 2011 4:11 am
My DD-WRT router was having problems with Sonic's very short DHCP lease times. Each time the lease would expire, the connection would drop.

This was particularly noticeable when streaming video: the video would have to be reloaded each time the lease expired.

This article gave a fix which worked:
http://yllus.com/2011/03/25/fix-my-dd-w ... dhcp-lease

What I did was:
Add a rule to specifically allow those (DHCP renewal) messages. Do this by navigating within your router’s interface to Administration > Commands, and entering the following into the Commands fields:

iptables -I INPUT 2 -p udp --sport 67 --dport 68 -j ACCEPT

Finally, press the Save Firewall button to save the rule to be executed whenever the router is restarted.
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