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Monday, October 25, 2010

AT&T uVerse Residential Gateway Timeout with DD-WRT



ddwrt_logoThis week I upgraded to a new DD-WRT install on my Asus RT-N16 router. What I found was that EXACTLY every 10 minutes, the router would drop all connections momentarily and then reconnect.  I drove myself nuts for awhile trying to figure this out before finding this information on DD-WRT’s bug tracking site:

Summary:

The default configuration of the DD-WRT firewall blocks DHCP renewal responses which causes it to request a new IP and for current connections to be dropped whether the address changes or not.  The ATT Gateway receives a 10-minute lease and if the response from the DD-WRT router is not successfully received, all connections are dropped.  Once you add the command below to the firewall, the lease will renew every five minutes.

 

To solve the issue, save this command to the firewall script on the

Administration->Commands page of the DD-WRT web interface.  After that, smooth sailing!


iptables -I INPUT -p udp --dport 68 -j ACCEPT

 

Thanks to CompRepairGurus for the tip as well, which was the first result I found when Googling about this problem.

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