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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:


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.


  1. Is it possible to use the RT-N16 as your "modem" device to connect directly to U-Verse, or are you going through your 2WIRE device also?

  2. ATT won't let you take the 2WIRE residential gateway out of the middle as it is the device that authenticates with Uverse for you, so unfortunately you're stuck having to leave it in the mix.

    I have a uverse router and need to set the configuration for this issue. I am remote connecting to my desktop at work and every 10 mins it freezes up and then comes back.