Comments on: Fix: My DD-WRT router drops all connections when it renews a DHCP lease

By: Jim Dawson

Jim Dawson — Tue, 16 Apr 2019 10:49:59 +0000

Amazing this looks to have fixed my issue turning off SPI firewall alltogether, and I was tempted to ebay the router and get a new one due to it.

I was thinking Draytek Vigor 2862ac (WAN2) to replace my Linksys WRT3200ACM

By: Art

Art — Tue, 31 Oct 2017 01:34:13 +0000

First off, just want to say thanks for sleuthing and making a post about this. Even though this is years down the line, I just gave it a go and will see if it improves because I am running a relatively old (ancient) router and new builds are not an option (build 21061).

Secondly, would you mind giving a breakdown about the firewall rule and what is happening, or perhaps a good reference to easily digest info on the basics for a relative networking noob? Just looking to get more insight on the technical side.

Thanks!

By: euhill

euhill — Sun, 24 Feb 2013 03:24:50 +0000

Looks like the 13491 VINT build is plagued by this as well. After putting that line into the firewall the connection appears to be stable. Before I was getting disconnects every 3 to 10 minutes.

By: A Grateful User

A Grateful User — Tue, 21 Aug 2012 21:44:15 +0000

This problem is seen by people using Sonic.net because they renew their leases every 5 minutes (!).

This fixes it.

By: A Grateful User

A Grateful User — Tue, 21 Aug 2012 21:43:27 +0000

Thanks for this!

By: chris

chris — Thu, 26 Jan 2012 21:11:53 +0000

I’m having the same issue, but to me the DHCP server is responding with DHCPNAK. See:

http://www.dd-wrt.com/phpBB2/viewtopic.php?p=664855

Dunno what’s correct according to the DHCP RFC, but DD-WRT immediately drops the IP address and searches for a new one, leading to short network outages. My Fedora box is smart and keeps the IP although a NAK was received :(

By: Jakob

Jakob — Tue, 18 Oct 2011 10:09:29 +0000

The iptables command actually seems to have worked.

Thanks for the fix!