Eventually, it will get verbose and you'll see logs similar to the following :. First, you'll see 'full, dropping packet.' messages followed by 'messages suppressed.'. From the CLI:Ĭat /proc/sys/net/ipv4/netfilter/ip_conntrack_maxĤ096 # Here the router displays the maximum number of possible connections. Check to see if your problem is caused by TCP or UDP connections. If that's not possible, reboot the DD-WRT Device. 
Try to use the CLI to communicate with your router. Close all your P2P/network applications and wait a few minutes for connections to be freed. When this 'slowdown' occurs and the router doesn't respond to pings nor Web Interface requests, you still can check what's going on: 
Web Interface The default management method, open a browser to or your custom DD-WRT Device's LAN IP. Although configuration in other methods besides 'router' is possible, such a 'bridge', this article and phenomena only occurs in the default router configuration of DD-WRT. Within the context of this article does not mean Skype, or other 'lite' P2P applications.ĭD-WRT Device A Router running third-party, DD-WRT firmware. Definitions P2P Peer to Peer applications. Routers affected with this issue are the most common types of routers running DD-WRT.
Especially BitTorrent's DHT feature sends thousands of UDP packets that quickly overflow this table. These programs, by default, can require a lot of connections which could cause the routers' ip_conntrack table to get full. Usually the culprits are heavy P2P software like Emule, Bittorrent, uTorrent, Azureus, Shareaza or something similar. Slow web-interface, or cannot connect at all to web interface. The router becomes 'slow' over time, and restarting helps for a short time. Issues occur with many routers, including routers running DD-WRT, when using the router with heavy P2P applications. 13 Known issues with Applications/Operating Systems. 12 More Help: Web Traffic Daemon on v24x. 10 More help: Adjust your P2P applications. 6 Commonly mentioned out-dated solution & The modern equivalent. 4.1 Increasing Max Connection count beyond limits of GUI.
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