Poor performance and dropped connections with Belkin ADSL2+ Modem (**UDP Flood to Host**)

Issue

Poor performance and dropped connections may be experienced when using a Belkin ADSL2+ Modem. In the Security Log of the administration page the following can be seen:

03/20/2008 14:31:03 **UDP Flood to Host** 172.16.1.10, 32768->> 195.169.124.101, 53 (from PPPoE1 Outbound)
03/20/2008 14:30:23 **UDP Flood to Host** 172.16.1.10, 32768->> 207.241.224.5, 53 (from PPPoE1 Outbound)
03/20/2008 14:30:19 **UDP Flood to Host** 172.16.1.10, 32768->> 192.150.94.200, 53 (from PPPoE1 Outbound)
03/20/2008 14:30:15 **UDP Flood to Host** 172.16.1.10, 32768->> 204.152.184.186, 53 (from PPPoE1 Outbound)

Resolution

The Stateful Packet Inspection (SPI) needs to be turned off:

In firmware version 6.01.06 this is not available from the menu so it is necessary to navigate to the following webpage once logged in:

<Router IP>/firewall_spi_h.stm

- Uncheck Intrusion Detection Feature | SPI and Anti-DoS firewall protection
- Click Apply Changes

Alternatively leave SPI and Anti-DoS firewall protection checked and:

- Uncheck Stateful Packet Inspection | UDP Session
- Click Apply Changes

Products

Belkin ADSL 2+ Modem with Wireless-G Router F5D7633au4A

Created: 20th March 2008
Updated: 20th March 2008


© 2005-2014 Jamie Morrison