DD-WRT web interface not responding, restart httpd over ssh / telnet

DD-WRT is a third party developed firmware released under the terms of the GPL for many ieee802.11a/b/g/h/n wireless routers based on a Broadcom or Atheros chip reference design.  DD-WRT runs a small httpd server used for configuring the router (remember that opening WEB server to the world could be potential security problem). I am currently running DD-WRT v24-sp2 (07/22/09) vpn and occasionally cannot connect at all to the web interface after the router has been under heavy load or operating for a substantial amount of time. Rather than reboot the router the following commands can attempt to restart the web interface, executed via ssh or telnet:

Stopservice httpd

Startservice httpd