Help me PING

Discussion in 'Tomato Firmware' started by GeeTek, Jan 21, 2007.

  1. GeeTek

    GeeTek Guest

    While trouble shooting an incomming connectivity problem, I discovored that I can't seem to get an incomming PING request to come in through the router. I have my PC in the DMZ. The PC's firewall is set to respond to pings. The PC responds to pings on the LAN. Using remote desktop to control an outside computer, I send a PING request to my own IP. If Tomato's "Respond to PING" box is checked, the remote computer receives PING replies from Tomato. If I uncheck the "Respond to PING", the replies stop, so I know it's not an internet routing / ISP problem. Why doesn't the DMZ setting pass the outside ping request to my computer and allow my computer to respond ?
  2. bogderpirat

    bogderpirat Network Guru Member

    because tomato only forwards tcp and udp packets in dmz or port forwarding mode, not ICMP requests, which ping uses.

    in other words: there is no way of pinging a LAN computer from outside the LAN; the internet.
  3. GeeTek

    GeeTek Guest

    Good enough. My actual application uses UDP, so I'll forget about pinging as a connectivity tool. Thanks for the reply !
  4. digitalgeek

    digitalgeek Network Guru Member

    Under advanced --> firewall there is and option: Respond to inbound ping.

    Although enabling this will cause the router to repond... not the PC

    why do you want to repond to an inbound ping? This lets a hacker know there is a network, and invites them to "take a look around", possibly even take information or leave some malicous code behind.
  5. GeeTek

    GeeTek Guest

    My project is setting up a syslog logger (KiWi) on Windows to accept system logs from an Ill m0n0wall captive portal in a distant city. My windows syslogger was not receiving anything, so I was trying to ping across the entire route to help me diagnose the snag. I normally do not leave ping response on, nor DMZ. It was just for testing. I did find another nice nugget in Tomato in the process. Tomato logger uses the same protocol, and when I pointed the Tomato logger to my test machine, KiWi lit up with all the router's traffic reports. Fascinating. I would have done it much sooner if I had known what it was all about. Still working on the original problem, but closing in fast. Thanks for asking !
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