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mmurray · Apr 20, 2003, 04:41 AM

I am connected to DSL via a graphite airport base station and a 1 gig powerbook G4. If I do traceroute at the command line I get the first entry as an IP (the IP the base station has had assigned to it by the DSL) after that all the entries are *********** . Its been suggested to me that the Airport base station is not passing the ICMP packets ?

Anyone got any thoughts about this ?

Thanks - Michael

ghporter · Apr 20, 2003, 09:03 AM

Is your personal firewall on? Any other filtering at your end? What are the settings in your Graphite base that may have an effect (such as port forwardings or blocks, etc.)? Can you connect directly to the DSL modem and get a different result? It does sound like the base isn't passing the packets, but there are a lot of things that could stop them.

mmurray · Apr 20, 2003, 09:09 AM

Originally posted by GHPorter:
Is your personal firewall on? Any other filtering at your end? What are the settings in your Graphite base that may have an effect (such as port forwardings or blocks, etc.)? Can you connect directly to the DSL modem and get a different result? It does sound like the base isn't passing the packets, but there are a lot of things that could stop them.

Hi GHPorter

My firewall is off on the mac and I don't think I have anything else filtering. I have no port forwarding set on the base station. I can plug in directly - I didn't think of that - I 'll try it thanks.

Michael

mmurray · Apr 20, 2003, 10:00 AM

OK when I plug straight into the DSL modem it works fine so it must be the base station.

Thanks - Michael

ghporter · Apr 20, 2003, 05:01 PM

On the Network tab of the Admin Utility, just unselect "Distribute IP Addresses," and everything else under it, then click on "Enable AirPort to Ethernet Bridging." That should do what you need.

mmurray · Apr 20, 2003, 06:58 PM

Originally posted by GHPorter:
On the Network tab of the Admin Utility, just unselect "Distribute IP Addresses," and everything else under it, then click on "Enable AirPort to Ethernet Bridging." That should do what you need.

Thanks - thats not going to be any good though as I need to distribute IP addresses for the 3 computers in the house.

Michael

ghporter · Apr 20, 2003, 08:30 PM

Oops. I had the impression that you had a router between the modem and the ABS, which would have made what I said make perfect sense. You're going to have to play with the settings on the Network tab to see where you lose your tracerout (and theoretically anything else that depends on ICMP), then weigh how serious the issue is day to day.

kampl · Apr 20, 2003, 10:17 PM

I have a question on top of the current question if no one objects. How specific is the ABS about filtering? I currently use a nonamer generic SOHO router/AP so I can't comment specifically on Apple's gear. My question is what do the default filters look like on an ABS (provide and scrub if you can)? Do you have to allow ICMP type 30 and 8 outbound and ICMP type 0 and 30 inbound specifically for this to work? I don't recall whether BSD systems use ICMP or UDP for traceroutes. I am however curious if there is a default policy in place in so far as filters and what that consists off. Thanks soo much.