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Re: Routing Question

>>>>> "nr" == Nathan Ridge <ridgey@mackay.matilda.net.au> writes:

    nr> Im setting a broadband Internet connection on a Debian box, I
    nr> have the sat interface installed and working and can see the
    nr> icmp packets coming in from a ping on the sat interface using
    nr> tcpdump so im confident that side of things is working. I am
    nr> having a bit of trouble with the dialup.  Lets say our network
    nr> is, border gateway is and have a Cisco
    nr> access server on the and radius server on
    nr>  Now if I assign a static ip from a dialup pool
    nr> on our network, say I can ping out from the
    nr> dialup no problems, but the static needs to be that of the ip
    nr> address that is attached to the mac ID of the sat card so when
    nr> I change the static to, it connects to our
    nr> network, authenticates ok but cannot ping any machine except
    nr> for the access server  I know I must just be
    nr> missing a route somewhere, and I was assuming on the access
    nr> server, but when I also setup a NT server with the same setup
    nr> it seem to work fine, any ideas what I am doing wrong?

I'm not sure I've the picture completely clear (an ASCII scheme would
help); however, in my past experiences with satellite-based
connections, you have to make sure to disable the rp_filter on the
satellite interface:

echo 0 > /proc/sys/net/ipv4/conf/`your sat interface`/rp_filter

To see if this is necessary, try to:

echo 1 > /proc/sys/net/ipv4/conf/`your sat interface`/log_martians

and check your logs (on stock debian systems "martian" packets should
be logged in auth.log, I think).  If you see and martian packets being
blocked, I suggest you try to disable rp_filter on the sat interface.

By the way, what's your satellite provider?


Andrea Glorioso
Non e' abbastanza fare dei passi che un giorno ci porteranno ad uno
scopo, ogni passo deve essere lui stesso uno scopo, nello stesso
tempo in cui ci porta avanti.

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