[Server-devel] A quick networking question

George Hunt georgejhunt at gmail.com
Tue Feb 28 12:29:37 EST 2012


In Haiti, Adam and I have been trying to get a school server online.  We're
finding that volunteers are going through the school server to the internet
with their laptops, and he wants to turn that off, at least for now.

I've turned off /proc/net...ip_forward and verified that there is no
masquerade enabled in the iptables.

But that's not enough!!  I wasn't sure that the vpn wasn't setting up a
gateway, so I had him turn off the vpn.  But still the school server was
routing to the 3G usb modem dongle even with the vpn pipe closed down.

How does the school server act like a router?  It may be related to the ppp
connection and wdial configuration.  But I'm stumped.

But I'm trying to bring myself up to speed quickly because he really wants
to get it turned off.

Any ideas on what to try next?  I'm afraid the solution is going to be to
pull out the 3g dongle.

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