[Server-devel] A quick networking question
holt at laptop.org
Tue Feb 28 12:49:34 EST 2012
On 2/28/2012 12:29 PM, George Hunt wrote:
> 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
> 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.
Interestingly the XS(*) creates an open path for any random non-XO
laptop to access the web, but seems to block non-web traffic like ssh
In any case, even if it's just forwarding port 80 and 443 (?) we just
cannot afford to become a free ISP here in semi-rural Haiti, given so
many visitors to our school especially.
(*) XS as set up by Tony Anderson early autumn 2011, and currently
maintained by George Hunt & I.
Help kids everywhere map their world, at http://olpcMAP.net !
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