Re: Fedora 7 post-installation problem - networking

Martin Gregorie <martin@xxxxxxxxxxxxxxxxxxx> wrote:
tinnews@xxxxxxxxxx wrote:
I have installed Fedora 7 on my system, the installation went pretty
smoothly and everything seems to work locally. However I have a
problem with connections to the outside world.

The new Fedora system is on a small home network that uses a Speedtouch
router for its internet connection. Other systems on the network can
still see the outside world without any problem (fortunately!) and
thats how I'm posting this.

The network uses static IP addresses, the new Fedora system is
192.168.1.1, the router is 192.168.1.254, the system I'm using to post
this is 192.168.1.5.

The fedora system behaves as if it hasn't got a default route set up.
It can connect to other systems on the local network but it can't
connect to most things in the outside world.

However:-

DNS works and as resolv.conf is:-
nameserver 195.74.102.146
nameserver 195.74.102.147
then DNS queries *are* getting through the router.

Some HTTP works though not much, I can get to Google for example.

I can't ssh to anywhere outside the local network. I don't seem to
be able to do anything else to outside either.

/sbin/route returns:-
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
default 192.168.1.254 0.0.0.0 UG 0 0 0 eth0
which looks OK to me.


Does anyone have any idea what might be wrong?


Double check (via the Network Sysadmin tool) that your gateway is
properly configured. Having that wrong or not configured will let you
see other computers on you LAN but not outside.

Try pinging your router and some of your ISP's servers. Try with a bare
IP address and with the hostname.

It turned out that it's a wierd router firewall incompatibility with
Fedora 7 (maybe other systems, I don't know). My Speedtouch router's
firewall was rejecting packets with the following error message (or
similar) :-

FIREWALL fast tcp seqnr check (1 of 2): Protocol: TCP Src ip:
192.168.1.1 Src port: 22 Dst ip: 193.128.168.194 Dst port: 51097

Disabling this particular firewall rule in the router has fixed the
problem.


--
Chris Green
.

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