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Re: Server cannot connect to the outside world



Laura Speck writes:

I've edited the appropriate files in /etc/sysconfig/network-scripts/

Until you are familiar with manual network configurations, it's always better to run system-config-network.

ifconfig shows the interfaces having the proper ip addresses. I can
connect to the machine on the internal ip, from other machines in the
rack that are on the same range of 192.168.1.xxx addresses. I cannot
seem to connect to it via the external ip though, even from machines
that are on that same subnet, in the same rack. When I try to ping
google's ip address from this machine, I get:
connect: Network is unreachable

Your default route may not be set up. Run 'route -n' and see what your routing table is like. /etc/sysconfig/network should have "GATEWAY=[ip]" giving your external router's IP address.

Also, I was told by the person who set up the redhat machines, that he
had to run this command to get everything working on the redhat
machines:
# ethtool –s eth0 speed 100 duplex full autoneg off

But when I ran this command on the interface I was connected to one of
the machines on, it totally killed the connection and now I can't
connect to it at all.. what's that all about?

That the person is not playing with the full deck. A good rule of thumb to follow is that if you do not have an satisfactory explanation of what the problem is, and how exactly running the given command will solve the problem, then the chances of solving the problem by running the command are rather slim.



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