Connect to local network fine, connect to internet - no go

[thundersmurf]

Probably something stupid I've missed.

I've a small home network behind a DLink router:

- Windows 2000 x 2
- Linux FC 3 (console install only)

The Linux-box is pretty much newly installed.

The problem is this: from the Linux machine I can ping everything in my network and even the gateway (DLink), DNS works (via the /etc/resolv.conf file) to something like www.yahoo.com, but I cannot get out on the Internet. I've tried both assigning the box a static IP and, when this failed, using router-based DHCP. To no avail, each and every connection to the Internet times out. I can even ssh into the Linux box from work.

Both Windows boxes get out fine and both can see the Linux machine.

This problem is aggrevatingly manifested each time I need to perform an up2date/yum/apt-get on this box.

Thanks in advance for any advice/direction you may have to offer.

ts

[starfish]

You may have iptables activated. The default FC3 iptables firewall allows inbound SSH and not much more. The fact that you can get in to the box from the Net shows your routing is OK.

Try the

# service iptables status

command and see if iptables is running. If the result is anything other than "iptables stopped", then it's running.

You can do some basic modifications to iptables using the lokkit utility. For a more comprehensive iptables tutorial check this link

Hope this helps.

[LinuxFreak]

Dear starfish,
Hello,

Try the

# service iptables status

command and see if iptables is running. If the result is anything other than "iptables stopped", then it's running.

little correction

# server iptables status

say "iptables stopped" then its means iptables is not running

Best Regards.

[thundersmurf]

Thx for the quick reply Starfish. With that command I get:

Firewall is stopped.

However, you pointed me in the right direction. When I flush the iptable rules, I can get out on the Internet. I only thought iptables had to do with incoming traffic.

And when I thought I was getting slightly above noob.

Thx again.

ts.

[starfish]

What command did you use to do the flush? From the command line or using the iptables command flush option?

I'd be interested to know.

[thundersmurf]

iptables --flush

Still weird tho, not exactly sure why I could not hit the great big fat Internet even with my (quite simple) iptable rules.

My main concern was I could not keep my openssh up-to-date with yum/up2date.

Am I (again ) missing something?