I just upgraded Redhat 7.3 to Redhat 8.0 last night and now my box is having issues getting (and staying) on the Internet.
Here is what happens (bear with me, this stuff (routing) is new to me):
- Box boots up, 2 nics (eth0 - public, eth1 - private) activated.
- Try to ping a public site, the ping reports that it is using the private nic to communicate.
- Obviously get an unreachable error. (Sorry, I don't have a screen shot of what exactly happened).
- Ifdown eth0 and eth1
- Ifup eth0
- Internet works fine.
- Ifup eth1
- Nothing works
- Ifdown eth1
- Try to reach Internet (ping, web). "No network" type errors.
- Ifdown eth0
- Ifup eth0
- Internet works fine.
The firewall I use (iptables - gShield) is turned off during all of this. As far as I can tell, the RH firewall is off too. I'm not too sure though because in the settings listed in Gnome, I set it to "no firewall" every time, but when I open the config window again, it says that it is at high.
Reboots do not fix the problem. If I boot with only eth0 activated a boot, the above still happens. I have access to the internet until I enable eth1.
Since I'm running NAT for my private network, I kinda need to have eth1 up...
How do I tell RH8 to use the public nic for Internet requests when the two cards are active?
TIA!
Andy