CentOS

if you can nslookup www.google.com and can ping it, you have network connectivity. If you can't bring up something in a browser it might be the firewall. You might try using cruk and or wget to see what they show.

Google Postfix and SASL and TLS. You have to set both of these up. http://www.postfix.org/SASL_README.html http://www.postfix.org/TLS_README.html Take your time and remember that postfix has two sides (smtpd - the server) and (smtp - the client). To talk to verizons mail realy, you need to be lookin...

If you have two nics eth0 and eth1. If eth0 is attached to the public network, you have to put the ip address of the upstream gateway as the defaut route. then you have manually a route for your internal network. make sure that iptables is not doing something silly or that selinux is not doing somet...

create whatever config file you need and put it into /etc/modprobe.d

It is in the EPEL repo

All boxes have the localhost name associated with 127.0.0.1 This is normal

not eth1:0 it would be eth1:1

You have to enable either network or NetworkManager

chkconfig --levels 2345 network on

service network start

You need to either enable network or Network manger They are all off. Don't enable both.

chkconfig --levels 2345 network on

service network start

You don't have your ethernet set up. ifconfig only lists the "lo" device.