<table border="1" cellspacing="0" cellpadding="5" style="margin-left:51px;"><tr><td>'''Tip'''</td><td>'''Explanation'''<br>''(command)''</td></tr><tr> <td>#'''Always start with the default iptables settings'''</td><td>::*When you install Iptables in CentOS it already has some rules predefined.:*You will always get the default rules if you restart the iptables service.</th></tr> <tr> <td>Obtain Default Gateway</td><th>route -n</th></tr> <tr> <td>Obtain DNS Server</td><td>nslookup</td></tr> <tr> <td>Obtain Hostname</td><td>uname -n</td></tr> </table>