IP Subnetting, Troubleshooting,
and NAT
NETWORKING ESSENTIALS
CHAPTER 8
FALL , 2012
Troubleshooting IP Addressing
Can’t reach a server? Follow these steps:
 1.
Ping…
 2.
Ping…
 3.
Ping…
 4.
Ping…
 5.
Still having trouble? It’s probably…
DOS Troubleshooting Commands
 ping
 traceroute
 tracert
 arp -a
 ipconfig /all
NAT
 Use when you need to connect to the Internet, but…
 Use if you change to a new…
 Use if you need to merge…
NAT Advantages and Disadvantages
Advantages
Disadvantages







Types of NAT
 Static NAT –
 Dynamic NAT –
 Overloading –
NAT Names
 Inside local –
 Outside local –
 Inside global –
 Outside global –
How does this wacky NAT-thing work?
How does this wacky NAT-thing work?
Oh yeah… CIDR
 A shortcut for listing a…
 192.168.0.1 , 255.255.255.0
becomes
 192.168.0.1
Alles Gutes!