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Posts tagged NAT
MPLS and BGP Lab Guide, Part 4
Dec 16th
This is the fourth post in the series, the goal of the series is to provide a guide for the MPLS and BGP Lab I posted awhile back. The labs consists of MPLS VPNs and BGP along with some OSPF, NAT, IPSEC and GRE exposure. I will be posting the files needed for this lab at the bottom. Here’s the topology and the requirements:
(click image for fullsize)
Requirements:
Internet
* The two Internet routers should serve as transit ASes. No other routers should permit transit traffic.
* Internet sites (modeled by loopbacks) should be accessible by all lan IPs.
MPLS and BGP Lab Guide, Part 3
Dec 9th
This is the third post in the series, the goal of the series is to provide a guide for the MPLS and BGP Lab I posted awhile back. The labs consists of MPLS VPNs and BGP along with some OSPF, NAT, IPSEC and GRE exposure. I will be posting the files needed for this lab at the bottom. Here’s the topology and the requirements:
(click image for fullsize)
Requirements:
Internet
* The two Internet routers should serve as transit ASes. No other routers should permit transit traffic.
* Internet sites (modeled by loopbacks) should be accessible by all lan IPs.
NAT Tutorial
Jul 27th
In this article we will configure semi-basic NAT with a Cisco router. This post will be useful for CCNA studies. First we’ll create an ACL specifying which addresses we want to be NATed, then we apply our NAT statement to the router (enabling NAT), then we tell the interfaces whether they are inside or outside. I will also throw in a little “port forwarding” as a bonus.
Here’s our NAT ACL:
ip access-list extended NAT permit ip 192.168.0.0 0.0.255.255 any |
This ACL is permitting ANY 192.168.x.x address to be NATed. I’m doing it this way because I have a lot of subnets at home and it’s easier than a line for each. Most people would probably use something like this:
ip access-list extended NAT permit ip 192.168.10 0.0.0.255 any |
Next we turn NAT on, we do it with this NAT statement:
ip nat inside source list NAT interface FastEthernet 0/0 overload |
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