Forum Replies

1. Hi Karthik,
   These terms can be quite confusing–I am still baffled why Cisco continues to use them! This is what has helped me …

   As you know, there are four possible varieties:

   1. Inside Local
   2. Inside Global
   3. Outside Local
   4. Outside Global

   Notice the left word is always either “Inside” or “Outside.” Think of this as the origin of the packet with respect to a NAT. Did the packet originate inside or outside the NAT?

   The word on the right is always either “Local” or “Global.” Think of this as where you have captured the packet you are looking at with respect to the

   ... Continue reading in our forum

2. Hi Jason,

   That’s right. You’ll need to create a match statement for each source network that should be translated (or create one statement that matches multiple networks).

   Your NAT router looks for the source IP address in the packets that it receives, if it matches an access-list entry, it will translate it.

   Rene

3. This been tested? How is host 1 which is on the 192.168.12.0/24 network going to reach the 192.168.23.0/24 network since it has no routes there? I can see it being able to reach 192.168.23.2 as its on the NAT router.

   However it will not reach 192.168.23.3 which is IP address of Web1

   Host1#ping 192.168.23.3

   Type escape sequence to abort.
   Sending 5, 100-byte ICMP Echos to 192.168.23.3, timeout is 2 seconds:
   …
   Success rate is 0 percent (0/5)

   //cdn-forum.networklessons.com/uploads/default/original/2X/6/65afc35c0cce4d0dc5c8c4b604286e10c00d0aa1.jpeg

   nor can you

   ... Continue reading in our forum

4. Hello Meihua

   The quick and simple answer is, you don’t have to. Why? Let’s take a look at an example.

   Let’s say you have the following three devices on the internal network with these parameters:

   • Host 1, IP address 10.10.10.10, communicating with a Web server on the Internet
   • Host 2, IP address 10.10.10.11 connected to an email server on the Internet
   • Host 3, IP address 10.10.10.12 connected to an FTP server on the Internet

   Al three are sharing the same external IP address of 201.12.12.12.

   Let’s say that Host 1 is the first to make a connection using a local

   ... Continue reading in our forum

5. Lazaros:
   Many thanks for your reply. It really explains to me. I like it so much.
   Thanks again.
   Melina