address 10.5.3.20 and sent to the Internal NAT Network by the router.

Line 1 shows a different option for the one−to−one address translation pairs. It lists IP address:port combinations such that a site on the Internet could access a Web server on the workstation at the NAT Network address of 10.5.3.11.

SHOW NAT MAP

This display was described at the end of the previous section, but several other details will be presented here.

Nat_2220> show nat map [ NAT Map Database ]

Total Number of Entries in NAT Map Database: 2

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

InternalExternal

LineNo. <IPaddress[/Mask or :Port]> −> <IPaddress[/Mask or :Port]>

1

−>

2

−>

As noted previously, individual sockets (IP Address and Port combinations) can be entered and displayed as one−to−one pairs.

For example:

1 −>

is entered to allow a workstation at the Internal NAT Network address of 10.5.3.11 to be seen as a Web server on the Internet (the External Network) at the IP address of 198.41.9.194.

The one−to−one pairs can also map ranges of IP addresses such as:

X −>

One important relationship between the NAT Map Database and the entered Internal and External Range(s) of NAT must be introduced here:

The Internal half of the one−to−one pair must be within the NAT Internal Range of the configuration, and the External half of the one−to−one pair must be within the NAT External Range of the configuration.

The NAT software will not use a one−to−one pair in the NAT Map Database which fails to meet the above criteria.

SHOW NAT SESSIONS

This command will display all active NAT Sessions that the NAT software is presently using to modify IP packets as they travel between the NAT Network and the External Network/Internet.

Nat_2220> show nat sessions

 

 

 

 

Active Map

Remote

Proto

Hashes

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

−−−−−−−−−−−−−−−−−−−−

−−−−−− −−−−−−−−−

 

Time Since: Created

Last Activity

 

 

−−−−−−−−−−−−−−−−−

−−−−−−−−−−−−−−−−

10.5.3.20:0

−>198.41.9.194:0

198.41.9.200:0

ICMP

221/907

 

 

124.33

114.33

 

Page 15
Image 15
3D Connexion 17621 setup guide Show NAT MAP, Show NAT Sessions

17621 specifications

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