Problem with Dynamic nat in gns3
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Author:  HugoAmaro [ Mon Jul 01, 2013 10:55 am ]
Post subject:  Problem with Dynamic nat in gns3

Hi all,

I seem to have a problem with my dynamic nat in gns3!

Here's the thing, i have a cisco 3725 router running a dynamic nat, when i configure it, it works as expected, but when i close the project and open it on the next day, the dynamic nat becomes a bit buggy.

I have the said router connected to my real internet connection, and i have another router connected to another cloud that is connected to my real internet connection.

When the problem appears, i can ping between routers, wich proves nat is working, but i cant ping neither the default gateway to the internet, nor anysite on the internet, unless i cahnge the pool addresses, and it as to be IPs that i never used in the pool, or it doenst work.

Any thoughts on what is happening? I'm running out of IPs to put int the nat pool.

Here is the configuration of the nat pool

ip nat pool PUBLIC_NAT_IPS netmask
ip nat inside source list NAT_ADDRESSES pool PUBLIC_NAT_IPS overload
ip nat inside source static

ip access-list extended NAT_ADDRESSES
deny ip
deny ip
permit ip any
permit ip any

Hope i could explain my problem well, and thank you in advance

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