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cisco nat, dynamic ip from isp

Hi!

I think I understand the cisco NAT-PAT thing, but I try to manage this at my office with a 1841 router, and I don't know how to solve, that my ISP uses dynamic IP-s, and every 24 hours the public IP address is changing.

Must I change the router config every day to use NAT-PAT?

Thank you and sorry for the noob question!

Gergő from Hungary

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1 ACCEPTED SOLUTION

Accepted Solutions
Purple

cisco nat, dynamic ip from isp

Hi,

No, just use the NAT overload feature like this:

ip nat inside source list 1 interface g0/0 overload

where int g0/0 is your external interface with the DHCP address.

Regards

Alain

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Don't forget to rate helpful posts.
3 REPLIES
Purple

cisco nat, dynamic ip from isp

Hi,

No, just use the NAT overload feature like this:

ip nat inside source list 1 interface g0/0 overload

where int g0/0 is your external interface with the DHCP address.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.
New Member

cisco nat, dynamic ip from isp

Hi Alain!

Thank you for your reply. I forgot to mention, that my ISP needs a pppoe authentication. Does's this information change your answer? I need the replace the interface g0/0 to Dialer1?

Thank you!

Purple

cisco nat, dynamic ip from isp

Hi,

Yes you're correct.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.
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