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Routers using URLs instead of IP address.

Is it possible for routers to use URLs instead of IP addresses.
We have a URL that keeps changing IP address so we want to just unblock the URL.
Are there any routers that can do this?
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Marius Gunnerud
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Hi,  Yes, we just want to unblock for a certain URL.
Well, routers don't block URL's, or IPs for that matter, by default unless you have configured access-lists to do so.

Are you currently experiencing issues with this URL?  Is the URL trying to access your network or are your internal users trying to access the URL?
Hit, it's firewall router, sorry, should have made that clear.
It's hte firewall that we need to unblock the url.

All sites are blocked by default, we want to keep it that way.  We want to allow access to only one site, however that site's URL changes sometimes./
What firewall are you currently using?

With Cisco Firewall (and probably some others), you can do this by using regular expressions.
I use a Cisco ASA 5505.
Here is a good link to get URL filtering set up.  I am a little unsure how this will work with access-lists, so you may have to change your access list to permit any any and then for the inspect allow the websites you want and drop everything else using the policy maps instead of access lists.

https://supportforums.cisco.com/docs/DOC-1268
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