Forum Discussion

Mulham_171271's avatar
Mulham_171271
Icon for Nimbostratus rankNimbostratus
Nov 28, 2016

ASM: changing hostname for whitelisted URL's

Hi,   We have ASM policy already in place for site-X.mycompany.com, we have site-Y that hosts the same application but with a different hostname site-Y.mycompany.com   Is there a way to export ...
application delivery
ASM Advanced WAF
Hannes_Rapp_162's avatar
Hannes_Rapp_162
Icon for Nacreous rankNacreous
Nov 28, 2016

You can export, and re-use

The reason for that is if you take a closer look at the meaning of "URL", in BigIP ASM it's really an equivalent to HTTP Path. This means your allowed/disallowed URL definitions are guaranteed to continue working after a DNS update.

  • From the perspective of 'Illegal URL' violation, it doesn't make any slight difference if you update DNS from 
    foo.bar.com
    to 
    bar.foo.com
    .

Here's another example:

  • True URL: 
    https://devcentral.f5.com/questions
  • BigIP ASM URL: 
    /questions
Hannes_Rapp_162's avatar
Hannes_Rapp_162
Icon for Nacreous rankNacreous
Nov 28, 2016

Assuming your case weren't so simple, you could always export the policy as XML, and do a 'search & replace all' on the file. Once done, you just import the modified XML as a new policy. Good luck!