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Forum Discussion

Richard__Harlan's avatar
Richard__Harlan
Historic F5 Account
Jun 15, 2006

DNS Lookup

Playing with the following rule trying to get DNS lookups working. Every time I hit the rule the name::response allways comes back empty. Any ideas what I am doing wrong. Thanks     when HTTP_RE...
application delivery
dev
devops
iRules
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Jan 19, 2010
hi Adrian,

 

 

For 9.4.2+ you can use the steps in SOL8437:

 

 

SOL8437: Configuring BIG-IP to resolve DNS hostnames

 

https://support.f5.com/kb/en-us/solutions/public/8000/400/sol8437.html

 

 

For older versions, you can check SOL3624:

 

 

SOL3624: Configuring DNS name resolution

 

https://support.f5.com/kb/en-us/solutions/public/3000/600/sol3624.html

 

 

And here are a few examples of using NAME::lookup and validating the response:

 

 

http://devcentral.f5.com/wiki/default.aspx/iRules/DestinationSnatUsingDNS.html

 

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=31&tpage=1&view=topic&postid=8551885545

 

 

SOL5299: The BIG-IP system does not forward DNS requests after configuring the BIND Forwarder Server List

 

https://support.f5.com/kb/en-us/solutions/public/5000/200/sol5299.html

 

 

Aaron