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w8888tLong
Beginner

Local site blocked - DNS lookup failed

                  Hitting our webpage from the inside is blocked; the policy trace shows Request blocked: Details: DNS Lookup fails

the local webpage is in the Custom URL Catagory- Allow group...

      

This fails when leaving the www off the front.   www.site.com works but site.com fails...

.site.com and site.com are in the custom URL catagory in an 'allow' group

this is also in the bypass filter

2 REPLIES 2
Chris Illsley
Participant

Hi,

I guess the obvious thing is check the DNS that your IronPort is set to use, if you log into the CLI and perform an nslookup does it give you a result back?

Thanks

Chris

Christian Rahl
Beginner

A large amount of sites in the world are unable to resolve domains that do not have www in the front. The easiest example is NASA.  Go to nasa.gov and it does not work.  www.nasa.gov does work.  This is due to the admins configuration.  However like chris mentioned I would confirm that your DNS is opperating correctly.

P.S.  The nasa test might or might not work.  Some browsers automatically change the nasa.gov to www.nasa.gov

Christian Rahl

Customer Support Engineer

Cisco Web Content Security Appliance

Cisco Technical Assistance Center RTP

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