DNS issues after implementing GeoBlock policy.

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L0 Member

DNS issues after implementing GeoBlock policy.

Hey guys, wanted to see if I can can get any input on this here - had to Geoblock one of  the countries for inbound/outbound traffic completely. Everything was fine until I found out that one of the employees started having issues with email delivery to the certain customer - "domain of sender address xxxx@mydomain.com does not resolve customer.email@customerdomain.com". Turns out mail servers of this certain customer (as well as other server infrastructure) located in that Geoblocked zone. Tried to identify range of their public addresses and allow inbound/outbound dns and smtp applications from my mail server and on-prem dns servers (just in case).

Issue still exists. No problems/issues with incoming emails from customer.email@customerdomain.com.

 

Will appreciate any help/suggestions.

Thanks. 


Accepted Solutions
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L0 Member

Re: DNS issues after implementing GeoBlock policy.

Issue resolved, problem resided in the policy with the wrong DMZ zone assigned.

View solution in original post


All Replies
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L6 Presenter

Re: DNS issues after implementing GeoBlock policy.

Query your traffic logs for denied traffic where your SMTP server is the source address.

Highlighted
L0 Member

Re: DNS issues after implementing GeoBlock policy.

Issue resolved, problem resided in the policy with the wrong DMZ zone assigned.

View solution in original post

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