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Exchange SMTP relay managed with a text file.


Rossouw Eksteen

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Hi All, 

 

I have read thru a lot of solutions regarding SMTP relays and extended ACL's to limit source and destination IP's for relay's.
Is there a way to reference a text file with unique IP's that only allow these IP's to be used? 

 

We have a large environment and would like the Exchange admins to manage the file and not the NS config's.

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A Callout could be used and combined with responder policies to filter based on an externally maintained list - whether text file or database-based.  Which would work if you are controlling access via an lb vserver or cs vserver.

 

ACLS or responder policies with patternsets could be used, but would have to be maintained on ADC/NetScaler config.

 

https://docs.citrix.com/en-us/netscaler/12/appexpert/http-callout/use-case-filtering-clients-ip-blacklist.html

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