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Help with Regex for Web Exceptions

Brian1941 over 3 years ago

Hi,

I'm trying to create a regex for

3-213-29-168.836921650872.us-east-1.prod.rms.ring.devices.a2z.com

where everything to the left of .ring.devices.a2z.com is wildcarded. The url the Ring app is trying to get to is random up to the .prod.ms.ring.devices.a2z.com.

I can't for the life of me get anything to work except for ^[A-Za-z0-9.-]*\.a2z\.com/ and I want to narrow the regex to *.ring.devices.a2z.com.

Thanks,

Brian

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Top Replies

LuCar Toni over 3 years ago in reply to Brian1941 +1

Try a website to generate the regex for you: https://regexr.com/

0 LuCar Toni over 3 years ago

What do you try to do? HTTPS exception or malware scanning exception? Does this help? https://support.sophos.com/support/s/article/KB-000034481?language=en_US
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0 Brian1941 over 3 years ago in reply to LuCar Toni

HTTPS exception and that link helps a bit but since the url in question is very complex, it's above my head..
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0 Brian1941 over 3 years ago in reply to Brian1941

And I'm on an XG125w (SFOS 18.5.1 MR-1-Build326).
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0 LuCar Toni over 3 years ago in reply to Brian1941

Try a website to generate the regex for you: https://regexr.com/
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0 Brian1941 over 3 years ago in reply to LuCar Toni

I tried that website but it didn't work for me. Instead of the regex for the web exclusion https decrypt, I set an SSL/TLS rule for the source IP with specific ports used with that url to do not decrypt and that fixed it. I'd rather have a regex though since this is an IoT device.
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0 LuCar Toni over 3 years ago in reply to Brian1941

There are certain applications, not working with the https web exclusion due the fact how those apps are implemented.

See: https://community.sophos.com/sophos-xg-firewall/f/recommended-reads/118753/sophos-xg-firewall-v18-troubleshooting-problems-with-the-dpi-engine
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