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IP Reputation Checking?

Does Sophos XG do IP source address reputation scanning for all inbound traffic irrespective of port/proto?

 

I ask because my net is like this  inet NAT router<>sophos XG in bridgemode <>cujo in bridge mode<>rest of network

And the cujo is blocking MANY inbound attempts as probing my NAT'd ports based on IP reputation, I would expect the cujo to see nothing and XG to block these (given the price differential).

I see in docs that XD does IP reputation scanning for SMTP/S - not sure if it is for anything else.

This is my inbound rule, incase someone can advise if i forgot to turn something on.

 

Rule

Accept any service going to "LAN" zone, when in "WAN" zone, and coming from any network, scan for malware then check with Sandstorm and log connections, then apply IPS policies

Source & Schedule
WAN

Source Networks and Devices : Any
During Scheduled Time : All the Time

Destination & Services
LAN

Destination Networks : Any
Services : Any



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  • Hi Alex, 

    As you are comparing with the enterprise-grade solution with personal home protection. 

    The bad IP reputation would cause numerous false positives and this would not mean that your system will be infected.  The XG would protect you from real-time threats, this would include malware attack from the website if infected and also mail communication.  

    Our AV will scan the page for any malicious code and if detected it would be blocked. Now if there is a treat detected it will be blocked by our IPS policy. As your traffic would traverse through LAN to WAN. You may need only LAN to WAN rule only, as for WAN to LAN is only needed if you wish to communicate from outside zone to internal network which is not recommended unless you have an MPLS line configured as a WAN port.

    The IP reputation is restricted to SMTP and the websites were not affected by bad reputation on XG.e.g. If a Web server is infected that IP may be blacklisted but that Public address may have a Web server which will be blocked by IP reputation even though it's not infected. This is considered a False positive. Another example would arise if the actual threat is detected but the IP address is not blacklisted, this would result with the False negative. 

    The RBL would decide if the host address is blacklisted or not if you would check the mxtoolbox website you would also need to check the reason the host address is blacklisted. 

    In XG, you would change the IPS policy and even create your own based on the Signature you wish to allow/deny. Even have a customized web filter and application control. 

    If you wish to enable such option to enable  IP reputation then you may vote for a feature request.  We would be happy if you would participate to improve our product as per your requirement. 

    http://ideas.sophos.com/forums/17359-sophos-utm/suggestions/7114816-make-rbl-list-update-possible-via-pattern-update-o 

  • Thanks Aditya, that's great context and confirms what i was seeing - i.e. nothing wrong with the rules;  Also i guess you guys calling 'XG Home' gave me some over expectations.  Remeber i had never used sophos or any UTM product before that. 

    I was only using the sophos as a tertiary form of protection mainly for fun and to learn and to do reverse publishing (are you guys gonna support websockets?) and moved it to be secondary as a test, i will just move it back to being tertiary if i keep it.

    Now i need to figure out a) why the XG would have been downloading 2Mbps a second b)why i don't see the 6GB of RAM and c) how to stop the DNS false positives.  If i can figure that out i will keep if not i will nix it.

    Thanks for your help

     

    alex

Reply
  • Thanks Aditya, that's great context and confirms what i was seeing - i.e. nothing wrong with the rules;  Also i guess you guys calling 'XG Home' gave me some over expectations.  Remeber i had never used sophos or any UTM product before that. 

    I was only using the sophos as a tertiary form of protection mainly for fun and to learn and to do reverse publishing (are you guys gonna support websockets?) and moved it to be secondary as a test, i will just move it back to being tertiary if i keep it.

    Now i need to figure out a) why the XG would have been downloading 2Mbps a second b)why i don't see the 6GB of RAM and c) how to stop the DNS false positives.  If i can figure that out i will keep if not i will nix it.

    Thanks for your help

     

    alex

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