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Exception for IPS/SNORT when transferring files to/from local lan to/from VPN client

Jay Jay

I notice when copying files to/from a remote client connected with SSL (openvpn) or l2tp/ipsec top reports high snort cpu. 

I've been trying to figure out how to properly formulate an exception but have been unsuccessful.

Internal_port2 = local lan (behind utm)
VPN Pool (SSL) = IP pool assigned to openvpn client

I can turn off ips entirely which will disable any snort scans but I'd like to leave it enabled but ignore this type of traffic.

Of course nothing shows up in the ips log because it's not detecting anything intrusive/malicious.  Unlike firewall port blocking I've found no way to observe what it's actually scanning so I can apply the proper exception.

 

Thanks!



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  • 0 in reply to BAlfson

    Cifs reversed is the same as cifs but with the source/destination reversed.

    I just tested this again, and it's working!@#

    No changes have been made in the exception rule or definitions. 

    The only recent change was a system reboot this morning.  While probably not required I'll typically reboot it about once a month.

    We'll have to wait and see if this sticks after a few weeks or later in the month.

    As odd as it sounds i've seen system reboots fix all sorts of odd behavior in other platforms. 

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