We've been deploying an ISE solution (1.1.0-665 version) in one customer and we have one doubt regarding Posture Assessment/Remediation. We're trying to check AV installation and definitions and this check is working fine but things get a little bit complicated when we try to remediate the machines.
In our Posture redirect ACL we don't redirect DNS, DHCP and ICMP to some hosts/servers as well as the necessary "posture traffic" (TCP/UDP 8905, 8906 and 8443 to the ISE IP) and redirect all HTTP and HTTPS traffic to the ISE in order to force Posture for users who need the Web Agent.
And this means that when Posture Assessment fails and we need to remediate client's machine we are going to have problems performing automatic remediation since our AV (McAfee), as well as many others, tries to access update servers using port 80 and that traffic will be redirected per Redirect ACL.
Is there a way to overcome this problem? Including update servers in our Redirect ACL deny lines is not an option, since there are too many and they are dynamic.
Can you help us with this issue? Thanks!