port 88 open using Air?

[retiredpilot 6]

Strange thing noticed:  I have several OS's on a machine running 7 Pro.  When I use 7 and Comodo firewall going straight through only my ISP I get a full Stealth rating at grc dot com.  However I also notice that while I am on 7 Pro and connected to Air VPN the results are different.  When I run the test at grc I find that port 88 is OPEN.  My 7 OS is different than the one where I don't use Air.  Both are full disk encrypted and the one using Air has the firewall rules as described in this forum.  Either my ISP is blocking 88 and when I am connected via Air its not being blocked, or Air may be using 88.  I am examining if there is a security issue I should address.  As a further note;  when I am running my linux virtualbox VM on the same host (used with Air) the grc test from within the VM shows 88 closed.

 

I wanted to ask Admin/Staff if I should just close 88 via firewall rules or if I need to leave this alone?  Would VirtualBox and use of VM's have somehow opened port 88?  Any help or suggestions appreciated.

[Staff 9751]

Hello,

 

packets to exit-IP:88 are not forwarded to the VPN. That port is used for services on the exit-IP address, outside the VPN.

 

Kind regards