topic Re: Block Thunder VPN in app control in Firewall and Security Management

Block Thunder VPN in app control

emonteagudo — Thu, 20 Feb 2025 00:25:13 GMT

Hello,

Has anyone managed to block Thunder VPN?
I have tried to block STUN in apps, some IP's but I can't, that app doesn't exist in the application control yet.

CCSM Elite

Re: Block Thunder VPN in app control

Paul_Gademsky — Fri, 14 Mar 2025 00:14:27 GMT

Have you looked at tcpdump for tcp 53 for a host connecting to the thundervpn and seeing if it's really doing dns (if it is, is it using standard servers or unusual servers) if it's not look at the dns parameters and see if you can block it with an dns-ips setting.

Not sure it will succeed but worth looking at.

Re: Block Thunder VPN in app control

the_rock — Fri, 14 Mar 2025 01:30:29 GMT

I will test it in the lab Friday.

Andy

Re: Block Thunder VPN in app control

the_rock — Fri, 14 Mar 2025 19:07:38 GMT

So sorry for the delay, been busy day, just got chance to test now. I see in both R81.20 and R82, thunderVPN application is there and when I add to the rule, gets blocked, no issues.

Andy