topic Re: GP disconnects in a set up with two ISPs when the primary link is down and users try to connect using the secondary link in GlobalProtect Discussions

GP disconnects in a set up with two ISPs when the primary link is down and users try to connect using the secondary link

FabioPiluso — Mon, 09 May 2022 13:58:22 GMT

Good morning,

in production we have a pair of PA-440 in HA (10.1.5). The firewalls have been configured with double VR as described in this article:

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClFiCAK

The firewalls are connected to two Internet links with two different Providers.

We have therefore configured two Portals and two Gateways in order to have two independent VPN connections that can be used simultaneously or when for example one of the ISPs is down.

We are experiencing the following problem:

if both internet links are up, then the two VPNs with GP are working fine.

If instead the primary link is down, then the VPN with the secondary link does not work, more precisely the authentication with the Portal is successful, but then the connection to the Gateway does not work.

We found the exact same behavior also on a PA-820 unit (10.1.4) configured in the same way with double VR and double ISP.

In the GP logs we have "gateway-switch-to-ssl" and on GP client we have the error "Failed to verify the certificate" regardless if the auth profile is username/password or client certificates.

Could you kindly help us figure out what is not configured correctly?

Thank you very much

Re: GP disconnects in a set up with two ISPs when the primary link is down and users try to connect using the secondary link

OtakarKlier — Mon, 09 May 2022 17:27:38 GMT

Hello,

That article is not for Global Protect but for site to site tunnels. I accomplish the same thing without using two VR's but I use OSPF and weighted metrics instead. I think for Global Protect, you would need to utilize something like multiple Gaterways:

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClU8CAK

Regards,

Re: GP disconnects in a set up with two ISPs when the primary link is down and users try to connect using the secondary link

FabioPiluso — Tue, 10 May 2022 06:41:26 GMT

Hi,

yes I read that article and my set up is as the second picture