topic Re: CloudGuard - Remote Access SSL-VPN Connectivity Issues. in Firewall and Security Management

CloudGuard - Remote Access SSL-VPN Connectivity Issues.

chethan_m — Wed, 31 May 2023 09:25:40 GMT

Hi Everyone,

I'm practicing deploying CloudGuard Network Security Solution on Azure Public Cloud and I'm facing connectivity issues with setting up Remote-Access VPN.

On the web-browser, I can see that the gateway is resetting the connection: "It looks like <GW-Pub-IP-Addr> closed the connection -> ERR_CONNECTION_CLOSED"

The Architecture:

CloudGuard Single Gateway deployed with 2 interfaces: eth0 and eth1. The static public IP is assigned to eth0:1 sub-interface.
The SMS is on an on-premise VMware Workstation.
IPsec VPN and Mobile Access VPN blades are enabled on the gateway.

I followed this SK article: Check Point Reference Architecture for Azure. The best practices section speaks about the IPsec VPN, Link Selection Source IP Address settings, where it says to select the private IP address of the gateway's external interface to ensure that the Gateway in the Azure cloud sends encrypted traffic with the source address set to its private IP address.

Is there anything similar to do for Remote Access VPN configuration as well?

Anti-Spoofing is disabled on both external and internal interfaces.
I suspected there might be a conflict with Web-UI and changed the web ssl-port from 443 to 4434. Even then the issue persists.

Could anyone help me to know what should I be troubleshooting for, please?

Thank you!

Re: CloudGuard - Remote Access SSL-VPN Connectivity Issues.

G_W_Albrecht — Tue, 30 May 2023 06:57:47 GMT

Did you read https://sc1.checkpoint.com/documents/IaaS/WebAdminGuides/EN/CP_VMSS_for_Azure/Content/Topics-Azure-VMSS/Overview.htm#Remote_Access_VPN_..2 ?

Re: CloudGuard - Remote Access SSL-VPN Connectivity Issues.

chethan_m — Tue, 30 May 2023 07:42:11 GMT

Yes, this guide is specifically for Scale Sets. Which makes use of the Azure Functions to return the active member's public IP address to the connecting client.

In case of single gateway, the public IP address associated with the external interface will be used for VPN. And for HA the cluster's public VIP address will be used.

Reference Architecture: Check Point Reference Architecture for Azure

In my case, it's not about the network reachability but the gateway is refusing the connection for "https://<gateway-public-ip>/sslvpn" URL.

Thank you!

Re: CloudGuard - Remote Access SSL-VPN Connectivity Issues.

G_W_Albrecht — Tue, 30 May 2023 08:34:56 GMT

Better contact CP TAC - MAB is supported with Azure, but i did not find any special configuration hints. Changing the WebUI port should not be needed as MAB uses the path /sslvpn for access (MultiPortal feature).

Re: CloudGuard - Remote Access SSL-VPN Connectivity Issues.

chethan_m — Wed, 31 May 2023 09:26:23 GMT

The solution to my problem was found here (sk115732): Unable to connect to Gaia Portal on port 443 (checkpoint.com)