Remote Access VPN Users Unable to Connect to Location 2 Servers.

[kristait]

Dear Checkpoint Community,

I am experiencing an issue with our VPN setup and would appreciate your assistance. The network topology is as follows:

• Location 1:

  • Checkpoint 1800 SMB
  • Local Users
  • Local Servers

• Location 2:

  • TP-Link Router
  • Local Servers

There is a site-to-site VPN established between Location 1 and Location 2, allowing seamless connectivity between the servers and users in these locations.

Issue: Users in Location 1 and the servers in Location 1 can successfully ping/connect to the servers in Location 2 through the site-to-site VPN. However, remote access (RA) VPN users connecting to the Checkpoint firewall at Location 1 are unable to connect to the servers in Location 2.

Steps Taken:

• Verified the RA VPN configuration and connectivity to Location 1 resources.
• Confirmed the site-to-site VPN is operational and allows traffic between Location 1 and Location 2 servers.
• Checked the firewall rules to ensure there are no blocks on traffic from RA VPN users to Location 2 servers.

Despite these steps, RA VPN users still cannot access Location 2 servers. I suspect there might be an issue with the routing or access rules specific to RA VPN users.

Questions:

1. Are there any specific settings required in the Checkpoint 1800 SMB to enable RA VPN users to access resources over a site-to-site VPN?
2. What additional configurations or troubleshooting steps should I consider to resolve this issue?

Any guidance or suggestions would be greatly appreciated. Thank you in advance for your help!

[the_rock]

I would say as long as vpn domains and rules are good, you should be fine. As far as troubleshooting, I would confirm the logs first, then maybe do some basic vpn checks, ie does it fail on phase 1 or 2? What do they see on the other side?

Andy

[kristait]

Hello @the_rock , Thank you for the response. please find attached logs screenshot for your reference.

[the_rock]

Do you see any dropped logs about it? Based on what you sent, I cant really "decipher" why this fails.

Andy

[kristait]

Not able to see any dropped logs when I try to ping from RA User to location 2 servers, attached the screenshot.

[the_rock]

Might be worth TAC case to check further, sorry, I dont work often with SMB : - (

[kristait]

The case is already open with the support team (SR Number: 6-0003950608) and has been for a few weeks, but they have not been able to assign an engineer yet.

[PhoneBoy]

Did you set the Remote Access Encryption Domain to include Location 2's resources?
This is done in VPN > Remote Access > Advanced
Click on the link in the sentence Local encryption domain is defined automatically according to topology...
Users will need to re-add the site to their client after this.

[kristait]

Hello @PhoneBoy,

I have added Location 2's resources to the Local encryption domain, but Remote Access users are still unable to access these resources. Please refer to the attached screenshot of the configuration and logs. As you can see, there are no drops.

[PhoneBoy]

Did the users delete and re-add the site on their end?
If so and this persists, you may need the TAC to investigate: https://help.checkpoint.com 

[kristait]

Hello @PhoneBoy, yes, while troubleshooting, I deleted the site and reconfigured it from both ends, but the issue still persists. I have also raised a TAC case (Case #: 6-0003950608), but they have not provided a proper solution.

[the_rock]

Keep us posted how it goes with TAC.

Andy