Visitor III

Question

Fortigate as SSL VPN Client

Forum|Forum|9 months ago
August 27, 2025
1 reply
647 views

When i configure my fortigate lab as ssl vpn client to connect to the fortigate at office, why when ssl vpn connected then internal network under fortigate lab is not reachable to connect to the intenret by hostname? Actualy fortigate on the lab act as dns server also.

Traffic from lab to the internet is working fine, i can ping by ip (8.8.8.8) but the issue i can't ping by hostname.

FortiGate

SuperUser

So it is a DNS issue.

I guess you already checked this guide.

https://docs.fortinet.com/document/fortigate/7.4.2/administration-guide/508779/fortigate-as-ssl-vpn-client

Is your FGT LAB the DNS server for your internal network?

Can FGT LAB ping hostnames when connected to VPN?

Does the DNS server of the FGT LAB change when connected to VPN?

AEK

HS08Author

Visitor III

I have internal network in the lab and dns server in the FGT Lab is for lab network only.

The FGT itself can't ping using hostname when ssl vpn connected.

When FGT LAB connected to the ssl vpn the ip of dns server in not change.

SuperUser

Try check how dns request is routed once connected to VPN. Probably it is sent through the tunnel.

AEK