This article describes how to configure DNS servers differently for different user groups (or tunnels), configure it uniquely for each SSL VPN portal and then assign user groups a unique portal.SolutionConfiguring the DNS servers for individual VPN portal can be done only via the CLIFirmware version from V5.2 onwards.
# config vpn ssl web portalIf IPv6 is used with the SSL VPN connection, set the IPv6 DNS address as well on the firewall web portal.
set dns-server1 <ip4_addr>
set dns-server2 <ip4_addr>
# config vpn ssl web portalSpecifying the DNS server settings at the portal level is overriding those at the global level.If all SSL VPN portals have DNS settings configured, remove the DNS settings at the system level.
set dns-server1 <ip6_addr>
set dns-server2 <ip6_addr>
# config vpn ssl settingsDo it for the IPv6 as well,
# config vpn ssl settings