How would I open a particular port, in Comodo Firewall, for SocnicWALL VPN

I’m running a new install of the ;atest SonicWALL Global VPN client, on my WinXP Pro (SP3) laptop. How would I go about opening UDP ports 67 and 68, in order for the Virtual Adapter in GVC to acquire DHCP lease?

Looking forward to any and all feedback; thanks in advance. :SMLR