You no NOT have to open the default port, it is recommended, but this can be changed in the .ini file as posted below;
Code:
Server
Name= Your Server Name
Phonetic= Your Phonetic
Comment= Your Comment
Port=3784 (Your port!!!)
Auth=0 (1 = on, 0 = off)
Duplicates=1
AdminPassword= Choose one to access admin.
Password= (If Auth = 1, set your password for ventrilo here.)
MaxClients=32 (If this is a cracked version you can have the total of 17 users or something.)
SendBuffer=0
RecvBuffer=0
Diag=0
LogonTimeout=5
CloseStd=1
FilterWave=0
FilterTTS=0
TimeStamp=0
PingRate=10
ExtraBuffer=0
ChanWidth=0
ChanDepth=0
ChanClients=0
DisableMaxClients=1
DisableQuit=1
VoiceCodec=0
VoiceFormat=1
SilentLobby=0
#SpamChat=1,1000,2
#SpamComment=1,1000,2
#SpamWave=1,1000,2
#SpamTTS=1,1000,2
[Intf]
# Examples:
#
# Intf=192.168.0.30
# Intf=external.mydomain.com
# Intf=internal.mydomain.com
# Intf=127.0.0.1
[Status]
# Examples:
#
# Intf=0.0.0.0
# Intf=127.0.0.1
# Intf=external.mydomain.com
Password=
ReplyInterval=500
FilterGen=127.0.0.1
# FilterGen=192.168.0.0/16
FilterDetail=127.0.0.1
# FilterDetail=10.0.0.0/8