What VOIP ports to open and forward for 3CX

3CX needs the following ports forwarded to the VOIP server in order to work. The documentation does not by default describe which ones are meant to be TCP and which UDP so here they are:

• Port 5060 (TCP and UDP) – Used for SIP protocol transmission – must be a static mapping, no port translation
• Port 5090 (TCP) – Used for 3CX tunnel (if tunnel is enabled)
• Port 9000-9015 (UDP) – Used for RTP protocol for incoming and outgoing calls

If you are using windows XP firewall here is a shortcut to creating 18 firewall rules individually – copy the text below and save it as a .reg file then import it using regedit and all your rules will get created in one hit!

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\GloballyOpenPorts\List]
“5481:TCP”=”5481:TCP:*:Enabled:3CX PhoneSystem Web Server”
“5486:UDP”=”5486:UDP:*:Enabled:3CX Operator Panel Service”
“3389:TCP”=”3389:TCP:*:Enabled:@xpsp2res.dll,-22009″
“9000:UDP”=”9000:UDP:*:Enabled:RTP-9000-UDP”
“9001:UDP”=”9001:UDP:*:Enabled:RTP-9001-UDP”
“9002:UDP”=”9002:UDP:*:Enabled:RTP-9002-UDP”
“9003:UDP”=”9003:UDP:*:Enabled:RTP-9003-UDP”
“9004:UDP”=”9004:UDP:*:Enabled:RTP-9004-UDP”
“9005:UDP”=”9005:UDP:*:Enabled:RTP-9005-UDP”
“9006:UDP”=”9006:UDP:*:Enabled:RTP-9006-UDP”
“9007:UDP”=”9007:UDP:*:Enabled:RTP-9007-UDP”
“9008:UDP”=”9008:UDP:*:Enabled:RTP-9008-UDP”
“9009:UDP”=”9009:UDP:*:Enabled:RTP-9009-UDP”
“9010:UDP”=”9010:UDP:*:Enabled:RTP-9010-UDP”
“9011:UDP”=”9011:UDP:*:Enabled:RTP-9011-UDP”
“9012:UDP”=”9012:UDP:*:Enabled:RTP-9012-UDP”
“9013:UDP”=”9013:UDP:*:Enabled:RTP-9013-UDP”
“9014:UDP”=”9014:UDP:*:Enabled:RTP-9014-UDP”
“9015:UDP”=”9015:UDP:*:Enabled:RTP-9015-UDP”
“5060:TCP”=”5060:TCP:*:Enabled:SIP-5060-TCP”
“5060:UDP”=”5060:UDP:*:Enabled:SIP-5060-UDP”
“5090:TCP”=”5090:TCP:*:Enabled:SIP-5090-TCP”