Service already configured - Port 8090

Question

I cannot for the life of me create a WAF rule on Port 8090. I've done a full export of the config, opened entries.xml and searched for 8090 and it's not in use anywhere. 
 I've checked and it's not a reserved port, although from memory it's the captive user portal and I can't find anywhere where I can set that port, so is it a reserved port but not listed? 
 https://docs.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/SystemServices/ReservedPorts/index.html 
 
 How can I find out what's causing this conflict?

Erick Jan · Accepted Answer

In Addition, the latest documentation for v21 
 
 Reserved ports

Mayur Makvana · Answer

Hello, 
 I just found the correct document which has this information added: 
 https://docs.sophos.com/nsg/sophos-firewall/20.0/help/en-us/webhelp/onlinehelp/AdministratorHelp/ServicesAndPorts/ReservedPorts/index.html#list-of-reserved-ports

Mayur Makvana · Answer

Hello, 
 Yeah, the document which you were referring was out of date. Certainly Captive portal port is reserved for the authentication and hence cannot be used with WAF. 
 Thank you for sharing the update.

Service already configured - Port 8090

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