Why doesn't the transmission web interface open?

Question

linux

Good afternoon.
There is an hp microserver with CentOS on board.
Tried to install transmission with web form but it just doesn't work.
I put both on a clean system and on the old one. I did not experiment much in settings.json:

"rpc-enabled": true,
"rpc-password": "password",
"rpc-port": 9091,
"rpc-url": "/transmission/",
"rpc-username": "user,
"rpc- whitelist": "192.168.0.*",
"rpc-whitelist-enabled": true,

+ folder downloads changed
the service starts without problems and errors. There is nothing at the server address
ip_address:9091/transmission/web . Apparently the web simply does not start.
Could it be iptables?
I've been poking around with the problem for half a day and can't figure out what's wrong.
Thank you.

Answer 1

To see if anyone is hanging on port 9091
netstat -ln | grep 9091
You can check the availability of the desired port like this
on the host, execute netcat -l 9091 (starts a "server" that receives data on port 9019 and outputs to the console)
On some other machine from where you need to look netcat _host_address_ 9091
Write something. It should come to the host.
You can also put a console browser, such as lynx, and check the web face on the localhost.
Just check ip_address:9091/transmission/