Some closed ports (like 5055, ...)
Does NMAP check all ports in range? I would recommend to check with netstat or just try to connect to the port.
I have the same problem with TracCar on Synology.
I use port 55000-55099 (default for Synology installation of TracCar).
If I use the portchecker https://www.traccar.org/port-check/ all ports execpt 55055 are open. I'm pretty sure I selected all protocols (execpt the first dubug one) when I installed CarTrac on the Synology Server.
Can I manually enable/open the port in some config file? How?
I opened the ports in firewall and its working, but nmap doesn't show them.
I tried telnet and it works, but I dont understand why nmap shows some ports and other not.
I think that I am wrong using nmap, but always work for me.
The portchecker works well. ( https://www.traccar.org/port-check/ )
Sorry by the question.
I guess NMAP checks only well known port by default. Port 5055 might not be one of them.
As for Synology, you should be able to enable ports from the config. Take a look at default Traccar config for example:
https://github.com/tananaev/traccar/blob/master/setup/unix/traccar.xml
Thank you. I found the missing TRUE for port 55055 in the config file for my Synology setup.
I installed traccar following the instructions of the documentation.
If I do an NMAP to localhost, I see this:
5001/tcp open commplex-link
5002/tcp open rfe
5003/tcp open filemaker
5004/tcp open avt-profile-1
5009/tcp open airport-admin
5030/tcp open surfpass
5033/tcp open unknown
5050/tcp open mmcc
5051/tcp open ida-agent
5054/tcp open rlm-admin
5060/tcp open sip
5061/tcp open sip-tls
5080/tcp open onscreen
5087/tcp open unknown
8082/tcp open blackice-alerts
But, why some ports like 5055 are closed?
Can anyone help me?