The ports become open/listening by an application running on them. If the application is not running and/or dying when you try to start it then the ports are closed. ss -lnp | grep -E 'tcp|udp' will show you what programs are handling what ports. If nothing is on a given port (it is not reported) then there is nothing to answer and the port is closed. On Wed, Oct 11, 2023 at 5:19 PM Patrick Dupre <pdupre@xxxxxxx> wrote: > > Hello, > > I am trying to use remmina > > nmap -v -n -Pn -p5900-5910 localhost > > Starting Nmap 7.93 ( https://nmap.org ) at 2023-10-11 23:58 CEST > Initiating SYN Stealth Scan at 23:58 > Scanning localhost (127.0.0.1) [11 ports] > Completed SYN Stealth Scan at 23:58, 0.01s elapsed (11 total ports) > Nmap scan report for localhost (127.0.0.1) > Host is up (0.000013s latency). > Other addresses for localhost (not scanned): ::1 > > PORT STATE SERVICE > 5900/tcp closed vnc > 5901/tcp closed vnc-1 > 5902/tcp closed vnc-2 > 5903/tcp closed vnc-3 > 5904/tcp closed ag-swim > 5905/tcp closed asmgcs > 5906/tcp closed rpas-c2 > 5907/tcp closed dsd > 5908/tcp closed ipsma > 5909/tcp closed agma > 5910/tcp closed cm > > Read data files from: /usr/bin/../share/nmap > Nmap done: 1 IP address (1 host up) scanned in 0.04 seconds > Raw packets sent: 11 (484B) | Rcvd: 22 (924B) > > > The ports are closed. Should not I open them? > If yes how? > > When I do > > vncviewer -via pdupre@themachine :1 > I get > Thu Oct 12 00:00:02 2023 > Parameters: Failed to read line 18 in file > /home/pdupre/.vnc/default.tigervnc: Unknown parameter > Parameters: Failed to read line 19 in file > /home/pdupre/.vnc/default.tigervnc: Unknown parameter > main: FullScreenAllMonitors is deprecated, set FullScreenMode to 'all' > instead > pdupre@themachine's password: > > The connection was dropped by the server beforethe session could be established > > nmap -v -n -Pn -p5900-5906 themachine > Host discovery disabled (-Pn). All addresses will be marked 'up' and scan times may be slower. > Starting Nmap 7.93 ( https://nmap.org ) at 2023-10-12 00:03 CEST > Initiating Connect Scan at 00:03 > Scanning themachine (xxx.yyy.ttt.rrr) [7 ports] > Completed Connect Scan at 00:03, 3.00s elapsed (7 total ports) > Nmap scan report for themachine () > Host is up. > > PORT STATE SERVICE > 5900/tcp closed vnc > 5901/tcp closed vnc-1 > 5902/tcp closed vnc-2 > 5903/tcp closed vnc-3 > 5904/tcp closed ag-swim > 5905/tcp closed asmgcs > 5906/tcp closed rpas-c2 > > Read data files from: /usr/bin/../share/nmap > Nmap done: 1 IP address (1 host up) scanned in 0.03 seconds > > > > > =========================================================================== > Patrick DUPRÉ | | email: pdupre@xxxxxxx > Laboratoire interdisciplinaire Carnot de Bourgogne > 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE > =========================================================================== > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx > Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
