Re: open port

[Patrick Dupre]

> ...
> > Now you have it running, so the next step is to figure out how to ask
> > firewalld to allow connections to that port.
>
> I would first verify that Xvnc is not only listening on localhost.
>
> Two ways, From euripide (the "remote", ie: the server)
>
> nmap
>
> nmap -v -n -Pn -p5900-5906 euripide

Starting Nmap 7.70 ( https://nmap.org ) at 2020-02-16 11:46 CET
Initiating Connect Scan at 11:46
Scanning euripide (193.52.235.60) [7 ports]
Discovered open port 5901/tcp on 193.52.235.60
Completed Connect Scan at 11:46, 0.00s elapsed (7 total ports)
Nmap scan report for euripide (193.52.235.60)
Host is up (0.00037s latency).
Other addresses for euripide (not scanned): fe80::de89:7b2c:9cf1:d1c9

PORT     STATE  SERVICE
5900/tcp closed vnc
5901/tcp open   vnc-1
5902/tcp closed vnc-2
5903/tcp closed vnc-3
5904/tcp closed unknown
5905/tcp closed unknown
5906/tcp closed unknown

Read data files from: /usr/bin/../share/nmap
Nmap done: 1 IP address (1 host up) scanned in 0.03 seconds
> or lsof
>
> lsof -p $(pidof Xvnc) | grep LISTEN

Xvnc    5308 pdupre    6u     IPv4             145831       0t0      TCP *:5901 (LISTEN)
Xvnc    5308 pdupre    7u     IPv6             145832       0t0      TCP *:5901 (LISTEN)
>  Should give something like
>
>     Xvnc <snip> TCP *:5901 (LISTEN)
>
>  and not:
>
>     Xvnc <snip> TCP localhost:5901 (LISTEN)
>
> You can also check the arguments given to Xvnc by vncserver:
> ps -wp $(pidof Xvnc)

PID TTY          TIME CMD
 5308 ?        00:00:00 Xvnc
> PS: If you have SSH access, I suggest to restrict Xvnc to localhost
>     and use:
>     vncviewer -via euripide :1

vncviewer -via euripide :1 vncviewer -via euripide :0

donne le meme resultat:
ssh: Could not resolve hostname euripide.u-bourgogne.fr:1: Name or service not known
ssh: Could not resolve hostname euripide.u-bourgogne.fr:0: Name or service not known
> See the comments in vncserver@.service

Comment ?
> --
> francis
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