Server Installation 2021

[TerryJC]

Hamish,

Are you doing this from the VPN server? I fell foul of that. The server seems to block connections from itself to other devices. I was able to log in and ping from my PC.

[hamishmb]

Terry,

I tried both from the VPN server and from my PC - neither worked, just double checked.

[hamishmb]

For some reason I also get this error on my laptop when running sudo pistrong client stop:

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sudo: unable to resolve host hamish-IdeapadZ580: Name or service not known
Traceback (most recent call last):
  File "/usr/local/bin/pistrong", line 1296, in <module>
    gethostfqdn(pd, args)
  File "/usr/local/bin/pistrong", line 364, in gethostfqdn
    pd.vpnip = socket.gethostbyname(pd.hostfqdn)
socket.gaierror: [Errno -2] Name or service not known

And it won't disconnect from the VPN server.

[TerryJC]

I tried both from the VPN server and from my PC - neither worked, just double checked.

Hmm. That sounds like a problem on site.

[TerryJC]

For some reason I also get this error on my laptop when running sudo pistrong client stop:

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sudo: unable to resolve host hamish-IdeapadZ580: Name or service not known

That line usually occurs when the hostname being used for the login session is not written to all the places it should be; I've seen it on Pis.

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Traceback (most recent call last):
  File "/usr/local/bin/pistrong", line 1296, in <module>
    gethostfqdn(pd, args)
  File "/usr/local/bin/pistrong", line 364, in gethostfqdn
    pd.vpnip = socket.gethostbyname(pd.hostfqdn)
socket.gaierror: [Errno -2] Name or service not known

And it won't disconnect from the VPN server.

I presume that if the hostname isn't recognised properly, then gethostbyname will fail.

[hamishmb]

Yeah it's very strange because that doesn't happen until I run pistrong client start, and then there's lots of junk in my resolv.conf, but only on the laptop.

Fixing the resolv.conf doesn't help either.

Where was it you were getting support? I might ask there.

[TerryJC]

Hamish,

I can't quite remember where I saw it, but the problem seems to arise (on the Pi) when the hostname is changed in the file /etc/hostname and not in the file /etc/hosts.

[hamishmb]

Ah, that was it, thanks.

I guess something about pistrong/strongswan changing network settings causes the issue to arise. Seems to have happened since I migrated this Linux installation to a new system.