Forum / NoMachine for Mac / NX server startup error: Can’t bind localhost
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August 25, 2020 at 08:26 #29124npatelvParticipant
Hi All,
I am trying to install NoMachine Server on a Mac with Catalina (10.15.6) so I can connect to it from other clients.
Installation seems to complete successfully, however, the server will not start.
Looking at nxerror.log, I see the following errors:
Io/Io: WARNING! Can't bind host 'localhost' to any IP family.
Io/Io: WARNING! Can't resolve IP host 'localhost'.
Io/Io: WARNING! Error is 49, 'Can't assign requested address'.OpenSocketToListen: ERROR! Unsupported address family
My hosts file has localhost defined:
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhostBecause of the binding errors, nxserver fails to start, and thus, NoMachine will not accept incoming connections.
Any suggestions on what to try next?
Thanks in advance!
August 26, 2020 at 11:01 #29157BritgirlKeymasterVery strange.
Would you be willing to run a debug library so we can get some detailed logs from the affected Mac server?
August 26, 2020 at 16:51 #29177npatelvParticipant@Britgirl, thanks for your response!
Sure, I’d be happy to help with whatever diagnostic steps you need to run.
By debug version, are you referring to setting log levels or do you have different library packages you’d like me to run? In the case of the former, I’ve attached both my debug-level logs and my config (which is pretty much stock from install).
Here are a couple more pieces of information that may be valuable:
– Machine: Mac Pro (Late 2013) running MacOS Catalina (10.15.6)
– Machine has 2 x ethernet ports and 1 x wi-fi adapter; wi-fi adapter is set to inactive and both ethernet ports are bound in a link aggregation with a LAN IP of 192.168.0.50
– Running the command /etc/NX/nxserver –startup results in the failures mentioned above and detailed in the attached logsHere are some other things I’ve already tried:
– I installed the same downloaded binary package on another Mac (a Macbook with wi-fi, also running 10.15.6) on the same LAN and server starts up and accepts connections fine
– I installed the downloaded binary package on a windows laptop (a Thinkpad X1 with wi-fi, running windows 10) on the same LAN and server starts up and accepts connections fine
– I have updated /etc/hosts file on affected mac to include different variations of localhost (e.g., localhost.localdomain, localhost4, etc); please see attached config archive
– Ping and DNS resolution via dscacheutil of “localhost” all work fine and resolve to 127.0.0.1 and ::1Hope that helps, but happy to provide any other info you might need!
Thanks in advance!
Attachments:
August 27, 2020 at 08:07 #29192BritgirlKeymasterHi, thanks for this additional information, this is really useful and the developers are looking further into this. In the meantime, I’m going to send you a private email to the link to the library along with instructions. Once you’ve installed it, you’ll to reproduce the problem and then submit the logs again.
August 27, 2020 at 12:27 #29202npatelvParticipant@Britgirl, thanks for the debug library; I’ve attached the command output as well as the logs.
Please let me know if you need any additional information or steps/commands run.
Attachments:
September 8, 2020 at 17:23 #29394September 8, 2020 at 17:39 #29396BritgirlKeymasterHi, the logs didn’t indicate a problem with NoMachine, but I know the developers are still analysing the issue. We’ll update you soon.
September 11, 2020 at 17:12 #29450fishermanModeratorPlease can you send output of the following commands
dscacheutil -q host -a name localhost ls -l /etc/hosts cat /etc/hosts
September 14, 2020 at 07:47 #29451npatelvParticipant@Britgirl, thank you for following up.
@Fisherman, please see attached for the output of the commands.Attachments:
October 2, 2020 at 15:20 #29775fishermanModeratorIt looks everything is OK from NoMachine side.
Please can you send output of the.
ls -la /Users/npatelv/.home/hosts
October 5, 2020 at 17:19 #29817npatelvParticipant@Fisherman, thank you for the follow up.
I played a hunch and realized the problem was being caused by the fact that I had my hosts file symlinked to my home directory (in an effort to keep it synced with my other machines).
This used to work fine before, but it looks like the introduction of the sandbox with Mojave and extended with Catalina doesn’t like the symlink anymore.
I changed the symlink to a hard link and it works fine now.
Thanks for all of the help @Fisherman and @Britgirl.
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