Putty Server Unexpectedly Closed Network Connection After Login Updated FREE
Putty Server Unexpectedly Closed Network Connection After Login
PuTTY Fatal Error: Network Error: Software Caused Connection Abort
Last updated on | 19 replies
Windows tin trigger this error if PuTTY has given up on the machine at the other stop of the connection. In this article we will configure PuTTY to endeavour to go along idle connections alive.
TCP Keepalives
Some network routers and firewalls need to keep rail of all connections through them. Usually, these firewalls will presume a connection is expressionless if no information is transferred in either management after a sure time interval.
This can cause PuTTY sessions to be unexpectedly closed by the firewall if no traffic is seen in the session for some time, which will trigger the error: "Network Error: Software Acquired Connection Abort".
To solve this effect, you can configure PuTTY to ship nada packets and TCP keepalives every few seconds.
Configure PuTTY
In the left-hand menu pane, select Connexion
In the field beside Seconds between keepalives, enter 5.
Check Enable TCP Keepalives (SO_KEEPALIVE choice)
At present click Open and leave the SSH connection idle for a while to run across if it stays upwardly.
If you are using a PuTTY session contour, don't forget to Save your profile with these new settings.
Still Getting Disconnected?
Cheque for an unreliable Internet connection
If you lot are still getting the mistake "Network Error: Software Caused Connection Arrest" despite enabling TCP Keepalives, the trouble may be due to an unreliable Cyberspace connection. Monitoring your pings is a good style of determining if your internet connection is dropping packets and to blame for PuTTY disconnecting.
Open Windows Command Prompt and run ping google.com -t (or the IP address of your remote server) and leave it running while your SSH connection is open. If you come across even i bulletin saying "Request timed out" , this indicates an internet connectivity issue, which may cause PuTTY to disconnect with "Network Fault: Software Acquired Connection Abort".
You lot can also attempt some software that tests the uptime of an Internet connection. See: Internet Connectivity Monitor.
Try a unlike SSH client
Endeavour using a different SSH client like (http://kitty.9bis.net) and run across if the problem happens on that likewise. If it does, you can isolate the trouble away from PuTTY.
TCP Keepalives are not always helpful..
TCP Keepalives assist if you have a firewall which drops your connection after an idle period; but if the network between you and the server suffers from breaks in connectivity, keepalives tin really make things worse.
If a session is idle, and connectivity is temporarily lost between the endpoints, but the connectivity is restored before either side tries to transport annihilation, then in that location volition be no problem – neither endpoint will find that anything was wrong.
However, if one side does send something during the interruption, information technology will repeatedly try to re-send, and eventually give up and abandon the connection. And so when connectivity is restored, the other side will find that the beginning side doesn't believe in that location is an open connection any more.
TCP Keepalives can make this sort of problem worse, because they increase the probability that PuTTY will try to send data during a break in connectivity. Other types of periodic network activeness tin can cause this behaviour; in particular, SSH-2 re-keys tin can have this effect.
Therefore, you lot might find that TCP Keepalives help connexion loss, or you might observe they make it worse, depending on what kind of network problems you have betwixt y'all and the server.
Found a Solution Yet?
Let the states all know in the comments as this appears to be quite an elusive trouble for many!
While You're Hither..
Sick of inbound your Linux password every time you log in via PuTTY? See:
- Saving your PuTTY username and countersign in a Windows Shortcut
- PuTTY and SSH Cardinal-Based Authentication
Brand sure to keep your PuTTY settings backed up or copy them to some other PC:
- How to Backup and Copy PuTTY Sessions and Settings to Another PC
Did you know you can utilize PuTTY to gear up a secure tunnel to your Linux box and then connect via VNC?
- How to Install VNC and Use PuTTY to Connect from Windows
Let me know if this helped. Follow me on Twitter, Facebook and YouTube, or 🍊 buy me a smoothie.
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Putty Server Unexpectedly Closed Network Connection After Login
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Source: https://devanswers.co/ubuntu-ssh-keeps-disconnecting-idle/
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