Ticket #14189 (new defect)

Opened 7 years ago

Last modified 7 years ago

Port forwarding silently fails when source ports are privileged

Reported by: meta Owned by:
Component: network/NAT Version: VirtualBox 4.3.28
Keywords: port forwarding, connection refused Cc:
Guest type: Linux Host type: Linux


I just spent a really unproductive hour or so trying to work out why I was getting "Connection refused" from a test LDAP server in a VM.

Then I resorted to trying to forward the port using SSH. The SSH client reminded me that privileged ports cannot be forwarded unless you're root. (Oh yeah, Unix. Privileged ports. I remember now.)

So my suggestion is:

  • The VirtualBox GUI should warn the user about this.
  • There should be an error displayed if port forwarding fails because the port is privileged.

The documentation at mentions the limitation, but it states that the VM will refuse to start in such a situation. That doesn't appear to be true -- I tried restarting the VM and didn't get a useful error message.

Change History

comment:1 Changed 7 years ago by vushakov

  • Component changed from other to network/NAT
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