I have two machines on the same ethernet network segment:
- VM running Windows Server 2012R2 [sftp client]
- Physical server running Ubuntu 16.04.7 LTS [sftp server running openssh-server 1:7.2p2-4ubuntu2.10]
When I establish an SFTP connection from the windows VM to the ubuntu server, when I try to list the files in a directory that has a large number of them, the connection hangs. Folders with small numbers of files work fine.
If I try the same thing using a different Ubuntu 16.04.7 machine as the client, it works fine.
Also tried a max size ping using ping -l 1472 -f
and that worked correctly.
Things I have tried that didn't change the outcome:
- multiple SFTP clients on windows: PuTTY 0.74, WinSCP 5.17.9, and FileZilla 3.52.0.5
- lowering the MTU on the windows VM [default 1500]
- lowering the MTU on the ubuntu server [default 1500]
- updating the vmxnet3 ethernet driver from 1.8.16.0 to 1.8.17.0
- using a different Windows Server 2012R2 VM as the client
- using a Windows Server 2016 VM as the client
- using a Windows Server 2016 physical machine as the client
I'm now stumped. Any ideas or suggestions for further troubleshooting?