My SFTP connection speeds over a local network are terrible now. I used to get around 55MB/s and now I get around 100KB/s and constantly getting host is not communicating for more than 15 seconds errors from WinSCP.

 

Is there some setting I need to go find and change? Forgive me, I'm not a Linux expert by any stretch of the imagination. 

 

This is all I see in the logs:
Sep 25 09:26:28 Tower sshd[20211]: SSH: Server;LType: Throughput;Remote: 192.168.3.3-60509;IN: 0;OUT: 6304;Duration: 75.8;tPut_in: 0.0;tPut_out: 83.2
Sep 25 09:26:34 Tower sshd[20888]: SSH: Server;Ltype: Version;Remote: 192.168.3.3-60534;Protocol: 2.0;Client: WinSCP_release_5.13.2
Sep 25 09:26:34 Tower sshd[20888]: SSH: Server;Ltype: Kex;Remote: 192.168.3.3-60534;Enc: aes256-ctr;MAC: hmac-sha2-256;Comp: none [preauth]
Sep 25 09:26:34 Tower sshd[20888]: SSH: Server;Ltype: Authname;Remote: 192.168.3.3-60534;Name: root [preauth]
Sep 25 09:26:34 Tower sshd[20888]: Accepted password for root from 192.168.3.3 port 60534 ssh2
Sep 25 09:26:34 Tower sshd[20888]: SSH: Server;Ltype: Kex;Remote: 192.168.3.3-60534;Enc: aes256-ctr;MAC: hmac-sha2-256;Comp: none

Edited September 25, 20187 yr by BioHazardous

on the connect prompt click advanced, connections, and deselect optimize connection buffer size. It made mine work but don't know why it's messed.

Thanks!  That helped. I'll have to do a real test later when I transfer a movie file over that I rip later today. I was only copying small files off of the server for a backup of my thumb drive, so obviously it won't ramp up to full speed with those small of files.