Yhyjyk

Is it unprofessional to ask if a job posting on GlassDoor is real?

In Romance of the Three Kingdoms why do people still use bamboo sticks when papers are already invented?

Anagram holiday

intersection of two sorted vectors in C++

Took a trip to a parallel universe, need help deciphering

Is it legal for company to use my work email to pretend I still work there?

What killed these X2 caps?

Is it possible to create light that imparts a greater proportion of its energy as momentum rather than heat?

Why "Having chlorophyll without photosynthesis is actually very dangerous" and "like living with a bomb"?

What mechanic is there to disable a threat instead of killing it?

AES: Why is it a good practice to use only the first 16bytes of a hash for encryption?

How to say in German "enjoying home comforts"

Is it inappropriate for a student to attend their mentor's dissertation defense?

Can a virus destroy the BIOS of a modern computer?

What does it mean to describe someone as a butt steak?

Stopping power of mountain vs road bike

Can one be a co-translator of a book, if he does not know the language that the book is translated into?

How do conventional missiles fly?

Forgetting the musical notes while performing in concert

Why can't we play rap on piano?

Python: return float 1.0 as int 1 but float 1.5 as float 1.5

Why are electrically insulating heatsinks so rare? Is it just cost?

Why is it a bad idea to hire a hitman to eliminate most corrupt politicians?

Do I have a twin with permutated remainders?

SSH “lag” in LAN on some machines, mixed distros

ssh works fine when using public interface, but slow when using private interfacehow to disable SSH login with password for some users?ssh + along delay after typing the password between win to linuxSSH/SFTP connections fails silently on OSX 10.8.2 - ssh-agent issueFilezilla/Puttygen doesn't recognize private key fileSporadic “ssh_exchange_identification: read: Connection reset by peer” ErrorLocal port forwarding and Putty connectionOpenSSH server on Windows refusing to work without STDIN even in noninteractive modessh -N steals keystrokesproblems with ssh connection: sometimes succesfull/sometimes timeout/sometimes hangs

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;

1

I've had a strange problem with SSH connections inside my LAN for a few months. It only happens when I'm using my Windows 10 device to connect to a (barebone) linux machine.

When I connect to a SSH server it's like my input is only sent once every second. If I hold a key, it doesn't print anything for a second and after that second I see every keystroke I did during that time.

This is how it looks on the working servers:

This is how it looks on the ones with the issue:

Things I have tested/found out

• Changing the "UseDNS" setting in /etc/sshd doesn't fix it


• It happens with bash (and zsh) on Debian (OpenSSH_7.4p1 Debian-10+deb9u6, OpenSSL 1.0.2r 26 Feb 2019) and Ash on Alpine Linux (OpenSSH_7.9p1, OpenSSL 1.1.1b 26 Feb 2019)


• It doesn't happen on Alpine Linux OpenSSH_7.7p1, LibreSSL 2.7.4


• It doesn't happen with every machine, just some (not depending on the distro)


• resolv.conf is correct


• Error happens with and without ClientAliveInterval (tested on client and server)


• Pinging the devices is always fast (less than 1 ms) so it's only SSH


• It also lags when I ssh from the linux subsystem on Windows 10 and with Putty and with MobaXterm


• No problems when I connect from Linux instead of Windows

Does anyone have any clues or things I could try?
Thanks

linux ssh windows-10 putty lag

share|improve this question

asked 3 hours ago

ChristianChristian

83416

add a comment | 

1

I've had a strange problem with SSH connections inside my LAN for a few months. It only happens when I'm using my Windows 10 device to connect to a (barebone) linux machine.

When I connect to a SSH server it's like my input is only sent once every second. If I hold a key, it doesn't print anything for a second and after that second I see every keystroke I did during that time.

This is how it looks on the working servers:

This is how it looks on the ones with the issue:

Things I have tested/found out

• Changing the "UseDNS" setting in /etc/sshd doesn't fix it


• It happens with bash (and zsh) on Debian (OpenSSH_7.4p1 Debian-10+deb9u6, OpenSSL 1.0.2r 26 Feb 2019) and Ash on Alpine Linux (OpenSSH_7.9p1, OpenSSL 1.1.1b 26 Feb 2019)


• It doesn't happen on Alpine Linux OpenSSH_7.7p1, LibreSSL 2.7.4


• It doesn't happen with every machine, just some (not depending on the distro)


• resolv.conf is correct


• Error happens with and without ClientAliveInterval (tested on client and server)


• Pinging the devices is always fast (less than 1 ms) so it's only SSH


• It also lags when I ssh from the linux subsystem on Windows 10 and with Putty and with MobaXterm


• No problems when I connect from Linux instead of Windows

Does anyone have any clues or things I could try?
Thanks

linux ssh windows-10 putty lag

share|improve this question

asked 3 hours ago

ChristianChristian

83416

add a comment | 

I've had a strange problem with SSH connections inside my LAN for a few months. It only happens when I'm using my Windows 10 device to connect to a (barebone) linux machine.

When I connect to a SSH server it's like my input is only sent once every second. If I hold a key, it doesn't print anything for a second and after that second I see every keystroke I did during that time.

This is how it looks on the working servers:

This is how it looks on the ones with the issue:

Things I have tested/found out

• Changing the "UseDNS" setting in /etc/sshd doesn't fix it


• It happens with bash (and zsh) on Debian (OpenSSH_7.4p1 Debian-10+deb9u6, OpenSSL 1.0.2r 26 Feb 2019) and Ash on Alpine Linux (OpenSSH_7.9p1, OpenSSL 1.1.1b 26 Feb 2019)


• It doesn't happen on Alpine Linux OpenSSH_7.7p1, LibreSSL 2.7.4


• It doesn't happen with every machine, just some (not depending on the distro)


• resolv.conf is correct


• Error happens with and without ClientAliveInterval (tested on client and server)


• Pinging the devices is always fast (less than 1 ms) so it's only SSH


• It also lags when I ssh from the linux subsystem on Windows 10 and with Putty and with MobaXterm


• No problems when I connect from Linux instead of Windows

Does anyone have any clues or things I could try?
Thanks

linux ssh windows-10 putty lag

share|improve this question

asked 3 hours ago

ChristianChristian

83416

share|improve this question

asked 3 hours ago

ChristianChristian

83416

share|improve this question

asked 3 hours ago

ChristianChristian

83416

asked 3 hours ago

ChristianChristian

83416

asked 3 hours ago

ChristianChristian

83416

1 Answer
1

active

oldest

votes

4

Typically this is a sign of Nagel’s algorithm, you can turn that socket option off.

(I have seen similar TCP delays between Linux and Windows before in other cases as well. In one case it was caused by interactions between TCP Windows sizes and PSH (Push) flags which caused Windows to acknowledge late and/or retry.)

share|improve this answer

edited 3 hours ago

answered 3 hours ago

eckeseckes

636516

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, thanks for that quick fix! In the Putty settings I unchecked the "Disable Nagle's algorithm" checkbox (which seems to be ticked by default) and now it works!
  
  – Christian
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christian thanks for confirmation, I simplified my answer a bit
  
  – eckes
  3 hours ago
  

  
  
  
  

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "2"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fserverfault.com%2fquestions%2f961576%2fssh-lag-in-lan-on-some-machines-mixed-distros%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

4

Typically this is a sign of Nagel’s algorithm, you can turn that socket option off.

(I have seen similar TCP delays between Linux and Windows before in other cases as well. In one case it was caused by interactions between TCP Windows sizes and PSH (Push) flags which caused Windows to acknowledge late and/or retry.)

share|improve this answer

edited 3 hours ago

answered 3 hours ago

eckeseckes

636516

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, thanks for that quick fix! In the Putty settings I unchecked the "Disable Nagle's algorithm" checkbox (which seems to be ticked by default) and now it works!
  
  – Christian
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christian thanks for confirmation, I simplified my answer a bit
  
  – eckes
  3 hours ago
  

  
  
  
  

add a comment | 

4

Typically this is a sign of Nagel’s algorithm, you can turn that socket option off.

(I have seen similar TCP delays between Linux and Windows before in other cases as well. In one case it was caused by interactions between TCP Windows sizes and PSH (Push) flags which caused Windows to acknowledge late and/or retry.)

share|improve this answer

edited 3 hours ago

answered 3 hours ago

eckeseckes

636516

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, thanks for that quick fix! In the Putty settings I unchecked the "Disable Nagle's algorithm" checkbox (which seems to be ticked by default) and now it works!
  
  – Christian
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christian thanks for confirmation, I simplified my answer a bit
  
  – eckes
  3 hours ago
  

  
  
  
  

add a comment | 

Typically this is a sign of Nagel’s algorithm, you can turn that socket option off.

(I have seen similar TCP delays between Linux and Windows before in other cases as well. In one case it was caused by interactions between TCP Windows sizes and PSH (Push) flags which caused Windows to acknowledge late and/or retry.)

share|improve this answer

edited 3 hours ago

answered 3 hours ago

eckeseckes

636516

share|improve this answer

edited 3 hours ago

answered 3 hours ago

eckeseckes

636516

answered 3 hours ago

eckeseckes

636516

answered 3 hours ago

eckeseckes

636516