Ubuntu SSH X11 Forwarded Client Very Slow
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Running SSH X forwarded session from my Ubuntu 12LTS client to a SLES server results in very slow(seconds per mouse click) GUI app(on the server) performance.
Using a windows client from the same LAN with Putty and XMing to SSH to the same server hosted application is blazing fast(instantaneous).
Likewise, SSH -X from other SLES machines to the same server hosted application is very fast.
I have tried numerous combinations of ssh parameters(listed below) with no effect on performance. The Ubuntu client is painfully slow while PuTTY/XMing are very fast.
-X
-C
-o GSSAPIAuthentication no
-c blowfish-cbc
UseDNS no -- on the servers sshd_config
12.04 ssh putty x11-forwarding
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up vote
4
down vote
favorite
Running SSH X forwarded session from my Ubuntu 12LTS client to a SLES server results in very slow(seconds per mouse click) GUI app(on the server) performance.
Using a windows client from the same LAN with Putty and XMing to SSH to the same server hosted application is blazing fast(instantaneous).
Likewise, SSH -X from other SLES machines to the same server hosted application is very fast.
I have tried numerous combinations of ssh parameters(listed below) with no effect on performance. The Ubuntu client is painfully slow while PuTTY/XMing are very fast.
-X
-C
-o GSSAPIAuthentication no
-c blowfish-cbc
UseDNS no -- on the servers sshd_config
12.04 ssh putty x11-forwarding
Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05
add a comment |
up vote
4
down vote
favorite
up vote
4
down vote
favorite
Running SSH X forwarded session from my Ubuntu 12LTS client to a SLES server results in very slow(seconds per mouse click) GUI app(on the server) performance.
Using a windows client from the same LAN with Putty and XMing to SSH to the same server hosted application is blazing fast(instantaneous).
Likewise, SSH -X from other SLES machines to the same server hosted application is very fast.
I have tried numerous combinations of ssh parameters(listed below) with no effect on performance. The Ubuntu client is painfully slow while PuTTY/XMing are very fast.
-X
-C
-o GSSAPIAuthentication no
-c blowfish-cbc
UseDNS no -- on the servers sshd_config
12.04 ssh putty x11-forwarding
Running SSH X forwarded session from my Ubuntu 12LTS client to a SLES server results in very slow(seconds per mouse click) GUI app(on the server) performance.
Using a windows client from the same LAN with Putty and XMing to SSH to the same server hosted application is blazing fast(instantaneous).
Likewise, SSH -X from other SLES machines to the same server hosted application is very fast.
I have tried numerous combinations of ssh parameters(listed below) with no effect on performance. The Ubuntu client is painfully slow while PuTTY/XMing are very fast.
-X
-C
-o GSSAPIAuthentication no
-c blowfish-cbc
UseDNS no -- on the servers sshd_config
12.04 ssh putty x11-forwarding
12.04 ssh putty x11-forwarding
edited Jan 29 '14 at 23:22
asked Jan 29 '14 at 22:28
user241527
2113
2113
Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05
add a comment |
Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05
Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05
add a comment |
1 Answer
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XMing doesn't support the X11 security protocol, causing it to default to trusted forwarding. It's possible SLES has ForwardX11Trusted enabled, while Ubuntu doesn't. That option allows the remote X client to make trusted calls on the local X server, which is a security risk if you don't trust the server, but can provide a substantial performance boost if you do.
You can use ssh -Y
to connect with trusted X11 forwarding or set the ForwardX11Trusted option in your ssh client config.
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
XMing doesn't support the X11 security protocol, causing it to default to trusted forwarding. It's possible SLES has ForwardX11Trusted enabled, while Ubuntu doesn't. That option allows the remote X client to make trusted calls on the local X server, which is a security risk if you don't trust the server, but can provide a substantial performance boost if you do.
You can use ssh -Y
to connect with trusted X11 forwarding or set the ForwardX11Trusted option in your ssh client config.
add a comment |
up vote
0
down vote
XMing doesn't support the X11 security protocol, causing it to default to trusted forwarding. It's possible SLES has ForwardX11Trusted enabled, while Ubuntu doesn't. That option allows the remote X client to make trusted calls on the local X server, which is a security risk if you don't trust the server, but can provide a substantial performance boost if you do.
You can use ssh -Y
to connect with trusted X11 forwarding or set the ForwardX11Trusted option in your ssh client config.
add a comment |
up vote
0
down vote
up vote
0
down vote
XMing doesn't support the X11 security protocol, causing it to default to trusted forwarding. It's possible SLES has ForwardX11Trusted enabled, while Ubuntu doesn't. That option allows the remote X client to make trusted calls on the local X server, which is a security risk if you don't trust the server, but can provide a substantial performance boost if you do.
You can use ssh -Y
to connect with trusted X11 forwarding or set the ForwardX11Trusted option in your ssh client config.
XMing doesn't support the X11 security protocol, causing it to default to trusted forwarding. It's possible SLES has ForwardX11Trusted enabled, while Ubuntu doesn't. That option allows the remote X client to make trusted calls on the local X server, which is a security risk if you don't trust the server, but can provide a substantial performance boost if you do.
You can use ssh -Y
to connect with trusted X11 forwarding or set the ForwardX11Trusted option in your ssh client config.
answered Apr 27 '14 at 2:35
chizu
1
1
add a comment |
add a comment |
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Post a picture of your speedtest results here. I think it may be an internet issue with Ubuntu. Do one in Windows as well so we may compare the two.
– Zzzach...
Mar 26 '14 at 3:10
@user241527: Did you solve this problem in the mean time? I have a similar problem: I used to work remotely from my laptop to my desktop, running Ubuntu 12.04 and 10.04 respectively, and connected through my home network. After I have bought a new desktop and upgraded to 12.04, I can barely work remotely: sometimes a window will just freeze for half a minute or so.
– Giorgio
Apr 20 '14 at 16:05