Putty's freezes at home but works fine at office
0
I've an interesting problem.
Connecting to Ubuntu Server 16.04 from my Windows 7 through Putty freezes on my home network. "ls -l" displays a few lines and freezes. Opening vi makes the screen blank. It never comes back after that.
strace with any Linux shell command freezes as well. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
Same works without any problems from my office network. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
ubuntu@5x:~$ strace ifconfig
execve("/sbin/ifconfig", ["ifconfig"], [/* 20 vars */]) = 0
brk(NULL) = 0xd0b000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=27822, ...}) = 0
mmap(NULL, 27822, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7feb7de1a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK
Putty freeze screenshot
windows ubuntu freeze putty
asked Feb 4 '18 at 4:07
HemHem
31
|
show 5 more comments
0
I've an interesting problem.
Connecting to Ubuntu Server 16.04 from my Windows 7 through Putty freezes on my home network. "ls -l" displays a few lines and freezes. Opening vi makes the screen blank. It never comes back after that.
strace with any Linux shell command freezes as well. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
Same works without any problems from my office network. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
ubuntu@5x:~$ strace ifconfig
execve("/sbin/ifconfig", ["ifconfig"], [/* 20 vars */]) = 0
brk(NULL) = 0xd0b000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=27822, ...}) = 0
mmap(NULL, 27822, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7feb7de1a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK
Putty freeze screenshot
windows ubuntu freeze putty
asked Feb 4 '18 at 4:07
HemHem
31
It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16
|
show 5 more comments
0
0
0
I've an interesting problem.
Connecting to Ubuntu Server 16.04 from my Windows 7 through Putty freezes on my home network. "ls -l" displays a few lines and freezes. Opening vi makes the screen blank. It never comes back after that.
strace with any Linux shell command freezes as well. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
Same works without any problems from my office network. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
ubuntu@5x:~$ strace ifconfig
execve("/sbin/ifconfig", ["ifconfig"], [/* 20 vars */]) = 0
brk(NULL) = 0xd0b000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=27822, ...}) = 0
mmap(NULL, 27822, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7feb7de1a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK
Putty freeze screenshot
windows ubuntu freeze putty
asked Feb 4 '18 at 4:07
HemHem
31
I've an interesting problem.
Connecting to Ubuntu Server 16.04 from my Windows 7 through Putty freezes on my home network. "ls -l" displays a few lines and freezes. Opening vi makes the screen blank. It never comes back after that.
strace with any Linux shell command freezes as well. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
Same works without any problems from my office network. I tried rebooting Windows and Linux both. Tried different versions of Putty. Nothing helped me.
ubuntu@5x:~$ strace ifconfig
execve("/sbin/ifconfig", ["ifconfig"], [/* 20 vars */]) = 0
brk(NULL) = 0xd0b000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=27822, ...}) = 0
mmap(NULL, 27822, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7feb7de1a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK
Putty freeze screenshot
windows ubuntu freeze putty
windows ubuntu freeze putty
asked Feb 4 '18 at 4:07
HemHem
31
asked Feb 4 '18 at 4:07
HemHem
31
asked Feb 4 '18 at 4:07
HemHem
31
asked Feb 4 '18 at 4:07
HemHem
31
asked Feb 4 '18 at 4:07
HemHem
31
31
It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16
|
show 5 more comments
It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16
It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16
|
show 5 more comments
1 Answer
1
active
oldest
votes
0
Same exact problem here: Accessing Ubuntu server from home via OpenVPN led to freezes with ls -l in certain directories and many other commands. WinSCP also froze when listing certain directories.
Reducing MTU on the VPN connection worked for me:
netsh interface ipv4 set subinterface "Local Area Connection* 2" mtu=1430 store=persistent
netsh interface ipv4 set subinterface "Ethernet 2" mtu=1430 store=persistent
Thanks, @bizna!
edited Feb 9 at 0:11
Scott
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (mtu-test) - For me, addingmssfix 1409to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…
– Hound
Feb 26 at 21:39
add a comment |
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1 Answer
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0
Same exact problem here: Accessing Ubuntu server from home via OpenVPN led to freezes with ls -l in certain directories and many other commands. WinSCP also froze when listing certain directories.
Reducing MTU on the VPN connection worked for me:
netsh interface ipv4 set subinterface "Local Area Connection* 2" mtu=1430 store=persistent
netsh interface ipv4 set subinterface "Ethernet 2" mtu=1430 store=persistent
Thanks, @bizna!
edited Feb 9 at 0:11
Scott
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (mtu-test) - For me, addingmssfix 1409to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…
– Hound
Feb 26 at 21:39
add a comment |
0
Same exact problem here: Accessing Ubuntu server from home via OpenVPN led to freezes with ls -l in certain directories and many other commands. WinSCP also froze when listing certain directories.
Reducing MTU on the VPN connection worked for me:
netsh interface ipv4 set subinterface "Local Area Connection* 2" mtu=1430 store=persistent
netsh interface ipv4 set subinterface "Ethernet 2" mtu=1430 store=persistent
Thanks, @bizna!
edited Feb 9 at 0:11
Scott
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (mtu-test) - For me, addingmssfix 1409to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…
– Hound
Feb 26 at 21:39
add a comment |
0
0
0
Same exact problem here: Accessing Ubuntu server from home via OpenVPN led to freezes with ls -l in certain directories and many other commands. WinSCP also froze when listing certain directories.
Reducing MTU on the VPN connection worked for me:
netsh interface ipv4 set subinterface "Local Area Connection* 2" mtu=1430 store=persistent
netsh interface ipv4 set subinterface "Ethernet 2" mtu=1430 store=persistent
Thanks, @bizna!
edited Feb 9 at 0:11
Scott
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
Same exact problem here: Accessing Ubuntu server from home via OpenVPN led to freezes with ls -l in certain directories and many other commands. WinSCP also froze when listing certain directories.
Reducing MTU on the VPN connection worked for me:
netsh interface ipv4 set subinterface "Local Area Connection* 2" mtu=1430 store=persistent
netsh interface ipv4 set subinterface "Ethernet 2" mtu=1430 store=persistent
Thanks, @bizna!
edited Feb 9 at 0:11
Scott
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
edited Feb 9 at 0:11
Scott
15.9k113990
edited Feb 9 at 0:11
Scott
15.9k113990
edited Feb 9 at 0:11
Scott
15.9k113990
15.9k113990
answered Feb 8 at 21:35
HoundHound
1183
answered Feb 8 at 21:35
HoundHound
1183
answered Feb 8 at 21:35
HoundHound
1183
1183
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (mtu-test) - For me, addingmssfix 1409to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…
– Hound
Feb 26 at 21:39
add a comment |
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (mtu-test) - For me, addingmssfix 1409to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…
– Hound
Feb 26 at 21:39
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
I used the same VPN connection both in office and from home as well. These days I do not see the issue and not sure what solved the issue.
– Hem
Feb 11 at 16:59
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (
mtu-test) - For me, adding mssfix 1409 to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…– Hound
Feb 26 at 21:39
Further info that I've learned since: - This is a known problem with OpenVPN via UDP - OpenVPN can do an MTU test to figure out a good value and restrict its control package sizes (
mtu-test) - For me, adding mssfix 1409 to my client.ovpn was a more satisfying solution Relevant further links: community.openvpn.net/openvpn/wiki/… wandin.net/dotclear/index.php?post/2009/01/08/OpenVPN-MTU-Size sonassi.com/help/troubleshooting/…– Hound
Feb 26 at 21:39
add a comment |
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It sounds like there is a communication problem between the 2 machines, and since the connection is not stable / persistent then SSH just freezes. Another option is that there is another application on your Win7 machine that uses port 22 and thus blocks it for Putty's use.
– bizna
Feb 4 '18 at 6:35
It happens just with one particular machine. I do not see this issue with other Ubuntu server machines.
– Hem
Feb 4 '18 at 21:34
ok, now it is not just me...my colleague has the same problem.
– Hem
Feb 7 '18 at 16:05
Perhaps for some reason Putty does not properly keep the session alive. Try the following in your connection settings: Connection>Enable TCP Keepalives and Connection>Seconds Between Intervals Found it here: lowendtalk.com/discussion/11423/what-to-do-when-putty-freezes
– bizna
Feb 8 '18 at 18:13
And another solution: unix.stackexchange.com/a/20195/24500
– bizna
Feb 8 '18 at 18:16