how to close/reuse ssh LocalForward ports
Clash Royale CLAN TAG#URR8PPP
I need to ssh to multiple hosts having this configuration:
Protocol 2
ExitOnForwardFailure yes
ServerAliveCountMax 1
ServerAliveInterval 3
TCPKeepAlive no
ControlMaster auto
ControlPath ~/.ssh/sockets/%C
ControlPersist 10m
Host targetA
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
Host targetB
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
After connecting to host targetA and then trying to connect to targetB I get this error:
bind [127.0.0.1]:8888: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8888
Therefore I need to kill existing connections to be available to connect to targetB and use the same ports 8888 & 3306, something like this:
lsof -ti:8888,3306 | xargs -L1 kill -9
or
ssh -O exit targetA
This works but would like to know if there is a way to simplify this process, probably with something in ~.ssh/config, and continue to have the ControlMaster and ControlPath options besides still using same ports.
Tried already something like ProxyCommand sh -c "script.sh; ssh %h %p" without success.
ssh ssh-tunneling autossh
asked Feb 4 at 20:42
nbarinbari
43437
add a comment |
I need to ssh to multiple hosts having this configuration:
Protocol 2
ExitOnForwardFailure yes
ServerAliveCountMax 1
ServerAliveInterval 3
TCPKeepAlive no
ControlMaster auto
ControlPath ~/.ssh/sockets/%C
ControlPersist 10m
Host targetA
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
Host targetB
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
After connecting to host targetA and then trying to connect to targetB I get this error:
bind [127.0.0.1]:8888: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8888
Therefore I need to kill existing connections to be available to connect to targetB and use the same ports 8888 & 3306, something like this:
lsof -ti:8888,3306 | xargs -L1 kill -9
or
ssh -O exit targetA
This works but would like to know if there is a way to simplify this process, probably with something in ~.ssh/config, and continue to have the ControlMaster and ControlPath options besides still using same ports.
Tried already something like ProxyCommand sh -c "script.sh; ssh %h %p" without success.
ssh ssh-tunneling autossh
asked Feb 4 at 20:42
nbarinbari
43437
Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00
add a comment |
I need to ssh to multiple hosts having this configuration:
Protocol 2
ExitOnForwardFailure yes
ServerAliveCountMax 1
ServerAliveInterval 3
TCPKeepAlive no
ControlMaster auto
ControlPath ~/.ssh/sockets/%C
ControlPersist 10m
Host targetA
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
Host targetB
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
After connecting to host targetA and then trying to connect to targetB I get this error:
bind [127.0.0.1]:8888: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8888
Therefore I need to kill existing connections to be available to connect to targetB and use the same ports 8888 & 3306, something like this:
lsof -ti:8888,3306 | xargs -L1 kill -9
or
ssh -O exit targetA
This works but would like to know if there is a way to simplify this process, probably with something in ~.ssh/config, and continue to have the ControlMaster and ControlPath options besides still using same ports.
Tried already something like ProxyCommand sh -c "script.sh; ssh %h %p" without success.
ssh ssh-tunneling autossh
asked Feb 4 at 20:42
nbarinbari
43437
I need to ssh to multiple hosts having this configuration:
Protocol 2
ExitOnForwardFailure yes
ServerAliveCountMax 1
ServerAliveInterval 3
TCPKeepAlive no
ControlMaster auto
ControlPath ~/.ssh/sockets/%C
ControlPersist 10m
Host targetA
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
Host targetB
HostName <server-ip>
User user-name
LocalForward 8888 localhost:8888
LocalForward 3306 localhost:3306
After connecting to host targetA and then trying to connect to targetB I get this error:
bind [127.0.0.1]:8888: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8888
Therefore I need to kill existing connections to be available to connect to targetB and use the same ports 8888 & 3306, something like this:
lsof -ti:8888,3306 | xargs -L1 kill -9
or
ssh -O exit targetA
This works but would like to know if there is a way to simplify this process, probably with something in ~.ssh/config, and continue to have the ControlMaster and ControlPath options besides still using same ports.
Tried already something like ProxyCommand sh -c "script.sh; ssh %h %p" without success.
ssh ssh-tunneling autossh
ssh ssh-tunneling autossh
asked Feb 4 at 20:42
nbarinbari
43437
asked Feb 4 at 20:42
nbarinbari
43437
edited Feb 5 at 9:32
nbari
asked Feb 4 at 20:42
nbarinbari
43437
asked Feb 4 at 20:42
nbarinbari
43437
asked Feb 4 at 20:42
nbarinbari
43437
43437
Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00
add a comment |
Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00
Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00
Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00
add a comment |
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Possibly useful: unix.stackexchange.com/a/400438/315749
– fra-san
Feb 5 at 10:00