“port : connection refused” when trying to SSH over tunnel
0
I have three machines (let's call them A, B, and C). I want to SSH from A via B into C.
I set up an SSH tunnel from B to C:
B:~ $ ssh user@C -NL 2222:localhost:22
I know the tunnel is working, because on machine B, localhost:2222 leads to C:
B:~ $ ssh -p 2222 localhost
user@localhost's password:
Linux C 4.19.0-1-amd64 #1 SMP Debian 4.19.12-1 (2018-12-22) x86_64
...
C:~ $
But when I try to do the same from machine A, I get a connection refused error:
A:~ $ ssh -vvvvp 2222 B
OpenSSH_7.9p1 Debian-5, OpenSSL 1.1.1a 20 Nov 2018
debug1: Reading configuration data /home/user/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolve_canonicalize: hostname B is address
debug2: ssh_connect_direct
debug1: Connectiong to B [B] port 2222.
debug1: connect to address B port 2222: connection refused
ssh: connect to host B port 2222: connection refused
What am I missing?
What I've checked/tried
Firewall: There is, indeed, a firewall on B. However, I can SSH into it sans tunnel just fine, and the rules for port 22 and port 2222 are identical:
B:~ $ sudo ufw status
[sudo] password for user:
Status: active
To Action From
-- ------ ----
22/tcp ALLOW Anywhere
2222/tcp ALLOW Anywhere
22/tcp (v6) ALLOW Anywhere (v6)
2222/tcp (v6) ALLOW Anywhere (v6)
Port forwarding: This is all happening over the local network, though the goal is to do it remotely. B is exposed to the public Internet via my home router / port forwarding, and rules for 22 and 2222 are, again, identical.
ssh-tunneling
asked 1 min ago
Ryan LueRyan Lue
22919
add a comment |
0
I have three machines (let's call them A, B, and C). I want to SSH from A via B into C.
I set up an SSH tunnel from B to C:
B:~ $ ssh user@C -NL 2222:localhost:22
I know the tunnel is working, because on machine B, localhost:2222 leads to C:
B:~ $ ssh -p 2222 localhost
user@localhost's password:
Linux C 4.19.0-1-amd64 #1 SMP Debian 4.19.12-1 (2018-12-22) x86_64
...
C:~ $
But when I try to do the same from machine A, I get a connection refused error:
A:~ $ ssh -vvvvp 2222 B
OpenSSH_7.9p1 Debian-5, OpenSSL 1.1.1a 20 Nov 2018
debug1: Reading configuration data /home/user/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolve_canonicalize: hostname B is address
debug2: ssh_connect_direct
debug1: Connectiong to B [B] port 2222.
debug1: connect to address B port 2222: connection refused
ssh: connect to host B port 2222: connection refused
What am I missing?
What I've checked/tried
Firewall: There is, indeed, a firewall on B. However, I can SSH into it sans tunnel just fine, and the rules for port 22 and port 2222 are identical:
B:~ $ sudo ufw status
[sudo] password for user:
Status: active
To Action From
-- ------ ----
22/tcp ALLOW Anywhere
2222/tcp ALLOW Anywhere
22/tcp (v6) ALLOW Anywhere (v6)
2222/tcp (v6) ALLOW Anywhere (v6)
Port forwarding: This is all happening over the local network, though the goal is to do it remotely. B is exposed to the public Internet via my home router / port forwarding, and rules for 22 and 2222 are, again, identical.
ssh-tunneling
asked 1 min ago
Ryan LueRyan Lue
22919
add a comment |
0
0
0
I have three machines (let's call them A, B, and C). I want to SSH from A via B into C.
I set up an SSH tunnel from B to C:
B:~ $ ssh user@C -NL 2222:localhost:22
I know the tunnel is working, because on machine B, localhost:2222 leads to C:
B:~ $ ssh -p 2222 localhost
user@localhost's password:
Linux C 4.19.0-1-amd64 #1 SMP Debian 4.19.12-1 (2018-12-22) x86_64
...
C:~ $
But when I try to do the same from machine A, I get a connection refused error:
A:~ $ ssh -vvvvp 2222 B
OpenSSH_7.9p1 Debian-5, OpenSSL 1.1.1a 20 Nov 2018
debug1: Reading configuration data /home/user/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolve_canonicalize: hostname B is address
debug2: ssh_connect_direct
debug1: Connectiong to B [B] port 2222.
debug1: connect to address B port 2222: connection refused
ssh: connect to host B port 2222: connection refused
What am I missing?
What I've checked/tried
Firewall: There is, indeed, a firewall on B. However, I can SSH into it sans tunnel just fine, and the rules for port 22 and port 2222 are identical:
B:~ $ sudo ufw status
[sudo] password for user:
Status: active
To Action From
-- ------ ----
22/tcp ALLOW Anywhere
2222/tcp ALLOW Anywhere
22/tcp (v6) ALLOW Anywhere (v6)
2222/tcp (v6) ALLOW Anywhere (v6)
Port forwarding: This is all happening over the local network, though the goal is to do it remotely. B is exposed to the public Internet via my home router / port forwarding, and rules for 22 and 2222 are, again, identical.
ssh-tunneling
asked 1 min ago
Ryan LueRyan Lue
22919
I have three machines (let's call them A, B, and C). I want to SSH from A via B into C.
I set up an SSH tunnel from B to C:
B:~ $ ssh user@C -NL 2222:localhost:22
I know the tunnel is working, because on machine B, localhost:2222 leads to C:
B:~ $ ssh -p 2222 localhost
user@localhost's password:
Linux C 4.19.0-1-amd64 #1 SMP Debian 4.19.12-1 (2018-12-22) x86_64
...
C:~ $
But when I try to do the same from machine A, I get a connection refused error:
A:~ $ ssh -vvvvp 2222 B
OpenSSH_7.9p1 Debian-5, OpenSSL 1.1.1a 20 Nov 2018
debug1: Reading configuration data /home/user/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolve_canonicalize: hostname B is address
debug2: ssh_connect_direct
debug1: Connectiong to B [B] port 2222.
debug1: connect to address B port 2222: connection refused
ssh: connect to host B port 2222: connection refused
What am I missing?
What I've checked/tried
Firewall: There is, indeed, a firewall on B. However, I can SSH into it sans tunnel just fine, and the rules for port 22 and port 2222 are identical:
B:~ $ sudo ufw status
[sudo] password for user:
Status: active
To Action From
-- ------ ----
22/tcp ALLOW Anywhere
2222/tcp ALLOW Anywhere
22/tcp (v6) ALLOW Anywhere (v6)
2222/tcp (v6) ALLOW Anywhere (v6)
Port forwarding: This is all happening over the local network, though the goal is to do it remotely. B is exposed to the public Internet via my home router / port forwarding, and rules for 22 and 2222 are, again, identical.
ssh-tunneling
ssh-tunneling
asked 1 min ago
Ryan LueRyan Lue
22919
asked 1 min ago
Ryan LueRyan Lue
22919
asked 1 min ago
Ryan LueRyan Lue
22919
asked 1 min ago
Ryan LueRyan Lue
22919
asked 1 min ago
Ryan LueRyan Lue
22919
22919
add a comment |
add a comment |
0
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