“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 3 mins 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 3 mins 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 3 mins 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 3 mins ago
Ryan LueRyan Lue
22919
asked 3 mins ago
Ryan LueRyan Lue
22919
asked 3 mins ago
Ryan LueRyan Lue
22919
asked 3 mins ago
Ryan LueRyan Lue
22919
asked 3 mins ago
Ryan LueRyan Lue
22919
22919
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
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: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
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
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f497124%2fport-xxx-connection-refused-when-trying-to-ssh-over-tunnel%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
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
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f497124%2fport-xxx-connection-refused-when-trying-to-ssh-over-tunnel%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
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
Required, but never shown
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
Required, but never shown
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
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
