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llesh avatar Ubuntu

Cannot use ssh keys anymore to connect with different services or repositories

au flag
llesh

I set a bunch of keys that I use for various reasons like connecting to my personal website or various source control management platforms like GitHub or sourcehut. I was working as usually as recently as yesterday, but today suddenly none of my keys worked when I tried to connect with ssh. When I try to connect it just for example to my website it shows this screen:

# ssh -vvv -i ~/.ssh/digitalocean_ed25519 [email protected]
OpenSSH_8.2p1 Ubuntu-4ubuntu0.2, OpenSSL 1.1.1f  31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug2: resolving "mywebsite.com" port 22
debug2: ssh_connect_direct
debug1: Connecting to mywebsite.com [mywebsiteip] port 22.
debug1: connect to address mywebsiteip port 22: Connection timed out
ssh: connect to host mywebsite.com port 22: Connection timed out

Same thing happens when I try to clone a read/write repository for source management websites like github or sourcehut.

From another question it suggests to look the permissions, but they appear to be ok. And I didn't had a config file.

ls -l
total 36
-rw------- 1 user user  464 Jul 17 09:41 digitalocean_ed25519
-rw-r--r-- 1 user user  104 Apr 12 20:55 digitalocean_ed25519.pub
-rw------- 1 user user  464 Apr 12 17:02 github_ed25519
-rw-r--r-- 1 user user  104 Apr 12 17:02 github_ed25519.pub
-rw------- 1 user user  419 Apr 17 23:11 gitlab_ed25519
-rw-r--r-- 1 user user  104 Apr 17 23:11 gitlab_ed25519.pub
-rw------- 1 user user 1998 Jun  1 21:59 known_hosts
-rw------- 1 user user 2655 Apr 12 19:44 srht_rsa
-rw-r--r-- 1 user user  566 Apr 12 19:44 srht_rsa.pub

and .ssh folder has 700 permission. I reinstalled ssh sudo apt install openssh-server but to no avail. Problem persists even after reinstalling. Only thing I did I deleted in the .ssh folder is the file known_hosts.old, but I think it has nothing to do to my problem. I suspect the key management system of Ubuntu 20.04 is to blame, but I am not sure.

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in flag
matigo
Which version of Ubuntu are you running? Have the file permissions in your `.ssh` directory recently changed?
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waltinator avatar
it flag
waltinator
Since the other end is timing out, check the server logs.
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user535733 avatar
cn flag
user535733
Check your output: `connection timed out` is not an ssh authentication error. It suggests a network problem at the server end.
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llesh avatar
au flag
llesh
@waltinator I think the problem is on my part . My public keys are in the remote server as they should be https://github.com/username.keys, https://gitlab.com/username.keys, or https://meta.sr.ht/keys .
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waltinator avatar
it flag
waltinator
Read `man ssh-add` and start with `ssh-add -l`.
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Score:0
llesh avatar Ubuntu
au flag
llesh

Update

I am sorry for wasting everyone's time. My ISP was to blame because it updated my modem, changed my password and blocked port 22 for 'security' reasons. I wasted two days about this problem, changing my configurations, trying different ports, resetting my router just because ISP didn't even bother to sent me a notice. Thank you for your answers.

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