openssh server remote access

[sd tech]

Invoking ssh -v user at host will usually tell you more about why something 
is or isn't working. There are risks with making it internet accessible 
to the world.  I use fail2ban as a way to reduce impact of ssh brute 
force attacks. Recommend using ssh keys only if at all possible.

Here are stats from a machine I have I got by running fail2ban-client 
status sshd. I block for much longer than the default.

Status for the jail: sshd
|- Filter
|  |- Currently failed: 0
|  |- Total failed:     211
|  `- File list:        /var/log/auth.log
`- Actions
    |- Currently banned: 4655
    |- Total banned:     4902

Brian

On 10/21/2021 1:51 PM, Colin Law wrote:
> On Thu, 21 Oct 2021 at 21:43, Semih Ozlem <semihozlemlinuxuser at gmail.com> wrote:
>> Hi everyone,
>>
>> I set up an openssh server and I am trying to access that machine remotely (not from the local network. but from another ip address). I get an error (something about port 22).
> What setting needs to be checked and what needs to be done on the
> machine that openssh server is running and on the router that machine
> is connected to, so that openssh server can be accessed remotely?
>
> You need to open port 22 on the router.  But I strongly advise not to
> do that until you have done a lot more research into the perils of
> opening your system up to the internet, and how to minimise the
> danger.
>
> Colin
>