[CentOS] Running SSH on a different port

Stephen Wong stephen at wongstephen.com
Sat Oct 24 14:29:16 UTC 2009


Change the port statement in /etc/ssh/sshd_config and restart sshd

Alternatively, you can make a port direction on your firewall, say,
from TCP port 1234 to internal IP 22.  Then, you don't need to change
the server config.

My 2 cents.

Stephen WONG @ Hong Kong



On Sat, Oct 24, 2009 at 9:23 PM, Oliver Ransom <oliver at ransom.com.au> wrote:
>
> On 24/10/2009, at 11:40 PM, Miguel Medalha wrote:
>
>>
>>> How does one switch ssh ports? What is a good port to use? What
>>> ramifications does it have when I need to ssh in? Is it as simple as
>>> ssh user at hots:port?
>>>
>>
>> In /etc/ssh/sshd_config replace "port 22" with "port <whatever high
>> port
>> (> 1024) you like>"
>>
>> Then configure your ssh clients accordingly.
>>
>> I was having my logs filled with *literally* hundreds of connection
>> attempts to port 22 every single day. Since I moved ssh to another
>> port
>> that stopped.
>
> I don't know if it is viable in your case but using /etc/hosts.allow
> and deny helps if you know what IPs are going to need SSH access.
>
>>
>> Also, disable password authentication and use public/private key pairs
>> as certification.
>>
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