Re: [Fail2ban-users] Can fail2ban work behind an NAT?

[Daniel B. <dan...@in...>]

On 30/04/14 02:46, P.V.Anthony wrote:
> Hi,
> 
> I am new to fail2ban so please bear with me.
> 
> The dovecot server is behind an NAT. In the logs, the ip that is 
> reported is the ip of our router (10.0.0.1). So it will be very hard for 
> fail2ban to work correctly because all logins are showing 10.0.0.1.
> 
> I am suspecting that this is the problem of the router.

yes

> 
> Is this normal behavior?

its reasonably common.

> Any recommendation of routers that will pass 
> the correct ip address of the people trying to login?

looks like from the port forwarding wikipedia page any linux based
router that used DNAT.

> Or is there something I can configure in the CentOS server to show the 
> correct ip address so that I can use fail2ban?

No.