Re: Undesired ssh login attempts
Reco wrote:
> You mean that all these connections originate from 197.159.128.171?
> "iptables -I INPUT -s 197.159.128.171/29 -j DROP" will take care of it.
>
No this was just an example - they come from different IPs. Some days
nothing, some days it is nothing.
> While you're at it, write an abuse letter to Jonathan Lamptey - he? owns
> problematic IP range according to AFRINIC.
>
>
>> I think both are secure: for ssh no users with easy password allowed to
>> login
>
> If you have password-enabled ssh with stock Ciphers, MACs, and Kex'es
> enabled, and your only protection is non-standard ssh port - then you
> are doing it wrong.
>
> Set these to /etc/ssh/sshd_config, and watch all those script-kiddies
> cry as they won't be able to connect to you at all:
>
> Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com
> MACs
>
hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com
> KexAlgorithms
> curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
>
> And forbid ssh password authentication. They've invented key-based
> authentication for cases like yours 15 years ago.
>
>
Thanks, this is a good advise I will investigate. In fact I have 2 ssh
servers - one for internal network and one for external. External is
allowed only for 3 users including me. When I upgraded to jessie or to
stretch I also updated the cipher rules, but I will double check.
>> and apache - no pages or stuff that would compromise.
>
> As long as this apache serves static HTML only then you're probably safe
> indeed.
Ok thanks for that - I think it is true as it is local server and there is
nothing php - but just documentation.
thanks
regards
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