/var/log/auth

Jun 10 20:28:07 firewall sshd[15600]: error: Could not get shadow information for NOUSER

Alguém sabe o motivo deste erro ?

nossa.

é programa tentando logar no sistema por brute force.

Olhei agora o info.

un 10 20:27:35 firewall sshd[15588]: Failed password for invalid user play from 210.0.178.146 port 48150 ssh2
Jun 10 20:27:39 firewall sshd[15590]: Invalid user open from 210.0.178.146
Jun 10 20:27:39 firewall sshd[15590]: Failed password for invalid user open from 210.0.178.146 port 48387 ssh2
Jun 10 20:27:44 firewall sshd[15592]: Invalid user dulap from 210.0.178.146
Jun 10 20:27:44 firewall sshd[15592]: Failed password for invalid user dulap from 210.0.178.146 port 48639 ssh2
Jun 10 20:27:48 firewall sshd[15594]: Invalid user if from 210.0.178.146
Jun 10 20:27:48 firewall sshd[15594]: Failed password for invalid user if from 210.0.178.146 port 48894 ssh2
Jun 10 20:27:52 firewall sshd[15596]: Invalid user uk from 210.0.178.146
Jun 10 20:27:52 firewall sshd[15596]: Failed password for invalid user uk from 210.0.178.146 port 49131 ssh2
Jun 10 20:27:57 firewall sshd[15598]: Invalid user us from 210.0.178.146
Jun 10 20:27:57 frigoking sshd[15598]: Failed password for invalid user us from 210.0.178.146 port 49370 ssh2
Jun 10 20:28:07 firewall sshd[15600]: Invalid user alinus from 210.0.178.146
Jun 10 20:28:07 firewall sshd[15600]: Failed password for invalid user alinus from 210.0.178.146 port 49605 ssh2



vou mudar a porta do ssh.
Essa semana eu instalo o snort + guardian...

Alguém sabe quanto precisa de ram pra rodar legal eles ?