<div dir="ltr"> Bom dia amigos, <div><br></div><div> Estou tendo problemas com acesso externo via SSH. sempre usei as versões 5 e 6 do CentOS, porem os servidor2s Dell não aceitam mais, somente da 7 em diante. </div><div><br></div><div> Me conecto via OpenVpn e acesso novamente o servidor via SSH pela rede interna, quando vou direto pela internet pede usuario e senha e da erro de senha... mas a senha esta correta pois é a mesma que uso quando acesso pela OpenVpn... </div><div><br></div><div> Regras de firewall (IPTABLES) ok,</div><div> O range 200.0/24 é o alocado ao OpenVpn. Como podem ver fiz até uma regra somente para testes lkiberando o INPUT ao servidor vindo de qualquer origem
$IPTABLES -A INPUT -m state --state NEW -j ACCEPT
</div><div><br></div><div> Acredito ser alguma configuração no .conf do SSH, mas ali já não é muito a minha praia.. No CentOs5 e 6 nunca tive esse problema. </div><div><br></div><div> Fico muito grato pela ajuda de vcs. </div><div><br></div><div>#!/bin/sh --debug<br>###############################################################################<br>## Data 25/01/2020 - Janderson Jetto ##<br>## /etc/init.d/firewall ##<br>###############################################################################<br><br>#Variaveis<br>IPTABLES=/sbin/iptables<br>IFEXT=em1<br>IFINT=em2<br>VPN01=192.168.21.254<br>DARIUS=191.252.201.92<br>INTERNA=<a href="http://192.168.21.0/24">192.168.21.0/24</a><br>DMZ=<a href="http://10.10.21.0/24">10.10.21.0/24</a><br><br><br>######################<br><br>$IPTABLES -L -n | awk '/Chain/ {printf "iptables -F %s\n", $2;}'|/bin/sh<br>$IPTABLES -t nat -L -n | awk '/Chain/ {printf "iptables -t nat -F %s\n", $2;}'|/bin/sh<br>$IPTABLES -t mangle -L -n | awk '/Chain/ {printf "iptables -t mangle -F %s\n", $2;}'|/bin/sh<br>$IPTABLES -X<br>$IPTABLES -t nat -X<br>$IPTABLES -t mangle -X<br><br>$IPTABLES -P OUTPUT ACCEPT<br>$IPTABLES -P INPUT DROP<br>$IPTABLES -P FORWARD DROP<br><br>$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT<br>$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT<br>$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT<br><br># Registro de LOGS<br>$IPTABLES -A INPUT -p tcp -j LOG --log-prefix "INPUT TCP: " --log-ip-options<br>$IPTABLES -A INPUT -p udp -j LOG --log-prefix "INPUT UDP: " --log-ip-options<br>$IPTABLES -A INPUT -p icmp -j LOG --log-prefix "INPUT ICMP: " --log-ip-options<br><br>$IPTABLES -A FORWARD -p tcp -j LOG --log-prefix "FORWARD TCP: " --log-ip-options<br>$IPTABLES -A FORWARD -p udp -j LOG --log-prefix "FORWARD UDP: " --log-ip-options<br>$IPTABLES -A FORWARD -p icmp -j LOG --log-prefix "FORWARD ICMP: " --log-ip-options<br><br>#Script Secundario<br>#source /usr/local/scripts/firewall/regras_usuario<br><br>################################################################################################<br># #<br># #<br># ATENCAO NUNCA ALTERAR DESTA JANELA ACIMA. SE ALTERAR UMA VARIAVEL ALTERA TODO O SCRIPT #<br>#################################################################################################<br><br># REGRAS USUARIOS<br><br># GERENCIA<br>#<br><b>$IPTABLES -A INPUT -m state --state NEW -j ACCEPT</b><br>$IPTABLES -A INPUT -m state --state NEW -s 191.252.201.92 -j ACCEPT<br>$IPTABLES -A INPUT -m state --state NEW -s 192.168.200.9 -p tcp --dport 22 -j ACCEPT<br><b>$IPTABLES -A INPUT -m state --state NEW -s 192.168.200.5 -j ACCEPT</b><br>$IPTABLES -A INPUT -m state --state NEW -s 192.168.21.10 -p tcp --dport 22 -j ACCEPT<br>#<br>$IPTABLES -A FORWARD -m state --state NEW -s 192.168.200.5 -j ACCEPT<br>################################################################<br>#<br># MANGLE<br>#<br>$IPTABLES -t mangle -A PREROUTING -d <a href="http://192.168.0.0/16">192.168.0.0/16</a> -j RETURN<br>$IPTABLES -t mangle -A PREROUTING -d <a href="http://172.16.0.0/12">172.16.0.0/12</a> -j RETURN<br>$IPTABLES -t mangle -A OUTPUT -d <a href="http://192.168.0.0/16">192.168.0.0/16</a> -j RETURN<br>$IPTABLES -t mangle -A OUTPUT -d <a href="http://172.16.0.0/12">172.16.0.0/12</a> -j RETURN<br>################################################################<br>#<br># INTERNET - CORREIO<br>#<br>$IPTABLES -t nat -A POSTROUTING -p tcp -m multiport --dport 465,587,993,995 -o em1 -j SNAT --to-source 192.168.21.254<br>$IPTABLES -A FORWARD -m state --state NEW -p tcp -m multiport --dport 465,587,993,995 -j ACCEPT<br>#<br>################################################################<br>#<br># PROXY<br>#<br>$IPTABLES -A INPUT -m state --state NEW -s $INTERNA -p tcp --dport 3128 -j ACCEPT<br>$IPTABLES -A INPUT -m state --state NEW -s $DMZ -p tcp --dport 3128 -j ACCEPT<br>$IPTABLES -t nat -A POSTROUTING -s 192.168.21.253 -o em1 -j SNAT --to-source 192.168.21.254<br>$IPTABLES -A FORWARD -m state --state NEW -s 192.168.21.253 -j ACCEPT<br>#<br>################################################################<br></div></div>