Essa configuração permite que redes privadas atrás de três caixas do Cisco Secure PIX Firewall sejam conectadas por túneis VPN pela Internet ou por qualquer rede pública que use IPsec. Cada uma das três redes tem conectividade com as outras duas redes. Neste cenário, a Network Address Translation (NAT) é necessária para conexões à Internet pública. No entanto, o NAT não é necessário para o tráfego entre as três intranets, que podem ser transmitidas usando um túnel VPN sobre a Internet pública.
Para que o IPsec funcione, você deve ter conectividade de ponto de extremidade de túnel a ponto de extremidade de túnel antes de iniciar esta configuração.
Essa configuração foi desenvolvida e testada com o PIX Firewall versão 6.1(2).
Observação: o comando show version deve mostrar que a criptografia está habilitada.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Consulte as Convenções de Dicas Técnicas da Cisco para obter mais informações sobre convenções de documentos.
Nesta seção, você encontrará informações para configurar os recursos descritos neste documento.
Nota: Use a Command Lookup Tool (somente clientes registrados) para obter mais informações sobre os comandos usados nesta seção.
Este documento utiliza a seguinte configuração de rede:
Este documento utiliza as seguintes configurações:
Configuração do PIX 1 |
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PIX Version 6.1(2) nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password 8Ry2YjIyt7RRXU24 encrypted passwd 2KFQnbNIdI.2KYOU encrypted hostname pix_1 fixup protocol ftp 21 fixup protocol http 80 fixup protocol h323 1720 fixup protocol rsh 514 fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol sip 5060 names !--- Traffic to PIX 2 private network: access-list 120 permit ip 10.1.1.0 255.255.255.0 10.2.2.0 255.255.255.0 !--- Traffic to PIX 3 private network: access-list 130 permit ip 10.1.1.0 255.255.255.0 10.3.3.0 255.255.255.0 !--- Do not perform NAT for traffic to !--- other PIX Firewall private networks: access-list 100 permit ip 10.1.1.0 255.255.255.0 10.2.2.0 255.255.255.0 access-list 100 permit ip 10.1.1.0 255.255.255.0 10.3.3.0 255.255.255.0 pager lines 24 logging on no logging timestamp no logging standby no logging console no logging monitor no logging buffered no logging trap no logging history logging facility 20 logging queue 512 interface ethernet0 auto interface ethernet1 auto mtu outside 1500 mtu inside 1500 ip address outside 172.18.124.153 255.255.255.0 ip address inside 10.1.1.1 255.255.255.0 ip audit info action alarm ip audit attack action alarm no failover failover timeout 0:00:00 failover poll 15 failover ip address outside 0.0.0.0 failover ip address inside 0.0.0.0 arp timeout 14400 !--- Do not perform NAT for traffic to other PIX Firewalls: nat (inside) 0 access-list 100 route outside 0.0.0.0 0.0.0.0 172.18.124.1 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00 timeout uauth 0:05:00 absolute aaa-server TACACS+ protocol tacacs+ aaa-server RADIUS protocol radius no snmp-server location no snmp-server contact snmp-server community public snmp-server enable traps floodguard enable sysopt connection permit-ipsec no sysopt route dnat crypto ipsec transform-set myset esp-des esp-md5-hmac !--- IPsec configuration for tunnel to PIX 2: crypto map newmap 20 ipsec-isakmp crypto map newmap 20 match address 120 crypto map newmap 20 set peer 172.18.124.154 crypto map newmap 20 set transform-set myset !--- IPsec configuration for tunnel to PIX 3: crypto map newmap 30 ipsec-isakmp crypto map newmap 30 match address 130 crypto map newmap 30 set peer 172.18.124.157 crypto map newmap 30 set transform-set myset crypto map newmap interface outside isakmp enable outside isakmp key ******** address 172.18.124.154 netmask 255.255.255.255 no-xauth no-config-mode isakmp key ******** address 172.18.124.157 netmask 255.255.255.255 no-xauth no-config-mode isakmp identity address isakmp policy 10 authentication pre-share isakmp policy 10 encryption des isakmp policy 10 hash md5 isakmp policy 10 group 1 isakmp policy 10 lifetime 1000 telnet timeout 5 ssh timeout 5 terminal width 80 Cryptochecksum:436c96500052d0276324b9ef33221b2d : end [OK] |
Configuração do PIX 2 |
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PIX Version 6.1(2) nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password 8Ry2YjIyt7RRXU24 encrypted passwd 2KFQnbNIdI.2KYOU encrypted hostname pix_2 fixup protocol ftp 21 fixup protocol http 80 fixup protocol h323 1720 fixup protocol rsh 514 fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol sip 5060 names !--- Traffic to PIX 1: access-list 110 permit ip 10.2.2.0 255.255.255.0 10.1.1.0 255.255.255.0 !--- Traffic to PIX 3: access-list 130 permit ip 10.2.2.0 255.255.255.0 10.3.3.0 255.255.255.0 !--- Do not perform NAT for traffic to other PIX Firewalls: access-list 100 permit ip 10.2.2.0 255.255.255.0 10.1.1.0 255.255.255.0 access-list 100 permit ip 10.2.2.0 255.255.255.0 10.3.3.0 255.255.255.0 pager lines 24 logging on no logging timestamp no logging standby no logging console no logging monitor no logging buffered no logging trap no logging history logging facility 20 logging queue 512 interface ethernet0 auto interface ethernet1 auto mtu outside 1500 mtu inside 1500 ip address outside 172.18.124.154 255.255.255.0 ip address inside 10.2.2.1 255.255.255.0 ip audit info action alarm ip audit attack action alarm no failover failover timeout 0:00:00 failover poll 15 failover ip address outside 0.0.0.0 failover ip address inside 0.0.0.0 arp timeout 14400 !--- Do not perform NAT for traffic to other PIX Firewalls: nat (inside) 0 access-list 100 route outside 0.0.0.0 0.0.0.0 172.18.124.1 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00 timeout uauth 0:05:00 absolute aaa-server TACACS+ protocol tacacs+ aaa-server RADIUS protocol radius no snmp-server location no snmp-server contact snmp-server community public no snmp-server enable traps floodguard enable sysopt connection permit-ipsec no sysopt route dnat crypto ipsec transform-set myset esp-des esp-md5-hmac !--- IPsec configuration for tunnel to PIX 1: crypto map newmap 10 ipsec-isakmp crypto map newmap 10 match address 110 crypto map newmap 10 set peer 172.18.124.153 crypto map newmap 10 set transform-set myset !--- IPsec configuration for tunnel to PIX 3: crypto map newmap 30 ipsec-isakmp crypto map newmap 30 match address 130 crypto map newmap 30 set peer 172.18.124.157 crypto map newmap 30 set transform-set myset crypto map newmap interface outside isakmp enable outside isakmp key ******** address 172.18.124.153 netmask 255.255.255.255 no-xauth no-config-mode isakmp key ******** address 172.18.124.157 netmask 255.255.255.255 no-xauth no-config-mode isakmp identity address isakmp policy 10 authentication pre-share isakmp policy 10 encryption des isakmp policy 10 hash md5 isakmp policy 10 group 1 isakmp policy 10 lifetime 1000 telnet timeout 5 ssh timeout 5 terminal width 80 Cryptochecksum:aef12453a0ea29b592dd0d395de881f5 : end |
Configuração do PIX 3 |
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PIX Version 6.1(2) nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password 8Ry2YjIyt7RRXU24 encrypted passwd 2KFQnbNIdI.2KYOU encrypted hostname pix_3 fixup protocol ftp 21 fixup protocol http 80 fixup protocol h323 1720 fixup protocol rsh 514 fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol sip 5060 names !--- IPsec configuration for tunnel to PIX 1: access-list 110 permit ip 10.3.3.0 255.255.255.0 10.1.1.0 255.255.255.0 !--- IPsec configuration for tunnel to PIX 2: access-list 120 permit ip 10.3.3.0 255.255.255.0 10.2.2.0 255.255.255.0 !--- Do not perform NAT for traffic to other PIX Firewalls: access-list 100 permit ip 10.3.3.0 255.255.255.0 10.2.2.0 255.255.255.0 access-list 100 permit ip 10.3.3.0 255.255.255.0 10.1.1.0 255.255.255.0 pager lines 24 logging on no logging timestamp no logging standby no logging console no logging monitor no logging buffered no logging trap no logging history logging facility 20 logging queue 512 interface ethernet0 auto interface ethernet1 auto mtu outside 1500 mtu inside 1500 ip address outside 172.18.124.157 255.255.255.0 ip address inside 10.3.3.1 255.255.255.0 ip audit info action alarm ip audit attack action alarm no failover failover timeout 0:00:00 failover poll 15 failover ip address outside 0.0.0.0 failover ip address inside 0.0.0.0 arp timeout 14400 !--- Do not perform NAT for traffic to other PIX Firewalls: nat (inside) 0 access-list 100 route outside 0.0.0.0 0.0.0.0 172.18.124.1 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00 timeout uauth 0:05:00 absolute aaa-server TACACS+ protocol tacacs+ aaa-server RADIUS protocol radius no snmp-server location no snmp-server contact snmp-server community public no snmp-server enable traps floodguard enable sysopt connection permit-ipsec no sysopt route dnat crypto ipsec transform-set myset esp-des esp-md5-hmac !--- IPsec configuration for tunnel to PIX 1: crypto map newmap 10 ipsec-isakmp crypto map newmap 10 match address 110 crypto map newmap 10 set peer 172.18.124.153 crypto map newmap 10 set transform-set myset !--- IPsec configuration for tunnel to PIX 2: crypto map newmap 20 ipsec-isakmp crypto map newmap 20 match address 120 crypto map newmap 20 set peer 172.18.124.154 crypto map newmap 20 set transform-set myset crypto map newmap interface outside isakmp enable outside isakmp key ******** address 172.18.124.153 netmask 255.255.255.255 no-xauth no-config-mode isakmp key ******** address 172.18.124.154 netmask 255.255.255.255 no-xauth no-config-mode isakmp identity address isakmp policy 10 authentication pre-share isakmp policy 10 encryption des isakmp policy 10 hash md5 isakmp policy 10 group 1 isakmp policy 10 lifetime 1000 telnet timeout 5 ssh timeout 5 terminal width 80 Cryptochecksum:e6ad75852dff21efdb2d24cc95ffbe1c : end [OK] |
No momento, não há procedimento de verificação disponível para esta configuração.
Esta seção fornece informações que podem ser usadas para o troubleshooting da sua configuração. Consulte Troubleshooting do PIX para Passar o Tráfego de Dados em um Túnel IPsec Estabelecido para obter mais informações.
Nota:Consulte Informações Importantes sobre Comandos de Depuração antes de usar comandos debug.
Comandos debug
Use esses comandos no PIX, com os comandos logging monitor debugging ou logging console debugging em execução.
debug crypto ipsec — Depura o processamento do IPsec.
debug crypto isakmp — Depura o processamento do ISAKMP (Internet Security Association and Key Management Protocol).
debug crypto engine — Exibe mensagens de depuração sobre mecanismos de criptografia, que executam criptografia e descriptografia.
comandos clear
Para limpar as associações de segurança (SAs), use esses comandos no modo de configuração do PIX.
clear [crypto] ipsec sa — Exclui as SAs IPsec ativas. A palavra-chave crypto é opcional.
clear [crypto] isakmp sa — Exclui as SAs ativas do Internet Key Exchange (IKE). A palavra-chave crypto é opcional.
Observação: para que o IPsec funcione, você deve ter conectividade do ponto final do túnel ao ponto final do túnel antes de iniciar esta configuração.
Revisão | Data de publicação | Comentários |
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1.0 |
30-Sep-2008 |
Versão inicial |