Eu tenho um roteador Cisco ASA executando o firmware 8.2 (5) que hospeda uma LAN interna em 192.168.30.0/24.
Eu usei o Assistente de VPN para configurar o acesso ao L2TP e posso conectar-me perfeitamente a partir de uma caixa do Windows e fazer ping de hosts atrás do roteador VPN.
No entanto, quando conectado à VPN, não consigo mais acessar minha Internet ou navegar em páginas da web. Eu gostaria de ser capaz de acessar a VPN, e também navegar na internet ao mesmo tempo - eu entendo isso é chamado de tunelamento dividido (ter marcado a configuração no assistente, mas sem efeito) e se assim for como faço isso?
Alternativamente, se dividir o tunelamento é uma tarefa difícil de configurar, então fazer com que o cliente VPN conectado tenha acesso à Internet a partir do ASA O IP da WAN seria OK.
names
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Vlan1
nameif inside
security-level 100
ip address 192.168.30.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 208.74.158.58 255.255.255.252
!
ftp mode passive
access-list inside_nat0_outbound extended permit ip any 10.10.10.0 255.255.255.128
access-list inside_nat0_outbound extended permit ip 192.168.30.0 255.255.255.0 192.168.30.192 255.255.255.192
access-list DefaultRAGroup_splitTunnelAcl standard permit 192.168.30.0 255.255.255.0
access-list DefaultRAGroup_splitTunnelAcl_1 standard permit 192.168.30.0 255.255.255.0
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool LANVPNPOOL 192.168.30.220-192.168.30.249 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 1 192.168.30.0 255.255.255.0
route outside 0.0.0.0 0.0.0.0 208.74.158.57 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.30.0 255.255.255.0 inside
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec transform-set TRANS_ESP_3DES_SHA esp-3des esp-sha-hmac
crypto ipsec transform-set TRANS_ESP_3DES_SHA mode transport
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5 TRANS_ESP_3DES_SHA
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
group-policy DefaultRAGroup internal
group-policy DefaultRAGroup attributes
dns-server value 192.168.30.3
vpn-tunnel-protocol l2tp-ipsec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value DefaultRAGroup_splitTunnelAcl_1
username user password Cj7W5X7wERleAewO8ENYtg== nt-encrypted privilege 0
tunnel-group DefaultRAGroup general-attributes
address-pool LANVPNPOOL
default-group-policy DefaultRAGroup
tunnel-group DefaultRAGroup ipsec-attributes
pre-shared-key *****
tunnel-group DefaultRAGroup ppp-attributes
no authentication chap
authentication ms-chap-v2
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
!
service-policy global_policy global
prompt hostname context
: end
Qual software cliente você está usando para se conectar? O tunelamento dividido está configurado, mas acredito que você precisará estar conectado ao software cliente da Cisco para que ele funcione.
De qualquer forma, para que o tráfego da Internet do cliente VPN seja disponibilizado para a internet, parece que tudo que você precisa é:
same-security-traffic permit intra-interface
nat (outside) 1 192.168.30.0 255.255.255.0