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How to properly configure NAT for IPSec VPN clients on ASA 5510?
Good afternoon, I don’t understand why VPN users don’t see internal resources, I tried everything ...
The config is here:
Result of the command: "show running-config"
: Saved
:
ASA Version 8.2(5)
!
hostname vpn2
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
name 192.168.0.0 localnet
!
interface Ethernet0/0
nameif inside
security-level 0
ip address 192.168.10.10 255.255.255.0
!
interface Ethernet0/1
nameif outside
security-level 0
ip address x.x.x.165 255.255.255.248
!
interface Ethernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface Ethernet0/3
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.2 255.255.255.0
management-only
!
ftp mode passive
same-security-traffic permit inter-interface
access-list VPN_splitTunnelAcl standard permit localnet 255.255.0.0
access-list inside_nat0_outbound extended permit ip localnet 255.255.0.0 192.168.201.0 255.255.255.0
access-list inside_access_in extended permit ip 192.168.10.0 255.255.255.0 192.168.201.0 255.255.255.0
access-list inside_access_in extended permit ip 192.168.10.0 255.255.255.0 any
access-list inside_access_in extended permit ip 192.168.201.0 255.255.255.0 any
pager lines 24
logging asdm informational
mtu management 1500
mtu inside 1500
mtu outside 1500
ip local pool VPN 192.168.201.1-192.168.201.255 mask 255.255.255.0
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (inside) 101 interface
nat (management) 101 0.0.0.0 0.0.0.0
nat (inside) 0 access-list inside_nat0_outbound
static (outside,inside) 192.168.10.0 192.168.201.0 netmask 255.255.255.0
access-group inside_access_in in interface inside
route outside 0.0.0.0 0.0.0.0 x.x.x.161 1
route inside 0.0.0.0 0.0.0.0 192.168.10.1 tunneled
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 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-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 ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
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 security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs group1
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
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
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
anyconnect-essentials
group-policy VPN internal
group-policy VPN attributes
dns-server value 192.168.10.2 8.8.8.8
vpn-tunnel-protocol IPSec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value VPN_splitTunnelAcl
username vpnuser password 7Bdumxv8hUcgjd3b encrypted privilege 0
username vpnuser attributes
vpn-group-policy VPN
tunnel-group VPN type remote-access
tunnel-group VPN general-attributes
address-pool VPN
default-group-policy VPN
tunnel-group VPN ipsec-attributes
pre-shared-key *****
!
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
no call-home reporting anonymous
Cryptochecksum:a434346b011125b22da8cbfac75f1c15
: end
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1. You mixed up name and object/object-group (I don't remember if they were already in 8.2 or not). In any case, the VPN_splitTunnelAcl must explicitly describe the network.
2. Traffic from the internal network to the network allocated for remote access should not be flown. More precisely, it must natitsya "into itself."
3. There are excellent Configuration Examples and Technotes on cisco.com.
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