Chiefttimby
IS-IT--Management
Hola.
Current situation:
- Cisco VPN client connects to ASA outside interface (public IP) and authenticates via Kerberos/LDAP to an internal Windows AD server.
- VPN client PC obtains address from ASA locally defined IP pool, on subnet 172.16.1.0/28.
- VPN client PC cannot ping ANY internal network host on 10.0.0.0/16, not even ASA inside int at 10.0.0.2.
Other device config:
- Internal test host PC 10.0.0.3/16 default GW = 10.0.0.1
- Cisco 2600 route back to VPN client subnet = 172.16.1.0 255.255.255.240 10.0.0.2
The question is, do I need NAT-T if I'm not using the ASA as the Internet gateway? For that purpose I am using a PIX, with the 10.0.0.1 Cisco 2600 as the internal gateway. My ASA config is:
ASA Version 7.2(3)
!
hostname ciscoasa
domain-name domain.com
enable password QrxI7T2E6JEytHJp encrypted
names
!
interface Vlan1
nameif inside
security-level 100
ip address 10.0.0.2 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 200.200.200.1 255.255.255.240
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
passwd jaIk.zJh96M5BUFH encrypted
ftp mode passive
clock timezone EST -5
clock summer-time EDT recurring
dns server-group DefaultDNS
domain-name domain.com
object-group network LAN
description Inside subnet
network-object 10.0.0.0 255.255.255.0
object-group network VPNGroup
description VPN Client Network
network-object 172.16.1.0 255.255.255.240
access-list Remote_splitTunnelAcl standard permit 10.0.0.0 255.255.255.0
access-list Remote_splitTunnelAcl standard permit 172.16.1.0 255.255.255.240
access-list Remote extended permit esp object-group VPNGroup object-group LAN
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool =VPNClients 172.16.1.1-172.16.1.7 mask 255.255.255.240
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-523.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
route inside 0.0.0.0 0.0.0.0 10.0.0.1 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 uauth 0:05:00 absolute
aaa-server Authent protocol kerberos
aaa-server Authent host 10.0.0.15
kerberos-realm DOMAIN.COM
aaa-server Author protocol ldap
aaa-server Author host 10.0.0.15
ldap-base-dn ou=TO-Users
ldap-scope onelevel
ldap-naming-attribute uid
server-type microsoft
http server enable
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto dynamic-map outside_dyn_map 20 set pfs
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto dynamic-map outside_dyn_map 40 set pfs
crypto dynamic-map outside_dyn_map 40 set transform-set ESP-3DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 86400
no vpn-addr-assign aaa
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 1440
ssh timeout 5
console timeout 0
management-access inside
dhcpd auto_config outside
!
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
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
!
service-policy global_policy global
group-policy T-Remotes internal
group-policy T-Remotes attributes
wins-server value 10.0.0.15
dns-server value 10.0.0.15
vpn-tunnel-protocol IPSec l2tp-ipsec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value T-Remotes
default-domain value sub.domain.com
address-pools value VPNClients
tunnel-group T-Remotes type ipsec-ra
tunnel-group T-Remotes general-attributes
address-pool VPNClients
authentication-server-group Authent
authorization-server-group TAuthor
default-group-policy T-Remotes
tunnel-group T-Remotes ipsec-attributes
pre-shared-key *
prompt hostname context
Cryptochecksum:02cb73b98d6c07d219e86bd9082ee56e
: end
Gracias!
Current situation:
- Cisco VPN client connects to ASA outside interface (public IP) and authenticates via Kerberos/LDAP to an internal Windows AD server.
- VPN client PC obtains address from ASA locally defined IP pool, on subnet 172.16.1.0/28.
- VPN client PC cannot ping ANY internal network host on 10.0.0.0/16, not even ASA inside int at 10.0.0.2.
Other device config:
- Internal test host PC 10.0.0.3/16 default GW = 10.0.0.1
- Cisco 2600 route back to VPN client subnet = 172.16.1.0 255.255.255.240 10.0.0.2
The question is, do I need NAT-T if I'm not using the ASA as the Internet gateway? For that purpose I am using a PIX, with the 10.0.0.1 Cisco 2600 as the internal gateway. My ASA config is:
ASA Version 7.2(3)
!
hostname ciscoasa
domain-name domain.com
enable password QrxI7T2E6JEytHJp encrypted
names
!
interface Vlan1
nameif inside
security-level 100
ip address 10.0.0.2 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 200.200.200.1 255.255.255.240
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
passwd jaIk.zJh96M5BUFH encrypted
ftp mode passive
clock timezone EST -5
clock summer-time EDT recurring
dns server-group DefaultDNS
domain-name domain.com
object-group network LAN
description Inside subnet
network-object 10.0.0.0 255.255.255.0
object-group network VPNGroup
description VPN Client Network
network-object 172.16.1.0 255.255.255.240
access-list Remote_splitTunnelAcl standard permit 10.0.0.0 255.255.255.0
access-list Remote_splitTunnelAcl standard permit 172.16.1.0 255.255.255.240
access-list Remote extended permit esp object-group VPNGroup object-group LAN
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool =VPNClients 172.16.1.1-172.16.1.7 mask 255.255.255.240
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-523.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
route inside 0.0.0.0 0.0.0.0 10.0.0.1 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 uauth 0:05:00 absolute
aaa-server Authent protocol kerberos
aaa-server Authent host 10.0.0.15
kerberos-realm DOMAIN.COM
aaa-server Author protocol ldap
aaa-server Author host 10.0.0.15
ldap-base-dn ou=TO-Users
ldap-scope onelevel
ldap-naming-attribute uid
server-type microsoft
http server enable
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto dynamic-map outside_dyn_map 20 set pfs
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto dynamic-map outside_dyn_map 40 set pfs
crypto dynamic-map outside_dyn_map 40 set transform-set ESP-3DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 86400
no vpn-addr-assign aaa
telnet 0.0.0.0 0.0.0.0 inside
telnet timeout 1440
ssh timeout 5
console timeout 0
management-access inside
dhcpd auto_config outside
!
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
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
!
service-policy global_policy global
group-policy T-Remotes internal
group-policy T-Remotes attributes
wins-server value 10.0.0.15
dns-server value 10.0.0.15
vpn-tunnel-protocol IPSec l2tp-ipsec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value T-Remotes
default-domain value sub.domain.com
address-pools value VPNClients
tunnel-group T-Remotes type ipsec-ra
tunnel-group T-Remotes general-attributes
address-pool VPNClients
authentication-server-group Authent
authorization-server-group TAuthor
default-group-policy T-Remotes
tunnel-group T-Remotes ipsec-attributes
pre-shared-key *
prompt hostname context
Cryptochecksum:02cb73b98d6c07d219e86bd9082ee56e
: end
Gracias!