Access to other sites from vpn client connection

cadenamovitel · ‎10-04-2012

Hello,

I have the following scenario:

I have 30+ sites connected to 5510 betwenn bidirectional VPN. All computers from any site can acess 192.168.100.0/24 lan and vice-versa.

ASA 5510 offers external client connection (using cisco vpn client), and connecting to it, remote client can access 192.168.100.0/24 LAN.

But now I want that remote client access to the other sites throught his connection.

The connection assigns an ip of 10.1.50.0/24 to that remote clients, but they cannot reach, for example, 192.168.0.1.

I'm a bit lost with which NAT translation should I use, so if you could help me I would appreciate it.

(ASA 5505 are configured to accept remote VPN clients connections too, and assign them an IP from 10.1.50.0/24; I don't know if it could be a problem).

Thanks.

Julio Carvajal · ‎10-04-2012

Hello Jordi,

To make this happen you need to configure some stuff:

same-security-traffic permit intra-interface

Are you running 8.4 (if yes)

object network VPN_clients

subnet 10.1.50.0 255.255.255.0

object network Site1

subnet 192.168.0.0 255.255.0

nat (outside,outside) source static VPN_clients VPN_clients destination static Site1 Site1

nat (outside,outside) source static Site1 Site1 destination static VPN_clients VPN_clients

Then if you have split-tunnel on your remote access client you will need to add those VPN sites there as well

Regards,

Any other question..Sure...Just remember to rate all of the helpful posts

Julio

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

cadenamovitel · ‎10-05-2012

Hi Julio, thanks for your answer.

I'm running 8.2(5), so I think that command won't run, as are "past 8.3 version".

I supose I have to put nat rules in the 5510, don't I have to change anything from 5510 (192.168.0.0/24)?

I have split-tunnel, but I don't understand what you mean with "you will need to add those VPN sites there as well".

Thanks,

Jordi.

Julio Carvajal · ‎10-05-2012

Hello Jordi.

So 8.2 speaking

access-list U-Turn permit ip 192.168.0.0 255.255.255.0 10.1.50.0 255.255.255.0

access-list U-Turn permit ip 10.1.50.0 255.255.255.0 192.168.0.0 255.255.255.0

Nat (outside) 1 .access-list U-Turn

global (outside) 1 interface

same-security-traffic permit intra-interface

Now on the Split tunnel for the remote access you should include the other VPN subnets IP

Lets say you have the following Setup

group-policy remote access attributes

split-tunnel-network-list value test

access-list test standard permit 192.168.100.0 255.255.255.0

access-list test standard permit 192.168.0.0 255.255.255.0

access-list test standard permit other_vpn_subnet

Regards,

Any other question..Sure...Just remember to rate all of the helpful posts

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

cadenamovitel · ‎10-08-2012

Hello Julio,

I run the config you told me, but I still cannot ping an inside host of a remote site from an vpn client.

I don't know if I need to do another configuration in ACLs, but I don't see any block.

Here is the config of my 5510, if you see any error please tell me:

names

name 192.168.10.0 site1

name 192.168.11.0 site2

name 192.168.12.0 site3

name 192.168.13.0 siten

!

interface Ethernet0/0

nameif Outside

security-level 0

ip address o.o.o.o 255.255.240.0

!

interface Ethernet0/1

nameif Inside

security-level 100

ip address 192.168.254.1 255.255.255.0

!

interface Ethernet0/2

description LAN/STATE Failover Interface

!

interface Ethernet0/3

shutdown

no nameif

no security-level

no ip address

!

interface Management0/0

nameif management

security-level 100

ip address 192.168.1.1 255.255.255.0

management-only

!

ftp mode passive

clock timezone CEST 1

access-list Outside_1_cryptomap extended permit ip 192.168.254.0 255.255.255.0 site1 255.255.255.0

access-list Inside_nat0_outbound extended permit ip 192.168.254.0 255.255.255.0 site2 255.255.255.0

access-list Inside_nat0_outbound extended permit ip 192.168.254.0 255.255.255.0 site3 255.255.255.0

access-list Inside_nat0_outbound extended permit ip 192.168.254.0 255.255.255.0 siten 255.255.255.0

access-list Inside_nat0_outbound_1 extended permit ip 192.168.254.0 255.255.255.0 site1 255.255.255.0

access-list Inside_nat0_outbound_1 extended permit ip 192.168.254.0 255.255.255.0 site2 255.255.255.0

access-list Inside_nat0_outbound_1 extended permit ip 192.168.254.0 255.255.255.0 site3 255.255.255.0

access-list Inside_nat0_outbound_1 extended permit ip 192.168.254.0 255.255.255.0 siten 255.255.255.0

access-list Outside_2_cryptomap extended permit ip 192.168.254.0 255.255.255.0 site1 255.255.255.0

access-list Outside_3_cryptomap extended permit ip 192.168.254.0 255.255.255.0 site2 255.255.255.0

access-list Outside_4_cryptomap extended permit ip 192.168.254.0 255.255.255.0 site3 255.255.255.0

access-list Outside_5_cryptomap extended permit ip 192.168.254.0 255.255.255.0 siten 255.255.255.0

access-list Inside_access_in extended permit ip 192.168.254.0 255.255.255.0 any

access-list Inside_access_in extended permit tcp host 192.168.254.9 host o.o.o.o eq www

access-list Outside_access_in extended permit ip any any

access-list Outside_access_in extended permit tcp host 192.168.254.9 host o.o.o.o eq www

access-list Inside_nat_static extended permit tcp host 192.168.254.5 eq pop3 any

access-list Inside_nat_static_1 extended permit tcp host 192.168.254.5 eq imap4 any

access-list Inside_nat_static_2 extended permit tcp host 192.168.254.5 eq https any

access-list Inside standard permit 192.168.254.0 255.255.255.0

access-list Outside_cryptomap extended permit ip 192.168.254.0 255.255.255.0 Lloret 255.255.255.0

access-list Inside_nat_static_3 extended permit tcp host 192.168.254.5 eq smtp any

access-list Inside_nat_static_4 extended permit tcp host 192.168.254.5 eq domain any

access-list Inside_nat_static_5 extended permit tcp host 192.168.254.5 eq www any

access-list Inside_nat_static_6 extended permit tcp host 192.168.254.5 eq 135 any

access-list Inside_nat_static_7 extended permit tcp host 192.168.254.5 eq 587 any

access-list Inside_nat_static_8 extended permit tcp host 192.168.254.5 eq 995 any

access-list Inside_nat_static_9 extended permit udp host 192.168.254.5 eq domain any

access-list Inside_nat_static_10 extended permit tcp host 192.168.254.5 eq 993 any

access-list Inside_nat_static_11 remark LDAP GC

access-list Inside_nat_static_11 extended permit tcp host 192.168.254.5 eq 3268 any

access-list Inside_nat_static_12 extended permit tcp host 192.168.254.5 eq ldaps any

access-list Inside_nat_static_13 extended permit tcp host 192.168.254.5 eq 3269 any

pager lines 24

logging enable

logging asdm informational

mtu Outside 1500

mtu Inside 1500

mtu management 1500

ip local pool Pool 10.1.50.1-10.1.50.200 mask 255.255.255.0

failover

failover lan unit secondary

failover lan interface Failover Ethernet0/2

failover key *****

failover link Failover Ethernet0/2

failover interface ip Failover 10.10.10.1 255.255.255.252 standby 10.10.10.2

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_1

nat (Inside) 1 192.168.254.0 255.255.255.0

static (Inside,Outside) tcp interface pop3 access-list Inside_nat_static

static (Inside,Outside) tcp interface imap4 access-list Inside_nat_static_1

static (Inside,Outside) tcp interface https access-list Inside_nat_static_2

static (Inside,Outside) tcp interface smtp access-list Inside_nat_static_3

static (Inside,Outside) tcp interface domain access-list Inside_nat_static_4

static (Inside,Outside) tcp interface www access-list Inside_nat_static_5

static (Inside,Outside) tcp interface 135 access-list Inside_nat_static_6

static (Inside,Outside) tcp interface 587 access-list Inside_nat_static_7

static (Inside,Outside) tcp interface 995 access-list Inside_nat_static_8

static (Inside,Outside) udp interface domain access-list Inside_nat_static_9

static (Inside,Outside) tcp interface 993 access-list Inside_nat_static_10

static (Inside,Outside) tcp interface 3268 access-list Inside_nat_static_11

static (Inside,Outside) tcp interface ldaps access-list Inside_nat_static_12

static (Inside,Outside) tcp interface 3269 access-list Inside_nat_static_13

access-group Outside_access_in in interface Outside

access-group Inside_access_in in interface Inside

route Outside 0.0.0.0 0.0.0.0 o.o.o.o 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

aaa authentication http console LOCAL

aaa authorization command LOCAL

aaa authorization exec authentication-server

http server enable 444

http 192.168.1.0 255.255.255.0 management

http 192.168.254.0 255.255.255.0 Inside

http x.x.x.x 255.255.255.255 Outside

http 10.1.50.0 255.255.255.0 Inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac

crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-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-3DES-MD5 esp-3des esp-md5-hmac

crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac

crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

crypto ipsec transform-set ESP-AES-128-SHA esp-aes 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

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 Outsiap 19 match address Outside_19_cryptomap

crypto map Outside_map 1 match address Outside_1_cryptomap

crypto map Outside_map 1 set pfs

crypto map Outside_map 1 set peer ipsite1

crypto map Outside_map 1 set transform-set ESP-AES-128-SHA

crypto map Outside_map 2 match address Outside_2_cryptomap

crypto map Outside_map 2 set pfs

crypto map Outside_map 2 set peer ipsite2

crypto map Outside_map 2 set transform-set ESP-AES-128-SHA

crypto map Outside_map 3 match address Outside_3_cryptomap

crypto map Outside_map 3 set pfs

crypto map Outside_map 3 set peer ipsite3

crypto map Outside_map 3 set transform-set ESP-AES-128-SHA

crypto map Outside_map 4 match address Outside_4_cryptomap

crypto map Outside_map 4 set pfs

crypto map Outside_map 4 set peer ipsiten

crypto map Outside_map 4 set transform-set ESP-AES-128-SHA

crypto map Outside_map 5 match address Outside_5_cryptomap

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 aes

hash sha

group 5

lifetime 86400

crypto isakmp policy 65535

authentication pre-share

encryption 3des

hash sha

group 2

lifetime none

telnet l.l.l.l 255.255.255.255 Outside

telnet timeout 5

ssh x.x.x.x 255.255.255.255 Outside

ssh timeout 5

console timeout 0

management-access Inside

dhcpd address 192.168.254.100-192.168.254.200 Inside

dhcpd dns 192.168.254.5 interface Inside

dhcpd domain DOMAIN interface Inside

dhcpd enable Inside

!

dhcpd address 192.168.1.2-192.168.1.254 management

!

vpn load-balancing

priority 3

interface lbpublic Outside

interface lbprivate Inside

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept

webvpn

group-policy VPNGroup internal

group-policy VPNGroup attributes

dns-server value 192.168.254.5

vpn-tunnel-protocol IPSec

split-tunnel-policy tunnelspecified

split-tunnel-network-list value Inside

default-domain value domain.net

username vpnuser password ******* encrypted

username vpnuser attributes

service-type remote-access

username admin-user password **** encrypted privilege 15

tunnel-group ipsite1 type ipsec-l2l

tunnel-group ipsite1 ipsec-attributes

pre-shared-key *

tunnel-group ipsite2 type ipsec-l2l

tunnel-group ipsite2 ipsec-attributes

pre-shared-key *

tunnel-group ipsite3 type ipsec-l2l

tunnel-group ipsite3 ipsec-attributes

pre-shared-key *

tunnel-group ipsiten type ipsec-l2l

tunnel-group ipsiten ipsec-attributes

pre-shared-key *

tunnel-group VPNGroup type remote-access

tunnel-group VPNGroup general-attributes

address-pool Pool

default-group-policy VPNGroup

tunnel-group VPNGroup 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

Thank you.