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Multi-Site VPN Config - Correct?

seanwaite
Level 1
Level 1

I am in the process of setting up a multi site VPN, the first tunnel (VPN1) is up and running fine. It was when I went to do the second tunnel that I encountered issues. I believe I resolved them, and that the problem was I had an ACL that was reversed. With our local network being 10.10.6.0/24 I had "....extended permit ip 10.150.0.0 255.255.128.0 10.10.6.0 255.255.255.0". 10.150.0.0/17 was the remote network, that I had reversed in the ACL, which is a network that does not exist locally. So, then this explained why there was no outbound traffic coming from our network. Before I schedule the next time we set these up I would like to insure I have this down right. Below is the current config. I don't believe there is anything else I need to do to differentiate the seperate VPNs. Each tunnel should have a unique ACL that matches the crypto map, then that network should be included in the same "no nat ACL".

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

1.) Local LAN: 10.10.6.0/23

2.) Remote LAN #1: 192.168.100.0/24

3.) Remote LAN#2: 10.150.0.0/17

4.) Remote LAN#3: 10.1.1.0/24

VPN #1
access-list REMOTE_SITE extended permit ip 10.10.6.0 255.255.255.0 192.168.100.0 255.255.255.0

access-list Outside_VPN1 extended permit ip 10.10.6.0 255.255.255.0 192.168.100.0 255.255.255.0

crypto map OUTSIDE_MAP 1 match address Outside_VPN1

crypto map OUTSIDE_MAP 1 set pfs group1

crypto map OUTSIDE_MAP 1 set peer 70.***.***.***

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

tunnel-group 70.***.***.*** type ipsec-l2l

tunnel-group 70.***.***.*** ipsec-attributes

pre-shared-key *****

VPN #2

access-list REMOTE_SITE extended permit ip 10.10.6.0 255.255.255.0 10.150.0.0 255.255.128.0

access-list Outside_VPN2 extended permit ip 10.10.6.0 255.255.255.0 10.150.0.0 255.255.128.0

crypto map OUTSIDE_MAP 2 match address Outside_VPN2

crypto map OUTSIDE_MAP 2 set peer 212.***.***.***

crypto map OUTSIDE_MAP 2 set transform-set ESP-3DES-MD5

tunnel-group 212.***.***.*** type ipsec-l2l

tunnel-group 212.***.***.*** ipsec-attributes

pre-shared-key *****

VPN #3

access-list REMOTE_SITE extended permit ip 10.10.6.0 255.255.255.0 10.1.1.0 255.255.255.0

access-list Outside_VPN3 extended permit ip 10.10.6.0 255.255.255.0 10.1.1.0 255.255.255.0

crypto map OUTSIDE_MAP 3 match address Outside_VPN3

crypto map OUTSIDE_MAP 3 set peer 201.***.***.***

crypto map OUTSIDE_MAP 3 set transform-set ESP-3DES-MD5

tunnel-group 201.***.***.*** type ipsec-l2l

tunnel-group 201.***.***.*** ipsec-attributes

pre-shared-key *****

access-list REMOTE_SITE extended permit ip 10.10.6.0 255.255.255.0 192.168.0.0 255.255.0.0

access-list REMOTE_RA extended permit ip any 192.168.0.0 255.255.0.0

crypto map OUTSIDE_MAP 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP

ip local pool L2TP 192.168.205.1-192.168.205.20 mask 255.255.0.0

global (Outside) 1 215.**.**.***

nat (Inside) 0 access-list REMOTE_SITE

nat (Inside) 1 10.10.6.0 255.255.255.0

static (Inside,Outside) 215.**.**.*** 10.10.6.2 netmask 255.255.255.255

static (Inside,Outside) 215.**.**.*** 10.10.6.3 netmask 255.255.255.255

static (Inside,Outside) 215.**.**.*** 10.10.6.4 netmask 255.255.255.255

static (Inside,Outside) 215.**.**.*** 10.10.6.5 netmask 255.255.255.255

access-group ACL_IN in interface Outside

route Outside 0.0.0.0 0.0.0.0 215.**.**.*** 1

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-128-SHA esp-aes esp-sha-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 transform-set TRANS_ESP_3DES_MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set TRANS_ESP_3DES_MD5 mode transport
crypto ipsec transform-set TRANS_ESP_AES128_SHA esp-aes esp-sha-hmac
crypto ipsec transform-set TRANS_ESP_AES128_SHA mode transport
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set TRANS_ESP_3DES_SHA TRANS_ESP_3DES_MD5 TRANS_ESP_AES128_SHA ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5

crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto map OUTSIDE_MAP interface Outside

crypto isakmp enable Outside
crypto isakmp enable Inside
crypto isakmp enable management
crypto isakmp policy 10

authentication pre-share
encryption aes
hash sha
group 1
lifetime 28800
crypto isakmp policy 30
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 40
authentication pre-share
encryption aes
hash sha
group 1
lifetime 86400
crypto isakmp policy 50
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 86400
crypto isakmp policy 70
authentication pre-share
encryption 3des
hash md5
group 1
lifetime 86400

3 Replies 3

apothula
Level 1
Level 1

Hi Sean,

Bull's eye.

Everything looks perfect.

1 question though,

Do you want to provide access to all these remote sites via for your L2TP clients ??

Cheers,

Avinash.

Avinas, thanks for the reply.

The  L2TP line is not final, I had that in for testing purposes, so the final will be adjusted to 192.168.205.0/24 to reflect the L2TP IP pool.

Good to know that the config looks good, gives me more confidence to go with through with this.

Thanks, Sean

Hi Sean,

I guess we can work on the L2TP issue another day

Please mark this discussion as resolved, if there is nothing else we need to look into

Cheers,

Avinash.

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