We are setting up an old office building as an offsite data center. The network cosists on a PIX 501 firewall and a 2811 router. I am attempting to setup a GRE tunnel over IPsec back to the main office. The main office consists of a PIX515, a 2821 router, and a 2921 router.
There is also an ASA5510 in our main office that is used as our primary connection for all of our external services and as a GRE endpoint for our other offices. The PIX515 is used to connect our main office clients to the internet and we would like traffic between it and our offsite data center to go across it as well. The default route is to use the ASA. We used policy based routing on the 2821 and 2921 routers to direct the appropriate traffic to the PIX515.
I have attached a PDF that shows a general overview.
Right now I am not able to get the tunnel setup. It appears that the offsite datacenter is sending packets but is not receiving any when I issue the “show crypto ipsec sa” commands on both firewalls. I will show the output of that command below.
Main Office
The external address 198.40.227.50.
The loopback address 10.254.10.6
The tunnel address 10.2.60.1
Offsite Datacenter
The external address 198.40.254.178
The loopback address 10.254.60.6
The tunnel address 10.2.60.2
The main office PIX515 Config (Edited – if I am missing something that you need please let me know).
PIX Version 7.2(2)
!
interface Ethernet0
mac-address 5475.d0ba.5012
nameif outside
security-level 0
ip address 198.40.227.50 255.255.255.240
!
interface Ethernet1
nameif inside
security-level 100
ip address 10.10.10.3 255.255.0.0
!
access-list outside_cryptomap_60 extended permit gre host 10.254.10.6 host 10.254.60.6
access-list outside_cryptomap_60 extended permit ip host 10.254.10.6 host 10.254.60.6
global (outside) 1 interface
nat (outside) 1 10.60.0.0 255.255.0.0
nat (inside) 0 access-list noNat
route outside 0.0.0.0 0.0.0.0 198.40.227.49 1
route inside 10.60.0.0 255.255.0.0 10.10.10.1 1
route inside 10.254.10.6 255.255.255.255 10.10.10.253 1
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto dynamic-map ClientVPN_dyn_map 10 set transform-set ESP-3DES-SHA
crypto map cr-lakeavemap 10 match address outside_cryptomap_60
crypto map cr-lakeavemap 10 set peer 198.40.254.178
crypto map cr-lakeavemap 10 set transform-set ESP-3DES-SHA
crypto map cr-lakeavemap 65535 ipsec-isakmp dynamic ClientVPN_dyn_map
crypto map cr-lakeavemap interface outside
crypto isakmp identity address
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp nat-traversal 20
tunnel-group DefaultRAGroup ipsec-attributes
isakmp keepalive threshold 10 retry 2
tunnel-group 198.40.254.178 type ipsec-l2l
tunnel-group 198.40.254.178 ipsec-attributes
The offsite datacenter PIX501 config (again edited)
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
access-list crvpn permit gre host 10.254.60.6 host 10.254.10.6
access-list crvpn permit ip host 10.254.60.6 host 10.254.10.6
mtu outside 1500
mtu inside 1500
ip address outside 198.40.254.178 255.255.255.240
ip address inside 10.60.10.2 255.255.0.0
route outside 0.0.0.0 0.0.0.0 198.40.254.177 1
route inside 10.2.60.2 255.255.255.255 10.60.10.1 1
route inside 10.254.60.6 255.255.255.255 10.60.10.1 1
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto dynamic-map ClientVPN_dyn_map 10 match address ClientVPN
crypto dynamic-map ClientVPN_dyn_map 10 set transform-set ESP-3DES-SHA
crypto map cr-lakeavemap 10 ipsec-isakmp
crypto map cr-lakeavemap 10 match address crvpn
crypto map cr-lakeavemap 10 set peer 198.40.227.50
crypto map cr-lakeavemap 10 set transform-set ESP-3DES-SHA
crypto map cr-lakeavemap 65535 ipsec-isakmp dynamic ClientVPN_dyn_map
crypto map cr-lakeavemap client authentication LOCAL
crypto map cr-lakeavemap interface outside
isakmp enable outside
isakmp key ******** address 198.40.227.50 netmask 255.255.255.255
isakmp identity address
isakmp keepalive 10
isakmp nat-traversal 20
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption 3des
isakmp policy 10 hash sha
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
Output of the “show crypto ipsec sa” command
From the main office
Crypto map tag: cr-lakeavemap, seq num: 10, local addr: 198.40.227.50
access-list outside_cryptomap_60 permit gre host 10.254.10.6 host 10.254.60.6
local ident (addr/mask/prot/port): (10.254.10.6/255.255.255.255/47/0)
remote ident (addr/mask/prot/port): (10.254.60.6/255.255.255.255/47/0)
current_peer: 198.40.254.178
#pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0
#pkts decaps: 18867, #pkts decrypt: 18867, #pkts verify: 18867
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts comp failed: 0, #pkts decomp failed: 0
#pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0
#PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
#send errors: 0, #recv errors: 0
local crypto endpt.: 198.40.227.50, remote crypto endpt.: 198.40.254.178
path mtu 1500, ipsec overhead 58, media mtu 1500
current outbound spi: D78E63C9
inbound esp sas:
spi: 0x5D63434C (1566786380)
transform: esp-3des esp-sha-hmac none
in use settings ={L2L, Tunnel, }
slot: 0, conn_id: 2, crypto-map: cr-lakeavemap
sa timing: remaining key lifetime (kB/sec): (4274801/7527)
IV size: 8 bytes
replay detection support: Y
outbound esp sas:
spi: 0xD78E63C9 (3616433097)
transform: esp-3des esp-sha-hmac none
in use settings ={L2L, Tunnel, }
slot: 0, conn_id: 2, crypto-map: cr-lakeavemap
sa timing: remaining key lifetime (kB/sec): (4275000/7527)
IV size: 8 bytes
replay detection support: Y
From the offsite datacenter
local ident (addr/mask/prot/port): (10.254.60.6/255.255.255.255/47/0)
remote ident (addr/mask/prot/port): (10.254.10.6/255.255.255.255/47/0)
current_peer: 198.40.227.50:500
dynamic allocated peer ip: 0.0.0.0
PERMIT, flags={origin_is_acl,}
#pkts encaps: 22360, #pkts encrypt: 22360, #pkts digest 22360
#pkts decaps: 0, #pkts decrypt: 0, #pkts verify 0
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
#send errors 1156, #recv errors 0
local crypto endpt.: 198.40.254.178, remote crypto endpt.: 198.40.227.50
path mtu 1500, ipsec overhead 56, media mtu 1500
current outbound spi: 5d63434c
inbound esp sas:
spi: 0xd78e63c9(3616433097)
transform: esp-3des esp-sha-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 1, crypto map: cr-lakeavemap
sa timing: remaining key lifetime (k/sec): (4608000/6604)
IV size: 8 bytes
replay detection support: Y
inbound ah sas:
inbound pcp sas:
outbound esp sas:
spi: 0x5d63434c(1566786380)
transform: esp-3des esp-sha-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2, crypto map: cr-lakeavemap
sa timing: remaining key lifetime (k/sec): (4607792/6596)
IV size: 8 bytes
replay detection support: Y
outbound ah sas:
outbound pcp sas:
I'm not sure where the issue lies and have beat my head on this for awhile so any help/insight is greatly appreciated. If there is anything else you'd like to see please let me know.
