Default gateway of ASA 5520 8.4 (3) tunnel and different subnets
Hello
I fight on a problem for more than 2 weeks despite various searches.
We have a Cisco router, then a 8.4 (3) ASA 5520.
The ASA's private interface is connected to a switch and now connected to an interface of the router.
The private interface is as follows: 129.88.63.253 255.255.248.0 (/ 21) =>
It's in the 129.88.56.0/21 subnet
Here is the part of the router configuration, that we are interested in:
!
interface Vlan32
address IP 129.88.63.254 255.255.248.0 (it's the tunnel default gateway configured on the SAA - 129.88.56.0/21 subnet)
IP 129.88.71.254 255.255.255.0 secondary
IP 129.88.75.254 255.255.252.0 secondary
IP access-group CVPN-since - 129.88.56 in
IP access-group CVPN-to - out 129.88.56
Check IP unicast accessible source - via rx allow - by default
no ip redirection
MLS-rp ip
!
On the SAA, there is a default route for traffic in tunnel mode:
private road 0.0.0.0 0.0.0.0 129.88.63.254 in tunnel
As you can see, it is on the same subnet as the main Vlan32 of interface IP address on the router.
The scenario is as follows:
-We can connect to the VPN with the appropriate alias (LDAP connection), then we get an IP address in the range (this is a local pool ASA)
-the pool is: 129.88.71.0/24
- but, once we are connected, we cannot do anything, because it looks like we have no access to the network
My thoughts:
For the moment, we give (for the alias/connection profile above based on the LDAP authentication)
an IP address from a local pool of ASA (129.88.71.1 to 129.88.71.253). But this IP address is not on the same subnet as the
tunnel default gateway (129.88.63.254).
For example, if we give an IP address in the subnet 129.88.56.0/21 everything works perfectly.
However, this IP address is still on the same subnet as one of the secondary IP address of the Vlan32 interface on the router:
IP 129.88.71.254 255.255.255.0 secondary
The strange problem is that this configuration has worked for a few days until we reboot the ASA, and now it's over.
Currently, the configuration on the SAA is the same before the reboot.
You have any ideas to make this type of configuration really works (multiple subnets but default gateway a single tunnel, which is the only way)
'access' resources on the network)?
Given the following...
-We can only set one and only one tunnel gateway
-We are unable to extend the 129.88.63.254 ' 255.255.248.0 "subnet
-the problem is not the ACL (tested with and without and they are OK, they let the traffic of the pools above)
Thank you!
Here's an idea. If the secondary IP address is configured on the router just to be on the same subnet as the clients, it is not necessary. It is best to simply set a route in the score of the router
129.88.71.0/24 to the private firewall interface (route ip 129.88.71.0 255.255.255.0 129.88.63.253). It's basically the difference between data is sent right to the firewall (good) versus the firewall with proxy-arp answer an arp broadcast (not as good).
May or may not solve the problem, but it's a cleaner configuration.
Tags: Cisco Security
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the address value ippool pools
username password asa1 VRTlLlJ48/PoDKjS encrypted privilege 15
tunnel-group 200.30.30.1 type ipsec-l2l
IPSec-attributes tunnel-group 200.30.30.1
pre-shared-key *.
type tunnel-group vpngroup1 remote access
tunnel-group vpngroup1 General-attributes
ippool address pool
Group Policy - by default-vpngroup1
vpngroup1 group of tunnel ipsec-attributes
pre-shared-key *.
context of prompt hostname
Cryptochecksum:00000000000000000000000000000000
: end
ASA2 (config) #sh run
Crypto ipsec transform-set ESP-3DES-MD5-esp-3des esp-md5-hmac
86400 seconds, duration of life crypto ipsec security association
Crypto ipsec kilobytes of life security-association 400000
card crypto VPNL2L 1 match for sheep
card crypto VPNL2L 1 set peer 200.30.30.1
VPNL2L 1 transform-set ESP-3DES-MD5 crypto card game
VPNL2L interface card crypto outside
crypto isakmp identity address
crypto ISAKMP allow outside
crypto ISAKMP policy 20
preshared authentication
3des encryption
md5 hash
Group 2
life 86400tunnel-group 200.30.30.1 type ipsec-l2l
IPSec-attributes tunnel-group 200.30.30.1
pre-shared key ciscomy topology:
I try with the following links, but did not work
http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a0080912cfd.shtml
http://www.Cisco.com/en/us/products/ps6120/products_tech_note09186a00807e0aca.shtml
Best regards...
"" I thing both the force of the SAA with the new road outside, why is that? ".
without the road ASA pushes traffic inward, by default.
In any case, this must have been a learning experience.
Hopefully, this has been no help.
Please rate, all the helful post.
Thank you
Rizwan Muhammed.
-
Hi I have a Cisco Asa 5520 and I want to vpn site-to-site by using another interface with a carrier of lan to lan, the problem is when I try to pass traffic have the syslog error to follow:
No translation not found for udp src lan2lan:10.5.50.63/44437 dst colo: biggiesmalls groups / 897LAN to LAN service interface is called: lan2lan
one of the internal interfaces is called: colo
I think that is problem with Nat on the SAA but I need help with this.Config:!
interface GigabitEthernet0/0
nameif outside
security-level 0
eve of fw - ext 255.255.255.0 address IP XXaaaNNaa
OSPF cost 10
OSPF network point-to-point non-broadcast
!
interface GigabitEthernet0/1
No nameif
no level of security
no ip address
!
interface GigabitEthernet0/1.50
VLAN 50
nameif lb
security-level 20
IP 10.1.50.11 255.255.255.0
OSPF cost 10
!
interface GigabitEthernet0/1,501
VLAN 501
nameif colo
security-level 90
eve of fw - int 255.255.255.0 172.16.2.253 IP address
OSPF cost 10
!
!
interface GigabitEthernet1/1
Door-Lan2Lan description
nameif lan2lan
security-level 0
IP 10.100.50.1 255.255.255.248
!
access extensive list ip 10.1.0.0 lan2lan_cryptomap_51 allow 255.255.0.0 object-group elo
permit access list extended ip sfnet 255.255.255.0 lan2lan_cryptomap_51 object-group elo
pager lines 24
Enable logging
host colo biggiesmalls record
No message logging 313001
External MTU 1500
MTU 1500 lb
MTU 1500 Colo
lan2lan MTU 1500
ICMP unreachable rate-limit 1 burst-size 1
ARP timeout 14400
NAT-control
Global 1 interface (external)
interface of global (lb) 1
Global (colo) 1 interface
NAT (lb) 1 10.1.50.0 255.255.255.0
NAT (colo) - access list 0 colo_nat0_outbound
NAT (colo) 1 10.1.13.0 255.255.255.0
NAT (colo) 1 10.1.16.0 255.255.255.0
NAT (colo) 1 0.0.0.0 0.0.0.0
external_access_in access to the external interface group
Access-group lb_access_in in lb interface
Access-group colo_access_in in interface colo
Access-group management_access_in in management of the interface
Access-group interface lan2lan lan2lan
!
Service resetoutside
card crypto match 51 lan2lan_map address lan2lan_cryptomap_51
lan2lan_map 51 crypto map set peer 10.100.50.2
card crypto lan2lan_map 51 game of transformation-ESP-3DES-SHA
crypto lan2lan_map 51 set reverse-road map
lan2lan_map interface lan2lan crypto card
quit smoking
ISAKMP crypto identity hostname
ISAKMP crypto enable lan2lan
crypto ISAKMP policy 10
preshared authentication
3des encryption
sha hash
Group 2
life 86400
Crypto isakmp nat-traversal 20
enable client-implementation to date
IPSec-attributes tunnel-group DefaultL2LGroup
pre-shared-key xxXnnAA
tunnel-group 10.100.50.2 type ipsec-l2l
tunnel-group 10.100.50.2 General-attributes
Group Policy - by default-site2site
No vpn-addr-assign aaa
No dhcp vpn-addr-assign
Telnet timeout 5
!The VPN is OK? ("' isakmp crypto to show his" should show a MM_Active tunnel to the peer address ")
Normally exempt us VPN site-to-site of NAT traffic. This could be your problem. If you can share your configuration, we can have a look.
p.s. you should affect the question of the security / VPN forum.
-
Upgrade to Cisco ASA 5520 8.2.5 to 9.1.7
Hello
I have an upgrade tonight for a customer to upgrade a StandAlone ASA 5520 in version 8.2.5 in 9.1.7. I have the same upgrade week next to the same client for a failover pair.
I already have this kind of process of 8.2.x upgrade to 9.1.x so I know the entire process, since I have to take a first step 8.2.5 8.4.6 then 9.1.7. In addition this customer has no statement of Nat therefore normally an easy process.
But today during my routine to prepare for the upgrade (I prefer to make a double or triple check before) I found this bug:
https://BST.cloudapps.Cisco.com/bugsearch/bug/CSCuh19234;JSESSIONID=0A69...
This bug is fixed in version 8.4.7, and 8.4.6.99. But it is not recommended by the upgrade process for a 8.2.5 to 8.4.7 jump and I can not find the 8.4.6.99 version.
I don't want to have any problems during my upgrade with something I can avoid.
As I said I already have this updated in the past without any problem and with a more complex configuration.
Has anyone as a return to this process for the last months? Should I do an extra step? (before first 8.2.5 to 8.4.5 8.4.6 or 8.4.7)
Thank you in advance for your answer.
There are a few incidents reported for ASA 5520 8.2.5 hit this defect running.
You can go for an extra for 8.4.x upgrade as you mentioned to avoid default we can't say for sure if you will encounter this situation or not. 8.4.6.99 can be a picture of development so be unavailable unless you want to call TAC and confirm or obtain any other image in 8.4.x train.
Maybe add another upgrade code can't hurt as that hit the bug.Kind regards
Dinesh MoudgilPS Please rate helpful messages.
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