CISCO ASA 5505 problem on VPN

Posted on 2008-06-11
Last Modified: 2010-06-13
I have a CISCO ASA 5505 Ver 7.2(2). I have done a VPN with a Cisco3000 VPN Concentrator. The Vpn is up and I can ping all the remote  hosts that I want, but if I ask something else (like a ftp or http connection) the  internal network stop to respond me and i can't see anythings. I see that the VPN remain up and to bring up the internal network i must ping the internal host from the ASA. This firewall does only this work.
Have you any idea why it happens?

Question by:alesorce
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Expert Comment

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My experience with configuring cisco vpn tunnels is that it involves using an access list to identify the traffic to be encrypted and sent across the tunnel.  Is this how you're setup, also?  If so, please post the access list you're using, if not the entire config on the ASA, as you may be limiting the traffic in your access list and causing the problems you're reporting.

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Thi is the access list of the VPN. I think that I've enabled all.

access-list lta_list; 1 elements
access-list lta_list line 1 extended permit ip 192.168.X.X 255.255.X.X 10.X.X.X 255.X.X.X

The connection to the hosts start and I see it, but after the internal network stops to work. The log don't say me nothin about ethernet error or anyelse.


Expert Comment

Comment Utility
Well, that's a little different than I'm used to, but I've only worked with the pix firewall and routers, not the newer ASA.  Are you really using a class A subnet mask on your 10.x.x.x network?  I wouldn't think that should be a problem.  If your two networks are really 192.168.x and 10.x.y, with 254 hosts each, I'd use a class C mask (  In my present job, I'm not configuring cisco vpns, but this also might require using an inverse mask (i.e. ..... permit ip 192.168.x.x 10.x.x.x - can you try using an inverse mask once just to be sure that's not it?

I assume then you have a 'match address lta_list' statement in your crypto map?

Expert Comment

Comment Utility
Could you post your config for review?
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sho runn
: Saved
ASA Version 7.2(2)
hostname ciscoasa
domain-name label
enable password 2KFQnbNIdI.2KYOU encrypted
name Server1.autostrade
name Server2.autostrade
name Server3.autostrade
name Collaudo.label
name Web1.label
name Web2.label
name DBServer.label
interface Vlan1
 nameif inside
 security-level 100
 ip address 192.168.X.X 255.255.X.X
interface Vlan2
 nameif outside
 security-level 0
 ip address 151.X.X.X 255.255.X.X
<--- More --->
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
<--- More --->
passwd 2KFQnbNIdI.2KYOU encrypted
ftp mode passive
clock timezone CEST 1
clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00
dns server-group DefaultDNS
 domain-name label
same-security-traffic permit intra-interface
object-group network Server_autostrade
access-list inside_access_in extended permit ip any
access-list outside_access_in extended permit esp any interface outside
access-list outside_access_in extended permit ah any interface outside
access-list outside_access_in extended permit udp any interface outside eq isakmp
access-list lta_list extended permit ip 192.168.X.X 255.255.X.X 10.X.X.X 255.X.X.X
pager lines 24
logging enable
logging asdm debugging
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
icmp permit any inside
icmp permit any outside
asdm image disk0:/asdm-522.bin
no asdm history enable
<--- More --->C
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list lta_list
nat (inside) 1 192.168.X.X 255.X.X.X
access-group inside_access_in in interface inside
access-group outside_access_in in interface outside
route outside 151.X.X.X 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
group-policy DfltGrpPolicy attributes
 banner none
 wins-server none
 dns-server none
 dhcp-network-scope none
 vpn-access-hours none
 vpn-simultaneous-logins 3
 vpn-idle-timeout 30
 vpn-session-timeout none
 vpn-filter none
 vpn-tunnel-protocol IPSec l2tp-ipsec
 password-storage disable
<--- More --->
 ip-comp disable
 re-xauth disable
 group-lock none
 pfs disable
 ipsec-udp disable
 ipsec-udp-port 10000
 split-tunnel-policy tunnelall
 split-tunnel-network-list none
 default-domain none
 split-dns none
 intercept-dhcp disable
 secure-unit-authentication disable
 user-authentication disable
 user-authentication-idle-timeout 30
 ip-phone-bypass disable
 leap-bypass disable
 nem disable
 backup-servers keep-client-config
 msie-proxy server none
 msie-proxy method no-modify
 msie-proxy except-list none
 msie-proxy local-bypass disable
 nac disable
 nac-sq-period 300
<--- More --->
 nac-reval-period 36000
 nac-default-acl none
 address-pools none
 client-firewall none
 client-access-rule none
  functions url-entry file-access file-entry file-browsing port-forward
  html-content-filter none
  homepage none
  keep-alive-ignore 4
  http-comp gzip
  filter none
  url-list none
  customization value DfltCustomization
  port-forward none
  port-forward-name value Application Access
  sso-server none
  deny-message value Login was successful, but because certain criteria have not been met or due to some specific group policy, you do not have permission to use any of the VPN features. Contact your IT administrator for more information
  svc none
  svc keep-installer installed
  svc keepalive none
  svc rekey time none
  svc rekey method none
  svc dpd-interval client none
<--- More --->
  svc dpd-interval gateway none
  svc compression deflate
username admin password eY/fQXw7Ure8Qrz7 encrypted privilege 15
http server enable
http 192.168.X.X 255.255.X.X inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
sysopt connection tcpmss 1300
crypto ipsec transform-set lta_t esp-3des esp-sha-hmac
crypto ipsec fragmentation after-encryption inside
crypto ipsec fragmentation after-encryption outside
crypto map lta 10 match address lta_list
crypto map lta 10 set peer 193.X.X.X
crypto map lta 10 set transform-set lta_t
crypto map lta 10 set nat-t-disable
crypto map lta 10 set reverse-route
crypto map lta interface outside
crypto isakmp enable inside
crypto isakmp enable outside
crypto isakmp policy 10
 authentication pre-share
 encryption 3des
 hash sha
<--- More --->
 group 2
 lifetime none
tunnel-group 193.X.X.X type ipsec-l2l
tunnel-group 193.X.X.X ipsec-attributes
 pre-shared-key *
 peer-id-validate nocheck
 isakmp keepalive disable
telnet timeout 5
ssh timeout 5
console timeout 0

policy-map type inspect dns preset_dns_map
  message-length maximum 512
ntp server Collaudo.label source inside prefer
prompt hostname context
no compression svc http-comp
: end

That's all.
Have you any idea?

Expert Comment

Comment Utility
Try using the following command to allow VPN traffic to bypass the ACL's.

sysopt connection permit-ipsec

Expert Comment

Comment Utility
ah....didn't remember that - raptor is absolutely correct there - definitely need that command. (wish I had one of my old configs in hand to compare to :)

Expert Comment

Comment Utility
Any luck?

Accepted Solution

alesorce earned 0 total points
Comment Utility
I've change the appliance.

Thank's to all

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