Cisco ASA interface issues with VPN : Cisco, ASA, 5505, VPN

May 16, 2008 11:21pm pdt

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05.07.2008 at 12:52PM PDT, ID: 23384066 | Points: 500

	[x] Attachment Details

Cisco ASA interface issues with VPN

Zones: Cisco PIX Firewall, Virtual Private Networking (VPN), IPSec Security Protocol

Tags: Cisco, ASA, 5505, VPN

Cisco ASA interface issues with VPN

I have the attached config. With this config:
I can ping the outside interface from the internet.
I can telnet and ssh to it.
I cannot RDP through it to machines on the internal network.
The site to site VPN tunnel comes up.
I cannot ping or rdp to devices on the internal network from the other side of the tunnel.
I can remote VPN into it with the Cisco client.

When I change the following:
remove:
access-group outbound_icmp in interface outside
add:
access-group allowed_in in interface outside
I can ping the outside interface.
I can not RDP through it.
The site to site VPN tunnel comes up.
I CAN ping or rdp to devices on the internal network from the other side of the tunnel.
I can remote VPN into it with the Cisco client.

When I then change the following:
Change ACL from:
access-list outside_cryptomap_dyn extended permit ip any 10.50.45.0 255.255.255.0
to:
access-list outside_cryptomap_dyn extended permit ip any any
access-list outside_cryptomap_dyn extended permit icmp any any
access-list outside_cryptomap_dyn extended permit ip any 10.50.45.0 255.255.255.0

I CANNOT ping the outside interface.
I can not RDP through it.
The site to site VPN tunnel comes up.
I can ping or rdp to devices on the internal network from the other side of the tunnel.
I CANNOT remote VPN into it with the Cisco client.

I do not understand the problems here. It's like I am so very close but I can't do everything I need to do.
When I added the two "permit ip any any and permit icmp any any" statements
(I realize that this is leaving it too open but I am just doing that for debugging)
I expected it to open up and let basically everything flow. But it doesn't.

What I need to happen is:
Be able to ping the outside interface from the internet.
Telnet and ssh to it.
RDP through it to machines on the internal network.
The Site to site VPN tunnel be up.
Ping or rdp to devices on the internal network from the other side of the tunnel.
Remote VPN into it with the Cisco client.
RDP, http, icmp, smtp, etc from the internal network out.

Hopefully someone can explain this to me and show me what I am doing wrong.
Thanks for your help!

         
           
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             ASA Version 8.0(3)
!
hostname this2thatASA
domain-name this.com
enable password xxx encrypted
names
name 172.x.8.0 this_172
name 192.x.5.0 this_192
dns-guard
!
interface Vlan1
 nameif inside
 security-level 100
 ip address 10.5.4.1 255.255.255.0
!
interface Vlan2
 nameif outside
 security-level 0
 ip address 1.2.1.1 255.255.255.224
!
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
!
passwd xxx encrypted
boot system disk0:/asa803-k8.bin
boot config disk0:/startup-config
ftp mode passive
clock timezone CDT -5
clock summer-time CDT recurring
dns domain-lookup inside
dns domain-lookup outside
dns server-group DefaultDNS
 name-server 192.x.5.253
 name-server 172.x.8.252
 domain-name this.com
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object-group network DM_INLINE_NETWORK_1
 network-object this_172 255.255.248.0
 network-object this_192 255.255.255.0
object-group network DM_INLINE_NETWORK_2
 network-object this_172 255.255.248.0
 network-object this_192 255.255.255.0
object-group icmp-type ICMP_allowed
 description ping group
 icmp-object echo
 icmp-object echo-reply
 icmp-object unreachable
 icmp-object source-quench
 icmp-object time-exceeded
access-list outside_cryptomap extended permit ip any 10.5.4.0 255.255.255.0
access-list outside_cryptomap extended permit ip 10.5.4.0 255.255.255.0 object-group DM_INLINE_NETWORK_1
access-list inside_outbound_nat0 extended permit ip any 10.5.4.0 255.255.255.0
access-list inside_outbound_nat0 extended permit ip 10.5.4.0 255.255.255.0 object-group DM_INLINE_NETWORK_2
access-list outside_cryptomap_dyn extended permit ip any 10.5.4.0 255.255.255.0
access-list RemoteAccessVPNusersACL standard permit any
access-list outbound_icmp extended permit icmp any any object-group ICMP_allowed
access-list allow_icmp extended permit icmp any any
access-list allowed_in extended permit ip any any
access-list allowed_in extended permit icmp any any
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool remote_vpn_pool 10.5.4.245-10.5.4.254 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
icmp permit any inside
icmp permit any outside
asdm image disk0:/asdm-603.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0
nat (inside) 1 0.0.0.0 0.0.0.0
access-group outbound_icmp in interface outside
route outside 0.0.0.0 0.0.0.0 1.2.1.2 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
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 0.0.0.0 0.0.0.0 outside
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto dynamic-map outside_dyn_map 20 match address outside_cryptomap_dyn
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto map outside_map0 1 match address outside_cryptomap
crypto map outside_map0 1 set peer 65.43.207.158
crypto map outside_map0 1 set transform-set ESP-3DES-MD5
crypto map outside_map0 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map0 interface outside
crypto isakmp enable outside
crypto isakmp policy 20
 authentication pre-share
 encryption 3des
 hash md5
 group 2
 lifetime 86400
crypto isakmp nat-traversal 30
telnet 0.0.0.0 0.0.0.0 inside
telnet 0.0.0.0 0.0.0.0 outside
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 inside
ssh 0.0.0.0 0.0.0.0 outside
ssh timeout 60
console timeout 0
dhcpd dns 192.x.5.253 172.x.8.252
!
dhcpd address 10.5.4.225-10.5.4.244 inside
dhcpd enable inside
!
 
threat-detection basic-threat
threat-detection statistics access-list
ntp server 64.90.182.55 source outside
group-policy RemoteAccessVPNusers internal
group-policy RemoteAccessVPNusers attributes
 wins-server none
 dns-server value 192.x.5.253 172.x.8.252
 vpn-tunnel-protocol IPSec
 split-tunnel-policy tunnelspecified
 split-tunnel-network-list value RemoteAccessVPNusersACL
 default-domain value this.com
 user-authentication disable
group-policy SiteToSiteVPNusers internal
group-policy SiteToSiteVPNusers attributes
 wins-server none
 dns-server value 192.x.5.253 172.x.8.252
 vpn-tunnel-protocol IPSec
 default-domain value this.com
username administrator password xxx encrypted privilege 15
username thatVPNremote password xxx encrypted
tunnel-group 65.43.207.158 type ipsec-l2l
tunnel-group 65.43.207.158 general-attributes
 default-group-policy SiteToSiteVPNusers
tunnel-group 65.43.207.158 ipsec-attributes
 pre-shared-key *
tunnel-group RemoteAccessVPN type remote-access
tunnel-group RemoteAccessVPN general-attributes
 address-pool remote_vpn_pool
 default-group-policy RemoteAccessVPNusers
tunnel-group RemoteAccessVPN 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 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 icmp
  inspect http
!
service-policy global_policy global
prompt hostname context
: end

           
         

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Question Stats

Zone: Networking

Question Asked By: cyberdragon666

Question Asked On: 05.07.2008

Participating Experts: 1

Points: 500

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05.07.2008 at 02:50PM PDT, ID: 21520644

GHigbee:

I have a similar situation in that I have a site-to-site VPN tunnel and also have remote users using the Cisco client to access our network. After looking at your config and comparing it to mine I have the following recommendations/noticed differences:

1. My access-list that is used for the match address line in the crypto map for the site-to-site specifies the local internal network and the destination remote network instead of using the "any" keyword. Example:

access-list outside_cryptomap extended permit ip any 10.5.4.0 255.255.255.0
would be
access-list outside_cryptomap extended permit ip 10.5.4.0 255.255.255.0 <remote network and netmask>

You would add the reverse of this on the remote network side.

2. For the dynamic crypto map I don't use a match address line at all.

3. For the RDP through the firewall (without VPN) I would add static NAT entries for the destination machines and then add specifc access-list entries to the access-list that is applied to the outside interface for the RDP ports and a destination of the external NAT address of the device.

Let me know if you need more information.

20080236-EE-VQP-29 / EE_QW_2_20070628