Problem with "vpn sysopt connection permit.

Hi all

I would like to ask you for advice with "vpn sysopt connection permit". I have a problem with by-pass-access list (acl) in the INSIDE interface. As I understand it and I'm going to use this command, there is no need to especialy allow traffic in the access list for the INSIDE and I can control the filter-vpn traffic. But in my case it's quite the opposite, I want particularly to this INTERIOR acl traffi. When I allow this traffic inside acl L2L tunnel rises, hollow traffic flow vpn-fltr ane acl that everything is OK. But when I do not allow that this traffic is inside of the rule with Deny statement in acl INSIDE block traffic and tunnel goes ever upward. Part of the configuraciton which you can view below.

Please let me know if I'm wrong, or what I did wrong?

Thank you

Karel

PHA-FW01 # view worm | Worm Inc

Cisco Adaptive Security Appliance Software Version 4,0000 1

PHA-FW01 # display ru all sys

No timewait sysopt connection

Sysopt connection tcpmss 1380

Sysopt connection tcpmss minimum 0

Sysopt connection permit VPN

Sysopt connection VPN-reclassify

No sysopt preserve-vpn-stream connection

no RADIUS secret ignore sysopt

No inside sysopt noproxyarp

No EXT-VLAN20 sysopt noproxyarp

No EXT-WIFI-VLAN30 sysopt noproxyarp

No OUTSIDE sysopt noproxyarp

PHA-FW01 # display the id of the object-group ALGOTECH

object-group network ALGOTECH

object-network 10.10.22.0 255.255.255.0

host of the object-Network 172.16.15.11

PHA-FW01 # show running-config id of the object VLAN20

network of the VLAN20 object

subnet 10.1.2.0 255.255.255.0

L2L_to_ALGOTECH list extended access permitted ip object object-group VLAN20 ALGOTECH

extended access list ACL-ALGOTECH allow ip object-group object VLAN20 ALGOTECH

Note EXT-VLAN20 of access list =.

access list EXT-VLAN20 allowed extended ip object VLAN20 ALGOTECH #why object-group must be the rule here?

access list EXT-VLAN20 extended permitted udp object VLAN20 object-group OUT-DNS-SERVERS eq field

EXT-VLAN20 allowed extended VLAN20 object VPN-USERS ip access list

EXT-VLAN20 extended access list permit ip object VLAN20 OPENVPN-SASPO object-group

EXT-VLAN20 allowed extended object VLAN10 VLAN20 ip access list

deny access list extended VLAN20 EXT ip no matter what LOCAL NETS of object-group paper

EXT-VLAN20 allowed extended icmp access list no echo

access list EXT-VLAN20 allowed extended object-group SERVICE VLAN20 object VLAN20 everything

EXT-VLAN20 extended access list deny ip any any newspaper

extended access list ACL-ALGOTECH allow ip object-group object VLAN20 ALGOTECH

GROUP_POLICY-91 group policy. X 41. X.12 internal

GROUP_POLICY-91 group policy. X 41. X.12 attributes

value of VPN-filter ACL-ALGOTECH

Ikev1 VPN-tunnel-Protocol

tunnel-group 91.X41. X.12 type ipsec-l2l

tunnel-group 91.X41. X.12 General attributes

Group Policy - by default-GROUP_POLICY-91. X 41. X.12

tunnel-group 91.X41. X.12 ipsec-attributes

IKEv1 pre-shared-key *.

PHA-FW01 # show running-config nat

NAT (EXT-VLAN20, outdoors) static source VLAN20 VLAN20 static destination ALGOTECH ALGOTECH non-proxy-arp-search to itinerary

network of the VLAN20 object

dynamic NAT interface (EXT-VLAN20, outdoors)

group-access to the INTERIOR in the interface inside

Access-group interface VLAN20 EXT EXT-VLAN20

Hello

The command "sysopt connection permit-vpn" is the default setting and it applies only to bypass ACL interface to the interface that ends the VPN. It would be connected to the external network interface. This custom has no effect on the other interfaces ACL interface.

So if you initiate or need to open connections from your local network to remote network through the VPN L2L connection then you will need to allow this traffic on your LAN interface ACL networks.

If the situation was that only the remote end has launched connections to your network then 'sysopt permit vpn connection' would allow their connections around the external interfaces ACL. If If you have a VPN configured ACL filter, I think that the traffic will always accompany against this ACL.

Here are the ASA reference section to order custom "sysopt"

http://www.Cisco.com/en/us/docs/security/ASA/command-reference/S21.html#wp1567918

-Jouni

Tags: Cisco Security

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    I suspect that the problem is to do with NAT / PAT - if only a customer wants to create a VPN session to the 3015, NAT is used, but if several clients go through your Linksys router, then you are using PAT, that requires NAT t (nat transparency), see the following URL for more information:- http://support.microsoft.com/default.aspx?scid=kb;en-us;818043

    Rowan

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