8.3 ASA VPN access rules

Hi, I recently bought an ASA 5520 to use as a VPN gateway for several tunnells site to site VPN. I've upgraded to version 8.3, and set up a lab environment. I implemented a simple VPN with a rule of intellectual property general permit to stert with and everything works fine. I'm having trouble tightenign access now, if I change the access on the SAA for ICMP I can ping both directions, if I add tcp I can telnet from a computer at the other end of the VPN, but if I change the tcp protocol to telnet, I can't connect. the other end on the VPN is a cisco 2620XM and I match the lists of access for each of the changes. I also do not understand the meaning of the ASA access list, it seems that if I want to allow the remote tcp host behind the ASA access I have the host behind the ASA as the source, it appears backward? Anyone can shed some light on this? very much appreciated.

Yes, you are supposed to only configure 'IP' to your ACL (ACL applied to your crypto card) crypto and crypto ACL supposed to mirror image on each peer, so when you change to specific TCP/UDP ports, is not mirror image of the other side/peer more.

I thought that you use ACL applied to "vpn-filter".

But in the previous post, actually configure you ACL on each interface.

The above is 3 different ACL you have applied differently (crypto ACL--> apply to the card crypto, vpn ACL--> apply to vpn-filter and your normal ACL interface).

Tags: Cisco Security

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    Protocol-tunnel-VPN IPSec svc webvpn

    attributes global-tunnel-group DefaultRAGroup

    address-pool SSLClientPool-10

    IPSec-attributes tunnel-group DefaultRAGroup

    pre-shared key *.

    NO-SSL-VPN Tunnel-group type remote access

    General-attributes of the NO-SSL-VPN Tunnel-group

    address-pool SSLClientPool-10

    Group Policy - by default-SSLClientPolicy

    NO-SSL-VPN Tunnel - webvpn-attributes group

    enable PAS_VPN group-alias

    allow group-url https://X.X.139.79/PAS_VPN

    !

    class-map inspection_default

    match default-inspection-traffic

    !

    !

    type of policy-card inspect dns preset_dns_map

    parameters

    maximum message length automatic of customer

    message-length maximum 512

    Policy-map global_policy

    class inspection_default

    inspect the preset_dns_map dns

    inspect the ftp

    inspect h323 h225

    inspect the h323 ras

    inspect the rsh

    inspect the rtsp

    inspect esmtp

    inspect sqlnet

    inspect the skinny

    inspect sunrpc

    inspect xdmcp

    inspect the sip

    inspect the netbios

    inspect the tftp

    Review the ip options

    !

    global service-policy global_policy

    privilege level 3 mode exec cmd command perfmon

    privilege level 3 mode exec cmd ping command

    mode privileged exec command cmd level 3

    logging of the privilege level 3 mode exec cmd commands

    privilege level 3 exec command failover mode cmd

    privilege level 3 mode exec command packet cmd - draw

    privilege show import at the level 5 exec mode command

    privilege level 5 see fashion exec running-config command

    order of privilege show level 3 exec mode reload

    privilege level 3 exec mode control fashion show

    privilege see the level 3 exec firewall command mode

    privilege see the level 3 exec mode command ASP.

    processor mode privileged exec command to see the level 3

    privilege command shell see the level 3 exec mode

    privilege show level 3 exec command clock mode

    privilege exec mode level 3 dns-hosts command show

    privilege see the level 3 exec command access-list mode

    logging of orders privilege see the level 3 exec mode

    privilege, level 3 see the exec command mode vlan

    privilege show level 3 exec command ip mode

    privilege, level 3 see fashion exec command ipv6

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    privilege, level 3 see fashion exec command asdm

    exec mode privilege see the level 3 command arp

    command routing privilege see the level 3 exec mode

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    privilege, level 3 see the exec command in aaa-server mode

    AAA mode privileged exec command to see the level 3

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    privilege, level 3 see the vpnclient command exec mode

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    level 3 for the show privilege mode configure the command interface

    level 3 for the show privilege mode set clock command

    level 3 for the show privilege mode configure the access-list command

    level 3 for the show privilege mode set up the registration of the order

    level 3 for the show privilege mode configure ip command

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    clear level 3 privilege mode configure aaa-order server

    context of prompt hostname

    no remote anonymous reporting call

    Hello

    Loss of connectivity to the LAN is not really supposed all remove this command UNLESS your network is using another device as their gateway to the Internet. In this case configuration dynamic PAT or political dynamics PAT (as you) would make sense because the LAN hosts would see your VPN connection from the same directly connected network users and would be know to traffic before the ASA rather than their default gateway.

    So is this just for VPN usage and NOT the gateway on the LAN?

    If it is just the VPN device I'd adding this

    global interface (phones) 10

    He would do the same translation for 'phones' as he does on 'inside' (of course with different PAT IP)

    -Jouni

  • Wacky VPN access problem of ASA

    Hi people,

    I am currenty a situation, and I am in real need of advice...

    The situation is that, if ASA helps my remote branches to access my home network and its allowing people to visit Internet inside, its not allowing the remote VPN client VPN access... R V to aid VPN client version of Cisco 4.6...

    See a presentation of basic network that illustrates our network and configuration of the ASA...

    Advice to solve this problem will be greatly appreciated...

    Kind regards

    Noman Bari

    I see what rou are... Please see my attchement...

    Please rate if it helps!

  • asa himself through site to site vpn access server

    Hello

    I have problem with access to the servers through site to site vpn to ASA that makes this vpn site-to-site and Clientless VPN enablerd.

    Reason why I need it / what I do:

    ASA 5510 enabled Clientless VPN and on this Portal allows users to access internal servers through bookmars URL. We use it when someone wouldn't access IPSec VPN or in an internet café. If this user connects to clientless vpn and click on the bookmark to access for example mail server. But there is problem, asa cannot access this server through VPN site-to-site.

    Network:

    Here's a quick design of my network.

    I don't have server access to the problem in the VLAN 159 of VLAN 10, or 100. But I need to be able to access the server in Vlan 159 of ASA 5510, who owns the IP 192.168.1.4.

    I have this subnet ASA owned by FRONT-NAT object in the same place that VLAN 10 to 100 are and vpn Site-to-Site profile.

    What I makeover or how can I solve it?

    Thank you

    Clientless VPN when accessing internal servers, it will use the closest to the source of the connection interface and if you connect to via clientless SSL VPN ASA5510 and need access ASA5505 LAN via the site to site VPN, the interface closest to the ASA5510 to ASA5505 LAN is ASA5510 outside interface, therefore, the vpn of site-to-site crypto ACL must match on ASA5510 outside the ip address of the interface.

    Here's what you need on each ASA:

    ASA5510:

    permit same-security-traffic intra-interface

    ip 192.168.159.0 external interface allowed access list 255.255.255.0

    ASA5505:

    ip 192.168.159.0 access list allow 255.255.255.0 host

    In addition, also need to add the same ACL for access-list of exemptions on ASA5505 NAT:

    ip 192.168.159.0 access list allow 255.255.255.0 host

    Hope that helps.

  • Device behind a Firewall other, ASA VPN

    I have a client who wants to put their VPN / behind the ASA ASA main connected to the Internet.  Both devices have an inside leg for the internal network, but the ASA VPN connects directly to the Internet ASA.

    Topology:

    Outisde FW: Internet transfer Procedure > ASA/FW > leg DMZ to ASA/VPN

    ASA VPN: Outside the L3 Interface interface DMZ of ASA/FW link

    On the outside NAT FW I would be the external address of the VPN / ASA outside the public IP address is available and I have a rule that allows all IP from outside to outside the private IP VPN.  Inside = 192.168.254.1 outside = public IP address.

    Configured on the VPN / ASA, ASA standard SSL Remote Access.

    When I hit the NAT public IP address, nothing happens.  I've run packet - trace on the FW outside, and everything seems good.

    Someone at - it a sampling plan / config for a similar topology?     Internet > ASA/FW > dmz-leg > ASA/VPN

    Thanks in advance,
    Bob

    Can share you your NAT and routing configuration? Of these two ASAs

  • ASA vpn client

    Hello world

    I would like to ask for help in order to correct a customer vpn tunnel. I'm not familiar with the AAS, so please do not laugh if I write something stupid

    So I inherit one asa, which has two interface used physical and vlan more. Outdoors, office, management and management. I use my computer on the vlan management, and I can reach the computers on the desktop (192.168.12.0/24) and the branch (192.168.10.0/24). I would realize that I connect to thrught houses a vpn, and I should reach the 12.x and 10.x network as I was in these networks (due to the microsoft allowed wirewall to the local network traffic).

    I inherited a vpn configuration which I added my user.

    I'm trying to cite only the relevant portion of config:

    SSH 192.168.99.0 255.255.255.0 management

    access extensive list ip 192.168.99.0 nonat_management allow 255.255.255.0 192.168.99.0 255.255.255.0

    access extensive list ip 192.168.99.0 nat_management_branch allow 255.255.255.0 192.168.10.0 255.255.255.0
    access extensive list ip 192.168.99.0 nat_management_office allow 255.255.255.0 192.168.12.0 255.255.255.0

    IP local pool ippool 192.168.99.100 - 192.168.99.200

    NAT-control
    Global 1 interface (outside)

    NAT (management) - access list 0 nonat_management
    nat_management_office list of access 5 NAT (management)
    nat_management_branch list of Access 10 NAT (management)

    192.168.99.50 management - dhcpd addresses 192.168.99.79
    enable dhcpd management

    L2TP strategy of Group internal
    monty password username * == encrypted nt
    monty username attributes
    Protocol-tunnel-VPN l2tp ipsec
    VPN-framed-ip-address 192.168.99.99 255.255.255.0
    attributes global-tunnel-group DefaultRAGroup
    ippool address pool
    Group Policy - by default-l2tp
    IPSec-attributes tunnel-group DefaultRAGroup
    pre-shared key *.
    tunnel-group DefaultRAGroup ppp-attributes
    ms-chap-v2 authentication

    I quote the encryption settings, because I can connect to asa, I think that I have problems with the nat or access rules.

    I have an ip local pool 192.168.99.100 - 192.168.99.200, but I have the fixed ip with the vpn-framed-ip-address 192.168.99.99 255.255.255.0

    Happened when I connect and try to reach the following computers:

    I can reach only a freenas 192.168.12.2, and I see in his journal that I have connected with 192.168.99.99 (vpn-framed-ip-address)

    I can't reach the computers on networks, however I have two nat rules, working when I'm in the office network 99.0

    access extensive list ip 192.168.99.0 nat_management_branch allow 255.255.255.0 192.168.10.0 255.255.255.0
    access extensive list ip 192.168.99.0 nat_management_office allow 255.255.255.0 192.168.12.0 255.255.255.0

    It seems that these two nat rules do not work with my vpn client.

    And it is very important to arrive at the asa with ssh through the tunnel, but I can't.

    I don't know if that is the ip address of the vpn client is in the management network, perhaps one should change to another network:

    for example 192.168.95.0/24

    A vpn asa for Dummies or any help is appreciated.

    Thank you very much

    Hi Chris,

    The following should help:

    access-list allowed 192.168.12.0 nonat_office 255.255.255.0 192.168.90.0 255.255.255.0

    In this way, returning office subnet pool VPN traffic is exempt from nat. And so you will not get the failure of RPF checking.

    In addition, you must change this:

    nat_vpn_office to access extended list ip 10.10.10.0 allow 255.255.255.0 192.168.12.0 255.255.255.0

    (incoming traffic on the VPN remote access would come from the VPN pool.) Not your home network.)

    You must have:

    No nat_vpn_office access list extended ip 10.10.10.0 allow 255.255.255.0 192.168.12.0 255.255.255.0

    access extensive list ip 192.168.90.0 nat_vpn_office allow 255.255.255.0 192.168.12.0 255.255.255.0

    NAT (outside) 5 nat_vpn_office list of outdoor access

    Hope this helps, and sorry for the delay.

    -Shrikant

    P.S.: Please check the question as answered if it was resolved. Do rates all useful messages. Thank you.

  • ASA VPN

    Hello

    I have a question concerning the VPN, is it possible to configure the two IPsec VPN site-to-site and remote access vpn on the same ASA and working at the same time, does require one or two different public ip addresses?

    I have cisco ASA 5540 - version 9.1

    Best regards

    Hello

    Yes, you can with 1 single public ip address. You need to activate the same-security-traffic allow intra-interface functionality to allow a customer vpn site-to-site vpn access if you need.

    Take a look at the Cisco documentation;

    http://www.Cisco.com/c/en/us/support/docs/security/ASA-5500-x-series-NEX...

    Thank you

    PS: Please do not forget to rate and score as good response if this solves your problem

  • ASA VPN - allow user based on LDAP Group

    Hello friends

    I have create a configuration to allow connection based on LDAP Group.

    I m not specialize in the firewall and I tried to follow the links above, but both seem old, commanded several is not available.

    http://www.tunnelsup.com/Cisco-ASA-VPN-authorize-user-based-on-LDAP-group

    http://www.Cisco.com/c/en/us/support/docs/security/ASA-5500-x-series-NEX...

    Anyone know how I can do?

    Thank you

    Marcio

    I like to use the Protocol DAP (dynamic access policies) to control this.  Follow this guide:

    https://supportforums.Cisco.com/document/7691/ASA-8X-dynamic-access-policies-DAP-deployment-guide

  • Problems to make the access rule for a NAT device work

    I am new to Cisco routers so light easy on me.

    Our company has just purchased a RV042G so that we can start using VPN for some of our sales representatives.  There is always a need to access the RDC to configure our WAN1 port access rule to the internal server.  However, it does not work.

    I have install this type of rule on Sonicwalls before, but I don't have much experience with Cisco.  I'm a bit confused as to why it doesn't work anymore.  Any advice would be great.

    Service = DRC (3389)

    Source port = WAN1

    Source IP = our static IP address

    Destination IP = 192.168.0.250.

    What I am doing wrong?

    Hello Eric,

    Looks like you got the first step made so fare. How access lists works on this devices is actually just control/allow certain traffic but does not in fact of NAT/port forwarding. What you need to do is then go into the setup and go under transfer. Next, you will create your port forwarding it. You click on service management again to set up which port you must sent (it may be already there for when you have configured your access list). Some of them should be similar on how you implemented in the access list, but if you want more information let me know and I can give more details.

    Hope that helps out.

    Thank you
    Clayton Sill

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