VPN-filer configuration on the VPN traffic

Hello world

We set up a site to ipsec with the seller.

For security reasons we do not want to allow all traffic through the tunnel.

ASA has 2 interfaces both inside and outside.

We refuse any one on the external interface ip.

I have config vpn run ACL to allow traffic on port ssh, icmp through the tunnel.

Then I applied it under the group policy.

name of VPN-filter value.

Need to confirm that I must also allow ipec protocols as esp etc under VPN filter ACL?

Concerning

MAhesh

The vpn-filter is applied to the traffic flowing through the tunnel. You don't need to allow all traffic that 'built' like IKE and IPsec VPN.

On the SAA, you must also add this traffic to your external ACL is it necessary on IOS routers.

For the vpn-filter, be aware that the syntax is not

permit/deny PROTOCOL SOURCE DESTINATION
It's
permit/deny PROTOCOL REMOTE LOCAL
This is relevant when you want to filter traffic from your network to the network of peers.

Tags: Cisco Security

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    The default gateway has been configured online internet, some static while insured roads as traffic to the sites of the company was sent through the other line.

    A few days ago we changed the configuration of ASA to use only a single dsl connection, then the line serving the internet has been cut, while the other will become the gateway default and static routes have been removed.

    The VPN connections instant stopped working and trying to send packets to the remote lan, it seems that ASA will not recognize that the traffic is encrypted. Obviousely we checked cryptomap, acl, ecc, but we find no problem... do you have any suggestions?

    Thanks in advance,

    Matt

    -----------------------------------------------------------------------------------------------------------------------------------------------------------------

    XNetwork object network
    10.10.0.0 subnet 255.255.255.0

    network of the YNetwork object
    172.0.1.0 subnet 255.255.255.0

    card crypto RB1ITSHDSL001_map2 1 corresponds to the address RB1ITSHDSL001_1_cryptomap
    card crypto RB1ITSHDSL001_map2 1 set peer a.b.c.186
    RB1ITSHDSL001_map2 1 transform-set ESP-3DES-SHA crypto card game

    RB1ITSHDSL001_1_cryptomap list extended access permitted ip XNetwork object YNetwork

    -------------------------------------------------------------------------------------------------------------------------------------------------------------------

    Hello

    Your exit the ASA must be encrypting the traffic between XNetwork and YNetwork.

    If the ASA does not encrypt this traffic, it could be because there is a problem with the NAT configuration.

    When the ASA receives a packet, it must first check if there are ACLs that allows traffic, passes through the inspection engine and check that the associated NAT. For example, if the package is coordinated, then the private IP encryption will never take place.

    Could ensure you that packets from the XNetwork are really reach the ASA, the NAT rule is correct and you may be looking for "debugging cry isa 127" and "scream ips 127" debug to check for errors of incompatibility.

    In addition, what is the condition of the tunnel trying to communicate: "sh cry isa his"

    Federico.

  • Does site to Site VPN traffic.

    Hello

    I had a problem with my connection to my supplier, and we can't figure it out for the life of us. We have the tunnel upward, we simply cannot ping either side of it. (as you can tell from the moment where the position, I am at a loss).

    The goal is for our site to pass all traffic via the seller, so they can go out route to the internet for the rest of their network.

    As I said, the tunnel is just, does not seem to be passsing no matter what traffic, or at least real traffic, I think the keep alives pass.

    Hello

    Some comments on configurations

    Your configurations of sites on a quick glance seems fine. You have configured NAT0 for all traffic and you have set up all the traffic on the local network to connect VPN L2L.

    The seller site configurations seems a little weird. Lets start with the routing. It has a route for network 10.0.0.0/8 and 10.4.0.0/16 pointing to the IP address 10.4.250.49 behind the interface 'inner' that CANNOT be the right gateway IP address as the IP 'internal' interfaces is 10.4.253.66/30, so the roads to my knowledge are useless. (IP address of the next hop must be from a directly connected network)

    These are the roads

    Route inside 10.0.0.0 255.0.0.0 10.4.250.49 1

    Route inside 10.4.0.0 255.255.0.0 10.4.250.49 1

    It's the 'inside' interface

    interface GigabitEthernet0/1

    No tap

    Speed 1000

    full duplex

    nameif inside

    security-level 100

    IP 10.4.253.66 255.255.255.252

    So with the configuration above it needs impossible even for traffic to the front between the local networks of the two sites.

    If your goal is also to have passed your site outside of the site and outside traffic to the Internet through the ASA of the seller then its lack of certain configurations.

    You should be at least

    Global 1 interface (outside)

    Since there are only "nat" statement currently sets the addresses of source for translations, but there is no "global" setting the actual address of the NAT/PAT.

    The ASA of the Site of the seller is also the command lack

    permit same-security-traffic intra-interface

    That would allow the traffic coming through the "outside" interface (from your site through the VPN) and go through the 'outside' (your topic traffic to Internet)

    -Jouni

  • VPN needs access to all external internal vpn traffic traffic all in tunnel

    Hello

    Could someone help me find the problem?

    I am ASA configuration as firewall + vpn server, essentially outside of the device's access T1 (there are two VLANS in inside via an iptables, outside of iptables is on the same vlan as insdie of ASA (192.168.5.1 and 192.168.5.2).)  VPN users are authenticated via authentication 2 factors (SDI, ip is 192.168.5.5) and get the ACL by local database.  pool of VPN is 192.168.6.1 - 192.168.6.15. pool of VPN is coordinated to the external IP address

    trying to access a remote host A from the host a is open for the IP and one specific Protocol. all vpn traffic are in the tunnel. the VPN user can connected and ACL vpnuser1_ONLY not working does not as expected.

    Here is the part of configuration:

    ASA Version 8.2 (2)
    ...........

    Route outside 0.0.0.0 0.0.0.0 xx.10.194.193 1

    Route inside companynet1 255.255.255.0 192.168.5.2 1

    Route inside companynet2 255.255.255.0 192.168.5.2 1

    Route inside companynet3 255.255.255.0 192.168.5.2 1

    Route inside companynet4 255.255.255.0 192.168.5.2 1

    ...............

    Route inside companynetn 255.255.255.0 192.168.5.2 1


    NAT (inside) 4 vpnpool 255.255.255.0 outside   <--------- is="" this="">

    Global (outside) 4 xx.10.194.238 netmask 255.255.255.255

    Split-tunnel-policy tunnelall

    .....................

    vpnuser1_ONLY list extended access permitted tcp vpnpool 255.255.255.0 192.168.1.28 host 255.255.255.255 eq ssh connect

    vpnuser1_ONLY list extended access permitted tcp vpnpool 255.255.255.0 74.2.23.195 host 255.255.255.255 eq ssh connect

    ............

    enable SVC

    tunnel-group-list activate

    attributes of Group Policy DfltGrpPolicy

    VPN - connections 8

    VPN-idle-timeout 10

    VPN-session-timeout 60

    Protocol-tunnel-VPN l2tp ipsec

    WebVPN

    SVC Dungeon - install any

    time to generate a new key of SVC 8

    SVC generate a new method ssl key

    SVC request no svc default

    internal GroupPolicy1 group strategy

    attributes of Group Policy GroupPolicy1

    VPN - connections 1

    VPN-idle-timeout 9

    VPN-session-timeout 45

    VPN-tunnel-Protocol svc

    Split-tunnel-policy tunnelall

    WebVPN

    SVC Dungeon - install any

    time to generate a new key of SVC 15

    SVC generate a new method ssl key

    client of dpd-interval SVC 30

    dpd-interval SVC 30 bridge

    value of deny message connection succeeded, but because some criteria have not been met, or because of a specific group policy, you are not allowed to use the VPN features. For more information, contact your COMPUTER administrator.

    disable the SVC routing-filtering-ignore

    username vpnuser1 encrypted password xxxxxxx

    username vpnuser1 attributes

    VPN-group-policy GroupPolicy1

    VPN-idle-timeout 6

    VPN-session-timeout 20

    VPN-filter value vpnuser1_ONLY

    VPN-tunnel-Protocol svc

    value of group-lock COMAVPN

    type of remote access service

    tunnel-group DefaultRAGroup webvpn-attributes

    Disable group companyvpn aliases

    type tunnel-group COMAVPN remote access

    attributes global-tunnel-group COMAVPN

    address (inside) vpnpool pool

    address vpnpool pool

    SDI Group-authentication server

    authentication-server-group (inside) SDI

    LOCAL authority-server-group

    Group Policy - by default-GroupPolicy1

    tunnel-group COMAVPN webvpn-attributes

    activation of the Group companyremote alias

    I did anything wrong / missing?

    Thank you

    Yijun


    First of all, you can set "no nat-control" because once you have relieved of NAT, 'no nat-control' becomes disable anyway. 'No nat-control' is useful if you have no statement of NAT at all on the interface.

    Second, if you can't access the outside inside which is because you must configure the NAT exemption. Not sure if you have configured it.

    Here's the command:

    access-list allowed sheep ip 192.168.1.0 255.255.255.0 192.168.6.0 255.255.255.0

    NAT (inside) 0 access-list sheep

    You can then add all other subnets that are internal to the ACL sheep if you need VPN access.

    Finally, for the error message deny on access-group "OUTSIDE", you would need check if you have configured "sysopt connection VPN-enabled'. If it is disabled, it will also check the "OUTSIDE" interface for VPN traffic.

  • VPN traffic via a secondary access provider

    Hello world

    I have been asked by a client to implement this topology:

    where:

    ISP 1 is used as primary internet connection.

    2 ISP will be used to connect remote users by IPsec VPN.

    Currently, I'm not looking for the Active/Backup feature, I need to know if I can use both ISP connections (as I've written before) an ISP for the Internet company and the other for the user remote access VPN.

    I read some post where, said, it's possible, but I want to be sure.

    Kind regards

    Jose

    ASA must add the static route in the routing table automatically when the VPN client is connected. So, in general, you don't need to do anything. But if not, you can just manually configure who will forward a VPN client IP packet to ISP2.

    With respect to NAT, in general, VPN traffic must ignore the NAT. You can use "nat (inside_interface_name) 0-list of access ' with an ACL that define the vpn traffic to do so.

  • 7.2 ASA5520 - filters VPN traffic

    Hi all,

    I would like to know how can I filter out VPN traffic with a list of access, by using the source address and port of destination as filters.

    I tried with "no sysopt permit vpn connection" but it is to filter the traffic through the VPN tunnel and I want to filter the host which can establish the VPN tunnel.

    I did it in a router with this access list:

    Note access-list 101 VPN

    access-list 101 permit ahp host x.x.x.x everything

    access-list 101 permit esp host x.x.x.x any newspaper

    access-list 101 permit host x.x.x.x esp all

    access-list 101 permit udp host x.x.x.x any eq isakmp

    access-list 101 permit udp host x.x.x.x any eq non500-isakmp

    But I tried the same thing in the ASA and does not work, I think it's because the ASA does not apply the access list for VPN traffic.

    Sincerely, Fernando.

    Fernando

    You can disable it with "no crypto isakmp are outside", but then even if you apply an acl to the outside which allows all IP, ESP, AH it still does not allow an IPSEC connection.

    So for the moment I see no way to do this without using an acl on your router upstream.

    I'll do a reading just in case I missed something.

    Jon

  • VPN traffic through incoming port

    On my ASA 5510 I want for the VPN clients can connect on the outer harbour and have their internet traffic directed back on that same port, with the internal traffic inside port.  Is this possible?  If so, how does do this?

    Will be transmitted traffic VPN based on the routing table after out of the tunnel.

    If you do not want to let Internet traffic to turn on the external interface, you must add

    -permit same-security-traffic intra-interface

    -make the Association NAT change such as

    Global interface 4 (external)

    NAT (outside) 4

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