Cisco Firewall :: L2TP IPsec Doesn't Work On ASA 5510
Dec 21, 2010
I'm trying to setup a L2TP VPN Connection on my ASA 5510 to connect with Android/Windows (Native Clients).I'm using the newest Releases:Cisco Adaptive Security Appliance Software Version 8.3(2) Device Manager Version 6.3(5)
My asa config just the interesting part:
crypto ipsec transform-set trans esp-3des esp-sha-hmac crypto ipsec transform-set trans mode transportcrypto ipsec security-association lifetime seconds 28800crypto ipsec security-association lifetime kilobytes 4608000crypto dynamic-map dyno 10 set transform-set transcrypto map vpn 20 ipsec-isakmp dynamic dynocrypto map vpn interface outsidecrypto isakmp enable outsidecrypto isakmp policy 10 authentication pre-share encryption 3des hash sha group 2 lifetime 86400no crypto isakmp nat-traversal
[code]....
If i try to connect with a Windows 7 Client (NOT behind NAT) I get the Error 691.
I see that Phase 1/2 are working with debug:
Dec 22 16:32:16 [IKEv1]: Group = DefaultRAGroup, IP = XXXXXX, PHASE 1 COMPLETED
Dec 22 16:51:25 [IKEv1]: Group = DefaultRAGroup, IP = XXXXXX, PHASE 2 COMPLETED (msgid=00000001)
Then I see this "Error":
Dec 22 16:51:26 [IKEv1]: Group = DefaultRAGroup, IP = XXXXX, Session is being torn down. Reason: L2TP initiated
I don't understand why it doens't work....I tried many templates from the net but nothings works.
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Jan 25, 2011
We have ASA 5520 running 8.2(3) software and we're trying to make Remote Access VPN (l2tp/ipsec) working from Android. We succeeded in making IPSEC tunnel (ending "Phase 2 completed"), but we cannot make L2TP tunnel working.We're using RADIUS for L2TP authentication, but ASA doesn't even try to check credentials entered by use. The same set of credentials entered on Windows {XP, VISTA, 7, Mobile} works ok. Which debugging options should we turned on?
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Nov 20, 2011
Cisco ASA 5505 ver 8.4. Most things work but now I want to setup a vpn connection..I have done this 2 ways, first by using the "VPN Wizard" in ASDM and then 5 hours later removing everything and configuring from cli. And it just doesn't work, client (WinXP & Win7) gets "error 792" and sometimes "error 789" (both indicating problem with phase 1, I'm pretty sure of that) Googling on those gives a few suggestions none works. All I get in the log on Cisco is the "Error processing payload: Payload ID: 1" Google on that only comes up with a few pages telling me this message is caused by an error. (Yeah, I could never have guessed...) For the cli config, I followed this tutorial carefully (3 times actually...) url...I'm using PSK for IPSec, entered same on Cisco and client - checked several times, this is not a password/PSK issue. Ports opened on Cisco: 500, 1701, 4500 (For a try I opened all ports, no change.) And here's the "show run". [code]
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May 22, 2013
I have a 5510 that i have configured for L2TP over IPSEC, not using AnyConnect. The first, and most prevelant being, VPN clients are unable to ping/access any of the hosts that are assigned a static NAT from the inside interface to the outside interface. I was able to circumvent this by adding another static NAT to the public interface for the incoming clients, but this caused intermittent connectivity issues with inside hosts. The second issue involves DNS. I have configured two DNS servers, both of which reside on the internal network and are in the split_tunnel ACL for VPN clients, but no clients are using this DNS. What is the workaround for using split tunneling AND internal DNS servers, if any?
i've had two different CCNA's look at this numerous times to no avail. A ping from a VPN client to any internal host works fine, unless it is one that is NAT'd. You can see in the config where i added the extra STATIC NAT to try and fix the issue. And this works perfectly across the tunnel but only intermittenly from the internal 10.1.4.x network. [code]
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Jun 23, 2011
Co-worker just got a Blackberry Playbook tablet and, try as I might, we cannot get the darn thing to successfully set up a working IPSEC/L2TP vpn tunnel to our ASA 5510, which acts as a multi-purpose VPN concentrator. Any luck setting up L2TP/IPSEC VPN to ASA from Blackberry Playbook?
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Sep 1, 2011
I'm opening a new topic related to my problem with the VPN connection, to avoid confusion, since there are many, in the old information, no longer required.
I would like to configure my ASA5510 L2PT/IpSec to accept connections from Windows clients. I happen to authenticate via AD credentials. When I try to connect is because the error 691. I enabled debugging on the machine the following:
debug crypto isakmp 3
debug crypto ipsec 3
debug ldap 255
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Nov 14, 2011
i configurated ipsec vpn at cisco asa 5510. all them are working very well. now i want to change ipsec remote vpn to L2tp over ipsec.i have router, asa and 3750 switch. all nat translation are done at router , ipsec vpn configurate at asa.
this is my ipsec configuration. this is working config. as you see i do static nat asa outside ip for vpn at router. now i want l2tp over ipsec. before i do it i have some question
1. must i do static nat port udp 1701 for l2tp over ipsec vpn? can i write access list at asa to open port 1701?
2. can i remove this static nat or i can not be change anything.is this nat is true for l2tp over ipsec vpn?
3.as you see user authentication from radius server at ipsec vpn. i also want this is same as l2tp over ipsec vpn..
4. i think that i must be add this addtional config. is this true? tunnel-group DefaultRAGroup ppp-attributesno authentication chapauthentication ms-chap-v2
is this config enougth for l2tp over ipsec vpn?? what is addtional config i need?
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Mar 3, 2012
I have added an ASA 5510 to my network between the Internet and a Windows 2008R2 server running ForeFront TMG. Before the ASA was added, vpn clients using Microsoft Windows 7 vpn client using L2TP/IPsec connected to our vpn. After ASA was added, clients can no longer connect. I would like to know how to configure the ASA to forward the vpn requests to the ForeFront TMG server for authentication and access to internal network resources. Mail is forwarded appropriately through the ASA to internal mail server and Internet access for LAN users works just fine.
Topology:
ASA 5510 (outside interface is ISP IP address, inside interface is 192.168.1.1)................Forefront TMG (outside nic 192.168.1.2, inside nic is LAN gateway IP address).
I have altered the registry key of the client vpn pc's per Microsoft Technet URL
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Feb 15, 2012
I have a ASA 5510. I setup basic configuration to test internet with 2 ISPs. My first line works with out any problem. But my second line doesn't work. Even when i wipe the configuration, and setup only my second isp. Internet doesn't work. Can you tell me if there is anything wrong with this config?
CaaaA01# sh run
: Saved
:
ASA Version 8.3(1)
!
hostname CaaaA01
domain-name example.com
[code].....
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Apr 5, 2011
since our update of Cisco ASA 5510 (active/standby cluster) from version 8.22 to version 8.24 it isn't possible to transfer files from/to a sftp client. The request just times out. SSH from this client is possible.
[Code]...
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Jul 17, 2011
I have a Cisco ASA 5505 Firewall. I am using windows VPN. I have configure IPSEC/L2TP Vpn. And now i hv some problem..
1) VPN is connected but I notices that VPN client connection gets in "HANG" mode after couple of minutes.
2) I am getting error when i try to connect my SQL Server (windows 2008) [code]
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Oct 12, 2012
I am setting up a simple remote IPsec VPN with a ASA 8.4. All I want to do is the remote user can VPN into the ASA, from there, he can browse the outside Web pages in the internet. and we'd like not to use split-tunneling. The outside infterface is 192.168.1.155/24, which is inside our network and this subnet works fine to outside. The pool for vpn is 192.168.0.0./24 (please pay attention to the 3r octet)
I configured and the remote user can vpn in and get an IP from the pool. but it seems that he cannot do anything. he cannot ping anything.I suspected the NATTing that i use. What is configured wrong? What traffic need to be natted and what need not.
======:ASA Version 8.4(2) !
!interface GigabitEthernet0description VPN interfacenameif outsidesecurity-level 0ip address 192.168.1.156 255.255.255.0 !interface GigabitEthernet1description VPN interfacenameif insidesecurity-level 100ip address 192.168.0.1 255.255.255.0
!ftp mode passiveobject network obj-192.168.0.0subnet 192.168.0.0 255.255.255.0object network obj-192.168.1.155host 192.168.1.155access-list EXTERNAL extended permit ip any any access-list EXTERNAL extended permit icmp any any access-list vpn extended permit ip 192.168.1.0 255.255.255.0 192.168.0.0 255.255.255.0 pager lines 24mtu outside 1500mtu inside 1500ip local pool testpool 192.168.0.10-192.168.0.15ip verify reverse-path interface outsideicmp unreachable rate-limit 1 burst-size 1icmp permit any outsideicmp permit any insideno asdm history enablearp timeout
[code]....
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Jul 15, 2012
My router is Cisco 2811 with IOS version 12.4(22)T1. It had established IPSec with another peer (203.*.*.250 shown below) for long until recently we make it re-establish IPSec VPN with another peer (203.*.*.30 shown below). It showed that the new sa is active but the result still showed there were 4 deleted SAs. The 4 obsolete sa entries won't vanish no matter what I do i.e. reset the interface, re-create crypto map, clear all sa and etc.
From numerous testings we knew that the VPN doesn't work even the desired sa is there remaining active. I reckon it has something to do with those deleted sas ( i mean it is supposed to show only the last one if it is working fine ). I don't know how it would be come like this as we did pretty much the samething on other VPN routers with no problems.
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Apr 7, 2011
I'm trying to setup a L2TP over IPSEC vpn connection on a PIX 501 that will use key sharing. In addition, I have a PPTP connection setup which allows connectivity. Two things, the L2TP vpn client I am using does not connect and times out. The second is that the PPTP client I use does connect, but cannot ping any resources on the network.
The config on the PIX is below:
Building configuration...
: Saved
:
PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password tdkuTUSh53d2MT6B encrypted
[ Code] .....
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Apr 11, 2013
I am trying to get a L2TP/IPSEC VPN going on one of my servers behind the DIR655 router I have used Port Forwarding and Virtual Server and neithere seem to allow these ports to be open in either situation a port scan shows the ports closed..My ISP (Comcast) does not block these ports?
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Oct 28, 2011
I had my PPTP VPN working great at my old place, now that I moved I also upgraded my speed which means I got a different 2Wire. This 2Wire can only do DMZ mode and can't bridge. ( I tried everything, including the mdc page, no go). This works fine apart from blocking GRE somehow. I'm using a Mikrotik RB450G as my PPTP server. Does L2TP or IPSEC use the GRE protocol?
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Nov 26, 2011
I have a stable l2tp/ipsec config that I have been using for many years with the Windows XP native VPN client and the iPhone VPN client.This configuration does not seem to work with the native Windows 7 VPN client. What has changed between XP and 7 on the native VPN client front? I'm running IOS 12.4(15)T5.
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Apr 20, 2011
I have a Cisco 7200 and need to establish L2TP over IPSEC session with a Draytek Fly200. Draytek must use L2TP over IPSEC to provide LAN-to-LAN connectivity. IPSEC phase 1 and 2 is ok, L2TP tunnel is also established, but on cloned virtual-access IPCP negotiation is not completed:
*Sep 16 09:50:36.911: %LINK-3-UPDOWN: Interface Virtual-Access3, changed state to up
L2X_ADJ: Vi3:midchain adj reqd for ip 0.0.0.0, cid 0
*Sep 16 09:50:38.911: Vi3 IPCP: O CONFREQ [REQsent] id 2 len 10
*Sep 16 09:50:38.911: Vi3 IPCP: Address 192.168.176.2 (0x0306C0A8B002)
*Sep 16 09:50:38.911: Vi3 IPCP: Event[Timeout+] State[REQsent to REQsent]
I think my VPDN configuration from Cisco side is not correct, but I cannot find configuration examples for this kind of solution.
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Jul 26, 2012
We are using the newest release of AD Agent (1.0.0.32.1, built 598). The ASA Firewalls 5520 are having the software release 8.4(3)8 installed.When somebody tries to connect thru the Identity based firewalls from a citrix published desktop environment (PDI) the connection is not possible. Checking the ip-of-user mapping on the firewalls (show user-identity ip-of-user USERNAME) mostly doesn't show the mapping of the USERNAME and the PDI the user is logged in. The user-of-ip mapping of the PDIs IP-address shows mostly other users, which then are used to authenticate the acces thru the firewalls.
What is interesting, that on the AD Agent using "adacfg.exe cache list | find /i "USERNAME"" i can't see the PDIs IP-address neither because it is mapped to another user.Is Citrix Published Desktop environment supported to connect thru Identity based Firewalls? How AD Agent, Domain Controllers and Firewalls are working together? On the firewalls with "show user-identity ad-agent we see, the following:
-Authentication Port: udp/1645
-Accounting Port: udp/1646
-ASA Listening Port: udp/3799
Why Cisco does use 1645 and 1646 and not 1812 and 1813?The Listening Port is used for what purpose? we tried the AD Agent modes full- download and on-demand with the same effect.
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Feb 23, 2011
Successfull in setting up an L2TP/IPsec tunnel through NAT-T against a Windows 2008/ R2 RRAS server? I am using an 881 router and the layout is someting like this:Client -> 881 -> NAT -> internet -> Windows 2008 RRAS.The tunnel goes form the 881 to the Windows server (not from the client...).
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Mar 25, 2011
i have configure l2tp/ipsec vpn on cisco ASA 5520 and also configure windows 7 client but its getting error
Error in ASA debug log
debug crypto isakmp 7
Mar 26 07:44:28 [IKEv1]: IP = 59.161.130.13, IKE_DECODE RECEIVED Message
[Code]......
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Mar 26, 2013
i am now trying to configure a Cisco Small Business Pro SRP 521w router for a branch office, i am trying to get the router to connect to a L2TP VPN server inside my datacenter, but seems to me like L2TP VPN client function is not supported inside the SRP 521w router.
Can Cisco implement L2TP VPN client into the firmware for the SRP 521w router in the future ?
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Dec 29, 2012
Any good vpn config for a router to allow vpn connections from Android phones using L2TP-IPSEC? Router is an 1841 running most current IOS ver 15.1.
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Apr 7, 2013
I'm having problem establish l2tp/ipsec vpn connection from Windows vista/7 vpn client to cisco 1921 ( ios 15.2 )
C1 --------> (internet cloud) ---------> (cisco 1921)----->LAN
Error that I'm retrieving is always the same: Error 789: "The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer"
But I'm able to establish l2tp/ipsec vpn connection to the same vpn server with my iPhone 4.
Below is isakmp debug log from lns router(cisco 1921) when I've tried to establish vpn with windows client. Anything useful from these logs to point me on the right direction to finally solve this problem with windows clients.
#debug crypto isakmp
*Apr 8 10:56:47.018: ISAKMP (0): received packet from 186.51.43.137 dport 500 sport 987 Global (N) NEW SA
*Apr 8 10:56:47.018: ISAKMP: Created a peer struct for 186.51.43.137, peer port 987
*Apr 8 10:56:47.018: ISAKMP: New peer created peer = 0x3296C24C peer_handle = 0x80000068
[Code]...
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Aug 22, 2012
Is it possible to configure Layer 2 Tunneling Protocol (L2TP) over IPsec on a cisco router like 1921 ISR? This link shows basically what i want to achieve but instead of an ASA, i would like to use just a router with sec..
[URL]
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May 2, 2011
I’m configuring a L2TP IPSEC VPN on a 5505 asa so that windows 7 clients can natively connect. It connects correctly during Phase 1 and 2, but I can’t ping anything or access resources on the internal network. This is my first time working with an ASA.
Master# sh run
: Saved
:
ASA Version 8.2(2)
!
hostname Master
domain-name service.local
[code]....
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Nov 14, 2011
I have one outside interface with global IP address 1.1.1.1 and two inside.Both inside interfaces restrict and non_restrict have private IP addresses.I tried to filter some URLs on PIX515 IOS 7.2, only on restrict interface but my filter does not work.I can access prohibited URL from restrict interface. What's wrong in my URL filtering?
Here is my config:
PIX Version 7.2(2)
!
hostname pixfirewall
enable password 8Ry2YjIyt7RRXU24 encrypted
names
[code]....
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Jun 3, 2013
A couple of weeks ago, one of our ASA 5505s failed, and Cisco TAC shipped out a replacement. I was on vacation, and my assistant worked with TAC to get our backed-up configuration restored to the new hardware. This backup was just a copy & paste of the "show start," rather than an export done from ASDM. Anyway, since I got back on vacation I was able to iron out all the wrinkles from the configuration restore, except one. The remote access VPN isn't quite working. This VPN is only used in emergencies, when I can't access that branch office's network via our WAN.
What's happening is that clients are getting "authentication failed" messages when connecting. On Windows, it's an error 691. The VPN is set to authentication against RADIUS (Microsoft IAS server). The IAS server reports that the connection and authentication is successful. AAA RADIUS authentication tests on the ASA succeed, as do authentication & authorization LDAP tests. Basically, everything was working fine before we swapped in the new hardware, and I've gone over the configuration with a fine-toothed comb to ensure nothing's changed -- but clearly, I'm missing something. The new ASA is otherwise operating perfectly.
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Nov 30, 2012
I have a server in a network DMZ (IP 192.168.40.43) need to do discovery of other IP address to update the IPAM tool. It should not be done source NAT so I´m trying to use the configuration below with Policy NAT but isn´t working:
nameif ethernet1 inside security100
nameif ethernet5 dmz8 security55
!
ip address inside 10.56.12.93 255.255.252.0
[Code]....
It´s following message appears "% PIX-3-305005: No translation group found for icmp dmz8 srv: 192.168.40.43 dst inside: 10.38.36.50 (type 13, code 0)".
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Aug 9, 2011
I would like to allow my remote users to access all resources behind the ASA and my remote branches. Here is my setup. ASA5510 as hub at data-center.
Internal network 172.21.x.x Directly connected
DMZ 172.22.1.x.x Directly Connected
Branch1 10.47.x.x L2L VPN
Branch2 10.47.y.x L2L VPN
Remote users 172.21.y.x L2TP Windows Client
I can access my internal resources connected to the ASA but not the DMZ or branch offices. Do I need routing and reverse route injection?
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Sep 2, 2012
we have a local Netflow collector working fine. We also have a centralised collector that we’d like to use to send the same Netflow data, but it is not being received. We need to send the data via an IPSEC VPN.
When I do a 'show flow-export counters' I can see the packets sent increasing. The local collector is receive netflow data. I am using the below config,
access-list global_mpc extended permit ip any any
!
!IP far end of VPN
[Code].....
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Nov 29, 2012
we have a Cisco ASA 5510 8.4, this device is reachable through a lan to lan IPsec vpn. We are able to activate the netflow export (we see flow export counters incrementing), but the flow is not passing through the vpn. Our netflow collector is on the other side of the IPsec tunnel so we define it linked to the internet interface.Is the export possible through the vpn? I read in a Solarwinds forum that it should not be possible.What ip address is choosen as source interface by ASA? Is there a way to force a source interface?
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Jun 11, 2012
I working on a security solution using ASA firewall. Is it possible to setup a IPSec tunnels on each subinterface of a physical interface on ASA 5510?
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