Cisco VPN :: Using ASA 5510 With L2L And L2TP
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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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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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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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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Jun 13, 2013
Is it possible to pass 802.3 packets over a L2TP?If so, how would the tunnel differ from a normal L2TP?
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Jun 13, 2011
There is so much mis-information on the Internet and Cisco's own support site has bits and pieces everywhere (I've found at least 5 support pages in Cisco that address this subject), none work or are directly targeted at what I would consider is a major use case for this product. I can see from the many posts everywhere that getting L2TP/IPSEC to work is a major problem, requiring many configuration steps that all have to be perfect and there seems to be some trick to get it to work that most people struggle with. Most of the advice out there is impertinent and highly technical but doesn't work.
I would like to know if there is any consolidated instructions that WORK to create a VPN server on the 5505 using the ASDM and also how to set your Windows 7 (or 2008) client to work with it.
Like I've said, I've spent hours and hours on this and have yet to get anything to work. I have a brand new 5505 connected directly to DSL (static IP) that I ran the wizard on and followed the best advice I could find (by the way there's TONS of information on getting XP to work but afaik, this does NOT work for windows 7). Now that I've tried various things without success, I believe I've gotten it so fouled up I need to reset to factory defaults and start over.
I also have another brand new 5505 connected to a different DSL line. Behind that firewall, I have both windows 7 clients and windows 2008 server. I've tried lots of different things to get these to work including the registry hacks (which, if indeed is required, I seriously can't believe that Cisco hasn't given us a tool for).
I have tried to use the ASDM to do all my programming as I find the CLI to be extremely error prone and virtually incomprehensible.So, what the world needs is one place that gives all the instructions on what to do, step-by-step that really work for this simple use case of windows connecting to the ASA.
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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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Sep 12, 2011
A office use Windows Server 2008 R2 (routing and remote access) for user VPN connection.At other location B office, I want to setup a router (RV120W Wireless-N VPN Firewall) for L2TP VPN connect to A office.B office use ADSL dial connection, and set a Dynamic DNS for the router. how to configuration the L2TP VPN.
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Mar 3, 2013
I have an 1921 that I use for L2TPv3 tunnel connection with 2 sides. I need to add others 2 sides and I thought to add an EHWIC-4ESG on my router. Can I configure different xconnections with this module? I would like to configure my router as below: [code]
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Oct 1, 2012
i did in past a lot of L2TP connection between two end point. in this case ans with 2911 series with ios 15 and DATA license Activated. the l2tp session does not establishe between a this 2911 and 7209. Attached is topology file and bellow the configuration of both router.
PE 2911
l2tp-class l2-dyn
authentication
password 123456
[Code]....
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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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Jul 6, 2011
I have configure L2TP vpn using ASDM and now i am not able to connect my Cisco ASA 5505. it's showing error message 3Jul 07 201118:57:38IP = *.*.*.*, Error processing payload: Payload ID: 1
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Jun 13, 2013
we are testing an ASR1002-X which acts as LNS for L2TP tunnels.
- All tunnels are UP (sh vpdn all return list of tunnels)
- VirtualAccess interfaces are UP
- C routes are added in routing table
but ping remote IPs don't work !!! [code]
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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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Jun 13, 2013
We are testing an ASR1002-X which acts as LNS for L2TP tunnels.
- All tunnels are UP (sh vpdn all return list of tunnels)
- VirtualAccess interfaces are UP
- C routes are added in routing table
but ping remote IPs don't work !
LNS1# sh ver
Cisco IOS Software, IOS-XE Software (X86_64_LINUX_IOSD-UNIVERSAL-M), Version 15.3(2)S1, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
[Code].....
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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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Sep 16, 2011
I have two virtual machines (of Oracle VirtualBox). On one of them,I installed Windows Server 2003 and on the other I installed Windows XP (SP3). I made two VPN connections between them one is PPTP-based and another is L2TP-based. Now I want to transfer a file from the server side to the client side (Windows XP) once using the PPTP-based VPN connection, and again using the L2TP-based VPN connection. And by using the network monitor (protocol analyzer), I have to determine which protocol is more secure than the other.how to know which one is more secure using the network monitor?
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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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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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May 25, 2011
I have a Windows 2003 server running a L2TP VPN server on it. I'm putting theASA5505 in replacement of an open source firewall.
My question is that, I can't seem to forward the ports correctly for L2TP to the internal address of the 2k3 VPN server. It seems to me that the ASA is trying to negotiate the VPN connection rather than forward it internally.
Cisco ASA5505
WAN 216.136.1.2
LAN 10.1.1.1/24
Windows server - 10.1.1.14
I've added the NAT and ACL and still nothing.
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Nov 1, 2011
We just purchased the WRVS4400N router with high hopes. For some reason, our ISP provides a connection through L2TP Dynamic for a static IP. I repeat, L2TP Dynamic. Is there anyway to properly configure the router to use such a connection method. I only see L2TP Static, which seems to be the standard method for many routers.
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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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Aug 12, 2010
I am trying to configure L2TP Client-Initiate Tunneling on a cisco 1941 with C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(2)T0a, RELEASE SOFTWARE (fc1).
I have two 1941 and trying to tunnel the VLAN's across a point to point T1 connection. The reason for this is because one of the vlans on the remote end needs to be in a DMZ. The problem that I am having is that is allows me to setup the l2tp class but the pseudowire-class command is not available. Is there somthing I am missing? According to Feature Navigator L2TP Client-Initiate Tunneling is available in the IOS I am using
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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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Nov 17, 2011
Have a few users on Vista/7 using Windows L2TP to connect to our ASA5510. It is reported that after a few hours the connection drops. From what I have seen this can be anywhere around 5-6 hours. Of course my connection will drop after an amount of time has passed and no traffic has passed the tunnel. But the users are adament that this drops during large transfers; i.e. not a timeout issue. Before I spend anymore time on this I just want to know if this is normal behavior for a remote access L2TP using Windows to disconnect on it's own after this amount of time. Never had a reason myself to remain connected that long, and when I did I used a site 2 site tunnel.
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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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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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