Cisco VPN :: 1921 - IOS L2TP IPSec With Windows VPN Client

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 dport 500 sport 987 Global (N) NEW SA
*Apr  8 10:56:47.018: ISAKMP: Created a peer struct for, peer port 987
*Apr  8 10:56:47.018: ISAKMP: New peer created peer = 0x3296C24C peer_handle = 0x80000068

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Cisco WAN :: Layer 2 Tunneling Protocol (L2TP) Over IPsec On ISR 1921

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..

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Cisco VPN :: L2TP / IPSEC Not Working In Windows 7

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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Cisco VPN :: ASA 5520 - L2TP / IPSEC Not Working In Windows XP / 7

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 =, IKE_DECODE RECEIVED Message


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Cisco WAN :: L2TP On 1921 With EHWIC

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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Cisco VPN :: Remote IPSec VPN - Windows 7 Client And ASA 5505?

Dec 20, 2011

I have difficulties with configuring Remote IPSec VPN with Cisco ASA 5505 and Windows 7 native VPN client. My client PC gets VPN pool IP address, and can access remote network behind ASA, but then I lose my internet connectivity. I have read that this should be an issue with split tunneling, but I did as it is told here and no luck.On Windows VPN Client settings, if I uncheck "use default gateway on remote network" I have internet connectivity (since client is using local gateway), but then, I cannot ping remote network.In log, I see this warnings of this type:Teardown TCP connection 256 for outside: to outside: duration 0:00:00 bytes 0 Flow is a loopback (cisco)I have attached my configuration file (without split-tunneling configuration I tried). If you need additional logs I'll send them right away.

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Cisco Routers :: Windows 7 32 Bit IPSec Client To RV220W Error 789

Oct 9, 2012

I try to connect to RV220W with windows 7 client but  I fail : error 789. I compare again and again pre shared key, but it doesn't change anything. How to connect to RV220W with IPsec client ?

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Cisco Routers :: RV180W VPN Using IPsec And Windows 7 / 8 Built In Client

Apr 10, 2013

Is it possible to configure the RV180W VPN to use IPsec and connect to that VPN using the built in windows vpn client in Windows 7 and 8?I have been testing this but I have not been able to get it to work. What are the settings on the Router to make it compatable with the Windows VPN client?What are the settings I need in the Windows VPN client to allow it to connect to this router?I initially setup the QuickVPN client and that worked, but some of my users can't get it to work and I thought this might be a good alternative to try for those users.                  

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Cisco VPN :: IKE-UDP500 / Windows Firewall IPSEC Bypass Across Remote Client VPN?

Jun 15, 2011

I am trying to implement IPSec Authenticated Firewall Bypass on windows vista clients within my microsoft domain to avoid implementing numerous windows firewall port exceptions for each client.

This is working internally on our network, between services servers (i.e AV server), and desktop clients. However i am having a problem when the clients are remotly accessing the domain via the VPN client.I have open traffic ports (IKE-UDP500, ESP - IP Prot 50, AH - IP Prot 51) bidirectionally between the remote vpn clients subnet and the services servers, however when the endpoints initiate traffic to the services server, the IKE traffic is unencrypted?

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Cisco VPN :: PIX 501 - L2TP Over IPSEC VPN Connection

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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RB450G Does L2TP Or IPSEC Use GRE Protocol

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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Cisco VPN :: 7200 - L2TP Over IPSec With Draytek

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, 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 (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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Cisco VPN :: 5510 - L2TP Over IPSEC Static NAT

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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Cisco VPN :: Setting Up L2TP / IPsec VPN To ASA 5510

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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Cisco VPN :: ASA 5510 - VPN L2TP / IPsec Error 691

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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Cisco VPN :: Can 881 Router Create L2TP / IPsec Tunnel Via NAT

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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Cisco Routers :: Is L2TP Over IPSEC VPN Supported In SRP 521w

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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Cisco Security :: Change Ipsec Vpn To L2tp Over ASA 5510

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 this nat is true for l2tp over ipsec vpn? 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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Cisco VPN :: 1841 - Android Smartphone L2TP IPSEC On IOS

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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Cisco VPN :: ASA5520 - IPSEC Tunnel On Android Comes Up But L2TP Doesn't

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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Cisco VPN :: ASA 5505 Firewall - IPSEC / L2TP Vpn Hang After Some Time

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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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

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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Cisco VPN :: Forward L2TP IPsec 5510 Requests To ForeFront TMG Server

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.

ASA 5510 (outside interface is ISP IP address, inside interface is TMG (outside nic, 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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Cisco VPN :: Configuring L2TP IPSEC VPN On ASA 5505 / Can’t Ping Or Access Resources

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


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Cisco WAN :: 1941 - L2TP Client-Initiated Tunneling

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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Cisco VPN :: 1921 Router Q - How Many IPsec Tunnels Will It Support

Nov 8, 2011

I need to know how many IPsec VPN tunnels one Cisco1921 can support reliably. Haven't had any luck sifting through documentation on the web.

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Cisco VPN :: 1921 - No Local Network / Internet While On IPSec VPN

Dec 28, 2011

I am testing a EasyVPN IPsec server set up on a cisco 891. Here is how I have it set up right now- the 891 is connected to our backup internet connection (different ISP from our main line) and we have a cisco 1921 as our production router.
I am experiencing a problem where when I am on our internal network off the 1921 and I connect to the VPN on the 891 I lose all local network connectivity. Nothing works, can't ping, can't telnet to the 1921, can't browse the internet, its not just DNS either.
I believe the issue lies in the configuration of the IPSec server on the 891 because when I connect to our client's cisco IPSec VPN I experience full local connectivity with no issues whatsoever. It seems to me that ALL traffic is being routed through the tunnel.
Other than the local issues the VPN is working fine and I can remote desktop to the PC I have set up off the 891 and telnet to the 891 from there.
Current configuration : 8967 bytes
! Last configuration change at 20:45:17 UTC Thu Dec 29 2011 by admin
! NVRAM config last updated at 19:52:26 UTC Thu Dec 29 2011 by admin
version 15.0
service timestamps debug datetime msec


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Cisco Firewall :: 1921-SEC / Terminate Each IPSec Connection In Separated Zone

Apr 26, 2011

We are using a CISCO1921-SEC Router. On the "WAN" side we have 1 public IP Adress assigned by DHCP. At the moment we are using the WAN Interface with a crypto-map as endpoint of some IPSec connections. We set up a zone-based-firewall with "WAN" and "LAN" zone. In this setup all IPSec Endpoints are on one Interface - connections to the "LAN" zone can be managed by rulesets. What about connections between IPSec connections and the zone "self".We like to terminate each IPSec connection in a separated zone. How can this be configured ?Each one on a "tunnel inetface" with "tunnel source ..." binding ?

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Cisco WAN :: 1921 Provide IPSEC Tunnel Back To Central Office

May 5, 2011

Equipment Cisco1921, HWIC-1ADSL, 2 x GB Ethernet interfaces (Only one used for local LAN) Software IOS Version 15.1(1)T2..I have been asked to configure this router to provide an IPSEC tunnel back to our central office.We have been provided with an ADSL business class 7MB service from Telecom Italia, they have presented the circuit to our office with no terminating equipment (wires only). Telecom Italia have provided us with some IP addressing information as follows (I will not disclose the entire IP address) [code]

I can see that the packet count is increasing both inbound and outbound on the ATM interface. I have read many documents and tried many different way to try and get this resolved, I even logged a call with Cisco but no dice.

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Cisco WAN :: 1921 PPTP Client Authentication To ISP

Nov 9, 2012

My ISP has just implemented a new network on the cable infrastructure which uses a PPTP authentication method.  It works on my Cisco RVS4000 router as there is an option to set PPTP as the WAN type.  The only trouble with the RVS4000 is that the performance is very poor, hence I am trying to get it working with a Cisco 1921.  I have looked high and low and I cannot find an sample of a Cisco router functioning as PPTP client to a ISP.Enclosed is the screen shot of my Cisco RVS400 with the options etc.

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Apr 20, 2011

We are using a CISCO1921-SEC (ISR) with IOS 15.1 and we configured a "crypto isakmp client configuration group". We can connect with the "Cisco System VPN Client Version" via IPSec/UDP.

1. Is it possible to push routing informations to the System running the VPN Client ? A the moment all traffic is routed to the tunnel but we like only one route to the network permitted with "pool ..." in the "crypto isakmp client configuration group NAME" section.

2. We searched for changing from upd connection to tcp connection via special port. Is it possible with IOS 15.1 on the CISCO1921-SEC ? Is there something possible like "iskamp ipsec-over-tcp port 10000" ?

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Cisco VPN :: 1921 / EasyVPN Client Gets Assigned IP But Cannot Ping Anything Else

Aug 28, 2011

(Router is ISR 1921)This is doing my head in. I am not using NAT, there are no ACLs, there is no split horizon.Here is what I have. It is practically generated by CCP. When connected I cannot ping the loopback interface or the gig0/0 interface, (not to mention anything else).
version 15.0
service config
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname dcsgw1


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