Cisco WAN :: 1941 Router - Enable IPSec Virtual Tunnel Interface With Tunnel Mode IPv4

Sep 23, 2012

I'm in process of purchasing a new Cisco routers for our branches that will be used primary to enable IPSec virtual tunnel interfce with "tunnel mode ipsec ipv4". does the default IOS IP Base supports this feature? or i need to purchase DATA license or SECURITY license?

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Cisco WAN :: C3750ME / Add Or Remove IPv4 Address From Tunnel Interface Getting This Log?

Jan 3, 2007

I have a Catalyst 3750 Metro running 12.2(25)EY4.Every time I add or remove an ipv4 address from a tunnel interface I have the following log:
Jan  4 10:42:19.088: %PLATFORM_HCEF-3-ADJ:  Insane handle in add LT7
-Traceback= 25222C A81C70 A7B28C B08958 B28940 B2A2E0 B2A684 B9EFA4 B9F004 B9F684 B9F814 B9F99C B8E3BC BA1BD8 3DFA94 39BA3C

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Cisco Switching/Routing :: 1941 / IPSec Tunnel Up No Traffic?

Mar 7, 2013

I have an IPSec tunnel configured on my Cisco 1941. The other device is an ZyXEL router.I can see the tunnel is up but there is no traffic.This comes out the show crypto ipsec sa

interface: Dialer1
Crypto map tag: CMAP_AVW, local addr
   protected vrf: (none)
   local  ident (addr/mask/prot/port): (
   remote ident (addr/mask/prot/port): (
   current_peer port 500


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Cisco Routers :: Set A VPN IpSec Tunnel GW To GW Tunnel Between RV110W

Oct 17, 2012

I am using a Cisco RV110W (Firmware 1.2.09) in a branch and I would like to create a VPN Tunnel to another site that has a Cisco RV042 (firmware v4.2.1.02)
What would be the correct Configuration? the current configuration I am using is
in the RV042 i am using
Check Enable 
Local Group Setup
Local Security Gateway Type : IP Only
IP Address : RV042 Pulbic IP address


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Cisco Firewall :: IPSec Tunnel On Sub-interface On ASA 5510?

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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D-Link DIR-615 :: Setup IPv6 In IPv4 Tunnel With Tunnerbroker Service

Mar 24, 2013

Recently I wanted to setup IPv6 for my home network. I signed up for service and was provided with IPs. Then I configured the IP address in my DIR-615. But It's not working..

Screenshot of IPv6 config (router) : Screenshot of my Win 8 network Config : I also tested at [URL] but failed...

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D-Link DIR-825 :: Firmware 2.05NA - How To Get IPv6 In IPv4 Tunnel Working

Jun 9, 2011

I have a Dlink DIR-825 B1 with firmware 2.05NA.  I recently reset it to factory defaults to make sure I didn't misconfigure something.

I have been struggling to get a IPv6 in IPv4 tunnel working with  I think the issue is a problem with the router itself and i'm not sure how to get it fixed.

All of my machines were getting IPv6 addresses (both windows, mac, linux) but none of them seemed to work.  All I was able to do was ping the gateway itself using the local lan address.  In each case they were missing a default IPv6 route.  If I added a default route then it would work.

I started looking at the packets using a network sniffer and the Router Advertisements all had a Router lifetime value of "0" which is RFC4816 speak for "don't use this router as the default router".  So Windows/Linux is exactly right by not setting a default route.  

The strange thing was that when I reboot the router I would briefly get a router advertisement with a lifetime of 1800s, the corrert prefix and dns server but then another router advertisement would come along 5 seconds later with a router advertisement of 0.

I have TCP' Other observations

... using 6to4 I would get working IPv6 address.  The difference again seemed to be the Router Lifetime.  But I want to use a permanent tunnel.  I have found 6to4 unreliable.

... the router never responds to router solicitations.  It only sends a router advertisement when it wants to.

... the router never responds to DHCPv6 when that is configured.

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Cisco :: L2L IPSec Tunnel - ASA To 3800 Router

Mar 3, 2011

I have been struggling for a few days with getting site-to-site traffic working across a L2L IPSec tunnel. At this point, I have the tunnel up, and I see packets being decrypted on the correct IPSec SA's when I ping from a local network computer on the ASA side to a local network computer on the router side. I cannot ping from one side to the other, but those packets are getting through. We have another L2L tunnel that is from that ASA to another remote site's ASA, and that is functional. I have mirrored the configuration for ACLs, etc. from that site, so I believe that the issue is with the packets getting incorrectly translated by the NAT/NONAT statements/ACLs on the router side.

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Cisco VPN :: L2L IPSec Tunnel - ASA To 3800 Router?

Mar 2, 2011

I have been struggling for a  few days with getting site-to-site traffic working across a L2L IPSec  tunnel.  At this point, I have the tunnel up, and I see packets being  decrypted on the correct IPSec SA's when I ping from a local network  computer on the ASA side to a local network computer on the router side.   I cannot ping from one side to the other, but those packets are  getting through.  We have another L2L tunnel that is from that ASA to  another remote site's ASA, and that is functional.  I have mirrored the  configuration for ACLs, etc. from that site, so I believe that the issue  is with the packets getting incorrectly translated by the NAT/NONAT  statements/ACLs on the router side. 

The ASA is: Cisco Adaptive Security Appliance Software Version 8.2(2)Hardware:  

ASA5520, 512 MB RAM, CPU Pentium 4 Celeron 2000 MHz The router is:Cisco IOS Software, 3800 Software (C3845-ADVENTERPRISEK9_SNA-M), Version 12.4(20)YA3, RELEASE SOFTWARE (fc2) Router Config:!version 12.4!card type t1 0 0!no ip cef!ip multicast-routing no ipv6 cef!crypto isakmp policy 10 encr 3des authentication pre-share group 2crypto isakmp key xxxxxxx address nn.nn.12.130!crypto ipsec security-association lifetime seconds 86400!crypto ipsec transform-set 3DES-SHA esp-3des esp-sha-hmac !crypto map NOLA 11 ipsec-isakmp set peer nn.nn.12.130 set transform-set 3DES-SHA set pfs group2 match address VPN-ACL!controller T1 0/0/0 fdl both cablelength long 0db channel-group 1 timeslots 1-24!interface Loopback0 ip address ip virtual-reassembly no ip route-cache crypto map NOLA!interface GigabitEthernet0/0 no ip address duplex auto speed auto media-type rj45!interface


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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 VPN :: Configure Remote Vpn Ipsec Tunnel On 800 Router?

Mar 19, 2012

how can you configure remote vpn ipsec tunnel on a Cisco 800 router?

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Cisco VPN :: 1941 Tunnel Up But Can't Reach Devices?

May 23, 2013

We set up a 1941 Router with the Cisco Configuration Professional Tool. The VPN Tunnel works and i get an IP Adress from the pool. But i cant reach any devices in the VLAN10 Network. Do i forget anything ?
Here is the config from the Router:
version 15.1
parser view CCP_Monitor
secret 5 $1$FnN7$Qr.mbJbPOuOH7Te6MD1.I0
commands configure include end


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Cisco WAN :: Getting 1941 Tunnel Bandwidth Command?

May 13, 2011

I have a Cisco 1941 router with the Security license running IOS c1900-universalk9-mz.SPA.151-4.M.bin.  Is there a "tunnel bandwidth" command like with routers that have the Advanced IP Services license?  My concern is being able to adjust the bandwidth to a value greater than 8 Mbps...

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Cisco VPN :: 2921 And 1941 EAP TLS Fragmentation Across VPN Tunnel

May 7, 2012

I am having an issue authenticating users via 802.1x/EAP-TLS across an IPSec tunnel. I am using route-based VPN with SVTI configuration on a 2921 and 1941. I have the following settings defined:

- Under the tunnel interfaces:
- MTU 1390
- MSS 1350
- Under the ingress LAN interface
- route-map to set the DNF bit to 0
- On the RADIUS Server (2008 NPS)
- Framed-MTU: 1300
This had been working for months until I got a call last week about users not being able to authenticate to our secured SSID. I fired up wireshark and also used my client monitor tool in my wireless NMS to watch what is going on. I see all of the access-request and access-challenge exchanges, but the final exchange never happens. In both captures you can see messages with id's 77-81, but message id 82 isn't shown in the wireshark capture, only fragments are. In the client monitor capture you can see that message id 82 is 1726 bytes in length. Now, if I capture packets on my local LAN, the 1726 byte packet is properly fragmented and users can authenticate just fine.

I have scoured the Internet trying to find a setting that I must have missed, but I can't. I've tried adjusting the Framed-MTU, all the way down to 1100.

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Cisco VPN :: Configuring IPSec VPN Tunnel ISR 2921 Router With Watchguard?

Aug 28, 2012

I am configuring a vpn ipsec tunnel with cisco isr 2921 router and Watchguard edge 1250e. I have the watchguard configured so I just need to make sure I have everything setup on the cisco side. At this point, there is no communication as I am not sure if I configured it correctly. Should I do the crypto map on g 0/0 or dialer 1?
aaa new-model
aaa session-id common
no ipv6 cef


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Cisco VPN :: Getting IPSec Tunnel Established Between 887VA And SRP527W Router?

Jul 22, 2012

I'm having some problems getting an ipsec tunnel established between a cisco 887VA router and a cisco srp527w router.I am working from a few text books and some example materials. I have worked through many combinations of what I have got and am still struggling a little bit.I look at debug results and it appears as though the policies do not match between the devices:
Jul 23 05:44:37.759: ISAKMP (0): received packet from XXX.XXX.XXX.XXX dport 500 sport 500 Global (R) MM_NO_STATE
Jul 23 05:44:57.079: ISAKMP:(0):purging SA., sa=85247558, delme=85247558
Jul 23 05:45:17.031: ISAKMP (0): received packet from XXX.XXX.XXX.XXX dport 500 sport 500 Global (N) NEW SA


Some specific questions:
1) on the SRP in the example's I have used (and I have a few SRP->SRP VPN's that work) I see you need to enter the preshared key, I'm not seeing in the examples I have used anything about the IKE preshared key on the IOS box. Any examples where you use the preshared key for IKE? I wonder if this is my primary issue as it states clearly in the log that there is no Preshared key :|
2) I have used a mish mash of names between the various sections as on the SRP the naming convention isnt the same; ie: which parts of the IPSEC negotiation come from the IKE policy section and which from the IPSEC policy section. Do the names really matter across different ends of the VPN?
3) I notice when I perform this command in the(config-crypto-map)#:
set peer FQDN

It is converted to:

set peer XXX.XXX.XXX.XXX
Is this expected? I want the device to look at the FQDN as this particular host is using DDNS and not use a static IP address. 

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Cisco VPN :: Are Tunnel Mode And Identity Negotiable Between Router And ASA5520

Feb 10, 2011

My remote VPN device (static IP address) is setup to connect on the ASA5520 DMZ interface.

Peers performing L2L IPsec VPN with pre-shared keys sync-up regardless of which identity mode selected. If I set the router to “crypto isakmp identity address” or  “crypto isakmp identity hostname” the ASA still accepts the connection. Also tunnel mode on initiator (router) is set to “TRANSPORT” but negotiates to TUNNEL mode with ASA.

I am able to successfully ping and telnet from a remote device through the router -- ASA5520 VPN tunnel into the HQ hosts so I can see communication is working.Initial ISAKMP negotiation debugs on router (below) shows the differences but the ASA accepts anyway.

-ASA5520 8.0(4) running in router mode
-ASA should only answer, never initiate VPN sessions
-Cisco 2800 router IOS 12.4 Adv Security should always initiate the VPN session.
-Cisco 2800 router does not have option of key-id, only address, hostname and dn.

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Cisco VPN :: 1941 Encrypted GRE Tunnel Changes State To Reset / Down Upon IOS Upgrade

Jun 16, 2011

I installed a 1941 router with an encrypted GRE tunnel yesterday.  The router has ipbasek9 and securiyk9 licensed.  Initially the router was running the image c1900-universalk9-mz.SPA.150-1.M5.bin and was working fine.  The tunnel was up and passing traffic.  I then upgraded the IOS to c1900- universal k9-mz.SPA.151-2.T2.bin and when I reloaded the router the tunnel was stuck in a reset/down state.  I tried doing shut/no shut on the interface and reloading the router again, no change.  Being under some time pressure to get the device back into production I rolled back to the previous IOS image and the tunnel worked fine again.  Is there a known bug that causes this behavior?  I have searched but have not found one.  [code]

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Cisco VPN :: How To Enable Split Tunnel On PIX 501

Nov 17, 2012

I have several PIX 501's and one of them is extremely slow accessing network resources and does not have Internet access. I would like to use split tunnel and have them access the Internet throught their DSL connection and any traffic for network resources sent over the VPN. How can I improve the speed and set up split tunnel via the command line?  I dont have the PDM software so I guess I will need to do all the configuration via the command line. Below is the configuration:
PIX Version 6.3(1)interface ethernet0 autointerface ethernet1 100fullnameif ethernet0 outside security0nameif ethernet1 inside security100enable password k4HlcGX2lC1ypFOm encryptedpasswd y5Nu/Nt1/5dK8Iuf encryptedhostname


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Cisco VPN :: Ipsec Tunnel Between Two 881

Oct 19, 2011

- Ipsec tunnell between two 881's
- An Aruba access point trying to set up a tunnell back to controller through the ipsec tunnell, on udp 4500
- Even though traffic shouldn't be NAT'ed (and other traffic is not), udp 4500 is NAT'ed
I guess this might be default behaviour, thing is that it used to work when it was set up as a route based easy vpn.

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Cisco Routers :: Rv082 - Can't Check Enable Vpn Tunnel

Sep 8, 2011

According to the manual rv082, if you wan to use vpn.. check the enable
But I can't check enable botton... it's disable So i can't check

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Cisco :: How To Create Ipsec Tunnel

May 4, 2011

how to create ip sec tunnel using these parameters. customer ip where tunnel has to be connected

ISAKMP Parameters: (Phase I)
Encryption: AES-256 or 3DES
Authentication Mode: Pre-shared key


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Cisco :: IPsec VPN Tunnel Between 2820 And 871?

Mar 9, 2011

We have a Cisco 2820 that serves as a hub and our spokes are Cisco 871s. Its been working for a while and for some reason last week. Http and https traffic over the tunnel is having connection issues. I can Remote desktop or PCanywhere into the remote PCs. From that PC I can ping internal IP address or IP of the webmail server or internal webserver with no issue. But if I access it over the browser it times out or it will work and stop working again. Basically ica, icmp, pcanythere, rdp traffic works over the tunnel but not http or https.

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Cisco VPN :: Force Use Of NAT-T On IPSEC L2L Tunnel

May 4, 2011

can I force an IPSEC L2L tunnel to use NAT-T encapsulation no matter what? Automatic detection says none of the endpoints are behind NAT. I know I can disable it by the "crypto map XXX set nat-t-disable" command, but I want the exact opposite.
I have a very strange issue where asynchronos routing is making my life as a technician very hard.
A side question; Can I do something about an ISP that is policy-base-routing its ESP traffic (and/or translating it)?
ASA5505 ===>===>===> ISAKMP traffic ===>===>===> ASA5510                                                        (traffic source IP:


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Cisco VPN :: ASA Or 871 IPSec L2L To SSG-140 - Tunnel Is Up But No Traffic

Aug 8, 2012

i am curently troubleshooting a ipsec l2l VPN between
1. ASA 7.2(4) to SSG-140
2. Cisco 871W to SSG-140
In both scenario's the tunnel is nicely established, and traffic goes into the tunnel, but nothing comes out. All encap's, but no decap's                    
It seems like a routing issue, but we can not find anything on both sites.
So maybe i m running into a (known) issue between cisco VPN equipment and the SSG-140?
Could it be a proxy-id issue? Cause they configure stuff like and i configure

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Cisco VPN :: PIX-501 IPSec To Configure Tunnel

Mar 24, 2011

I'm attempting to configure a tunnel on a PIX-501 version 6.3. It's an old device that's due to be replaced soon, but unfortunately we need a tunnel now... I have been using this document as a reference (6211): URL ,The remote end is a sonicwall.
The problem seems to be that the pix never sees the interesting traffic for the tunnel, and never tries to initiate a connection. I have enabled crypto ipsec and crypto isakmp debugs, but no data is ever displayed, even when attempting to access a device on the remote side of the tunnel! Someone had tried to set up this device with some tunnels in the past, but was never successful, so I'm thinking there might be remaining commands in the running-config causing problems.

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Cisco VPN :: 887 - Static NAT With IPSec Tunnel

Oct 29, 2012

configuring some static NAT entries on a remote site 887 router which also has a IPSec tunnel configured back to our main office. 
I have been asked to configure some mobile phone "boost" boxes, which will take a mobile phone and send the traffic over the Internet - this is required because of the poor signal at the branch.  These boxes connect via Ethernet to the local network and need a direct connection to the Internet and also certain UDP and TCP ports opening up.
There is only one local subnet on site and the ACL for the crypto map dictates that all traffic from this network to our head office go over the tunnel.  What I wanted to do was create another vlan, give this a different subnet.  Assign these mobile boost boxes DHCP reservations (there is no interface to them so they cannot be configured) and then allow them to break out to the Internet locally rather than send the traffic back to our head office and have to open up ports on our main ASA firewall. 
So I went ahead and created a separate vlan and DHCP reservation and then also followed the guidelines outlined above about using a route-map to stop the traffic being sent down the tunnel and then configured static NAT statements for each of the four ports these boost boxes need to work.  I configure the ip nat inside/outside on the relevant ports (vlan 3 for inside, dialer 1 for outside) The configuration can be seen below for the NAT part;
! Denies vpn interesting traffic but permits all otherip access-list extended NAT-Trafficdeny ip ip ip


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Cisco WAN :: 7201 Option To Send All Traffic Through GRE Tunnel / L2TPV3 Tunnel

Jan 9, 2011

i have a 7201 router with NPE-G2. i have a design which i have the option to send all the traffic through a GRE tunnel or a L2TPV3 tunnel.which method is more CPU consumption ?

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Cisco :: Reach Second LAN Over Existing IPSec Tunnel?

Nov 28, 2012

since a few days I'm trying to solve a problem. I've successfully established an IPSec tunnel between two local LANs. In the main office I'm working with a ASA5510 CLI 8.4 and a static public IP address. The branches are using different Cisco 8xx routers and dynamic public IP address. The following picture shows the current configuration:As I mentioned an IPSec Tunnel between the main office "Intern"-LAN and an outside LAN is successfully established. Now there is a new intern "Admin"-LAN at the main office. The users from the outside LAN need the possibility to reach this new intern "Admin"-LAN.Can I simply route the traffic from to via the existing IPSec-Tunnel? Or need I a new IPSec tunnel between the outside LAN and the new "Admin"-LAN

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Cisco :: DNAT / SNAT After IPSec Tunnel

Aug 24, 2012

I'm going to implement a S-2-S VPN IPSec connection between 2 locations and I've to NAT incomming and outgoing traffic.

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Cisco WAN :: ASA5510 Routing Through IPSEC Tunnel

May 20, 2013

I have an ASA5510 configuration that I'd like to add to.In this configuration there is a site to site IPSEC VPN tunnel to a remote location.It is tunneling a particular subnet for me and everything is working.In the remote subnet, there is an ASA 5525-x connected on the outside interface. Let's say for argument's sake, the outside IP is the Inside interface, i've configured network.The only static route I have configured on the 5510 is the default gateway that goes to the ISP.I assumed that I have to add: route Outside 1.I did this, but i'm not able to reach the destination network. I can't see anything hitting the 5525-x and the only thing I see on the 5510 is the building outbound ICMP and the teardown for the ICMP.

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Cisco VPN :: How To Establish IPsec Tunnel Using DNS With ASA 5505

Aug 22, 2011

I´m getting a dynamic public IP from my provider and what I´m trying to do is to establish a remote vpn tunnnel using IPSec which I achieve but every time the sessions resets or the ASA 5505 resets I get a new public IP and I need to put the new IP on the remote client so I can establish the vpn... How can I establish an ipsec vpn  using DNS?  For this scenario the remote vpn client is a vpn phone but it could be for any vpn client. 
Private IP                       Public IP                                       Private IP
PBX ---- (LAN) ---- ASA 5505 ---( Internet ) --- Remote Site ( Router ) --- (LAN) -- VPN Phone

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Cisco VPN :: ASA 5505 IPSec Tunnel Not Establishing

May 7, 2012

I have a site to site IPSec tunnel setup and operational but periodically the remote site goes down, because of a somewhat reliable internet connection. The only way to get the tunnel to re-establish is to go to the remote site and simply issue a ping from a workstation on the remote network. We were having this same issue with a Cisco PIX 506E but decided to upgrade the hardware and see if that resolve the issue. It ran for well over a year and our assumtions was that the issue was resolved. I was looking in the direction of the security-association lifetime but if we power cycle the unit, I would expect that it would kill the SA but even after power cycling, the VPN does not come up automatically.

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