Cisco WAN :: Connection With IPSEC 2811 To ASA 5510
Oct 27, 2011
I have a 2811 that is my HQ router with a 10MB pipe. I was trying to configure a IPSEC tunnel to connect to my ASA that has access to our companies internal servers on the 10.33. and 172.16.31 network. I am having a problem getting phase 1 to even come up. I've looked over the configurations and unless i'm overlooking something I dont see what could be keeping it from at least completing phase 1
Below are the configs.
2811-CFG
crypto isakmp policy 10
encr 3des
hash md5
[Code] ....
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Mar 28, 2013
I've got random connection issue when I try to connect to a VPN gateway through an ASA 5510 (IPSEC client ->ASA 5510->VPN Gateway).
When the tunnel is coming up, those two lines appears in the captured traffic on the internal interface :
<private internal IP>.500 > <destination IP>.500: udp 541
<public external IP>.500 > <destination IP>.500: udp 541
When it's not coming up, the port nuimber for the public IP is not 500
(private internal IP).500 > (destination IP).500: udp 541
(public external IP).442 > (destination IP).500: udp 541
I don't understand why sometimes the port for the public external IP is 500 and sometimes not.
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Oct 11, 2011
I currently have an ASA 5510 setup with Dual homed ISP's and a remote access IPsec VPN setup to terminate at either interface. The first interface is named Outside and the second is simply called Outside-2. When outside the company(such as at home), the VPN client will connect on the Outside-2 interface and work normally. The problem is while testing on our DMZ, the VPN Client will not connect on the Outside-2 interface. It will try that interface fail to connect and then connect to the backup Outside interface. This isn't a huge concern because it still connects, but if we were ever to get rid of one of those connections, it would be nice to reliably test from our DMZ.
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Apr 10, 2011
I have created an IPSec VPN between our ASA (5510) and a Cisco Router running IOS.Only problem i have is that the VPN goes down if there's no interesting traffic from the router and i can't find anything to initiate the VPN Tunnel from the ASA (so we need to wait 'till someone connects on the other side).
Is there any way to make this connection persistent, just like an ASA-to-ASA tunnel?
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Jul 31, 2012
I have a 5510 and a 5505 that I'm attempting to configure a simple VPN tunnel over. I have tried step by step configurations form CISCO ASA configs, as well as every source I can find. I have walked throught the config with IOS commands as well as Wizards. All my packets are dropped at the the inside or outside interface.
When I show SH ISAKMP command all I get are 0's straight down.
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Jan 23, 2011
We have a remote office that needs to be connected to the central office through a site to site ipsec VPN.At the central site there is a 2811, and at the remote site there is 1841.Most of the traffic will be VoIP traffic and small amounts of data.
I need to setup some QoS that would firstly prefer the VPN traffic over internet access and then inside the VPN I need some QoS that will preffer VoIP over data.
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Jul 25, 2011
I am having problems with CPU load on 2811 with AIM-VPN-II. There is a GRE+IPSec over E3 WAN link and the authentication is done using RSA, but even that there is around 10Mb/s of traffic I have a 70 - 85%. I also have another WAN link with router 2811 that doesn't have a AIM-VPN, and that one reach 95% CPU once the traffic goes up to 5 Mb/s.
crypto isakmp policy 10
encr aes
authentication rsa-encr
[Code]....
Are there any recommendations that RSA authentication is not supportted for hardward encryption? It worries me, becouse have more sitautions like this.
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Dec 12, 2011
I am trying to get a 2811 to accept two IPSec peers however can only get one working at a time. I have setup fa0/0 and fa0/1 with their own public facing IP addresses with crypto maps associated to each interface however can only establish connectivity to one interface at any one time.
Relevent configuration below:
crypto isakmp policy 2
encr 3des
hash md5
authentication pre-share
group 2
lifetime 28800
[code]....
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Feb 22, 2011
I am trying to setup a L2L IPSec VPN between cisco VPN3020 concentrator and Cisco 2811 something is not working and I don't understand why.I describe my situation in detail my router has 2 interfaces
External interface Fa 0/1 ip 193.P.Q.R
Internal interface Fa 0/0 141.G.H.254
Lan on internal interface is 141.G.H.0/24
remote VPN concentrator has 2 interfaces
Public interface 131.A.B.C
Private interface 131.A.I.E
I have to set up L2L so that host 141.G.H.10 can talk to host 131.A.H.D whici is behind the VPN concentrator my router config:
crypto isakmp policy 3 encr 3des hash md5 authentication pre-share group 2crypto isakmp key * address 131.A.B.C!crypto ipsec transform-set presid-set esp-3des esp-md5-hmac !crypto map presid-map 5 ipsec-isakmp set peer 131.A.B.C set transform-set presid-set match address presid!interface FastEthernet0/1 ip address 193.P.Q.R 255.255.255.252 duplex full speed 100 crypto map presid-map!interface FastEthernet0/0 ip address 141.G.H.254 255.255.255.0 duplex auto speed auto!
ip access-list extended presid permit ip host 141.G.H.10 host 131.A.H.D
ip route 0.0.0.0 0.0.0.0 193.P.Q.S
Then I configured VPN3020 accordingly creating a lan to lan profile with the proper IKE proposals ecc ecc when interesting traffic is matched by VPN acl (presid) I see this messages in the VPN concentrator logs:
57101 02/23/2011 15:49:05.310 SEV=4 IKE/119 RPT=4033 193.P.Q.R Group [193.P.Q.R]PHASE 1 COMPLETED 57102 02/23/2011 15:49:05.310 SEV=4 AUTH/22 RPT=3935 193.P.Q.R User [193.P.Q.R] Group [193.P.Q.R] connected, Session Type: IPSec/LAN-to-LAN 57104 02/23/2011 15:49:05.310 SEV=4 AUTH/84 RPT=11 LAN-to-LAN tunnel to headend device 193.P.Q.R connected 57110 02/23/2011 15:49:54.820 SEV=4 IKE/123 RPT=1093 193.P.Q.R Group [193.P.Q.R]IKE lost contact with remote peer, deleting connection (keepalive type: DPD) 57112 02/23/2011 15:49:54.820 SEV=5 IKE/194 RPT=3778 193.P.Q.R Group [193.P.Q.R]Sending IKE Delete With Reason message: Connectivity to Client Lost. 57114 02/23/2011 15:49:54.820 SEV=4 AUTH/23 RPT=14 193.P.Q.R User [193.P.Q.R] Group [193.P.Q.R] disconnected: duration: 0:00:49 57115 02/23/2011 15:49:54.820 SEV=4 AUTH/85 RPT=11 LAN-to-LAN tunnel to headend device 193.P.Q.R disconnected: duration: 0:00:49
and from router side I See this with show crypto isakmp sa
131.A.B.C 193.P.Q.R CONF_XAUTH 5 0 ACTIVE
but the status got stuck in CONF_XAUTH state and then disconnects?
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Oct 27, 2012
I'm now trying to implement a IPsec VPN network over transport mode in my simple network environment.I got two Cisco 2811 routers connected each other and each router hosts a client PC running Windows7.
I have finished the configuration on both routers and make them running over transport mode.However, as what it should be, transport mode indicates the communication between two end stations (two PCs) the client PC (install or configure something) to make the network fully works?
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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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Aug 30, 2011
setting up IPsec for a DMVPN between a 2811 and 2951s in a test lab. I have enabled IPsec on the hub (2811) but I am unable to do so on either of the 2951s. After researching, it seems that I may have the incorrect IOS for this, but I am at a loss which IOS I should be using. Currently the 2951s are on "c2951-universalk9-mz.SPA.151-2.T2.bin" and the only crypto options are(config)#crypto ?
ca Certification authority
key Long term key operations
pki Public Key components
while on the 2811 I get:
WIN-T(config)#crypto ?
ca Certification authority
call Configure Crypto Call Admission Control
ctcp Configure cTCP encapsulation
dynamic-map Specify a dynamic crypto map template
engine Enter a crypto engine configurable menu
gdoi Configure GDOI policy
[code]...
These are all hand me downs?
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Sep 10, 2012
I am lacking experience in BGP and now I am trying to figure out what should be the ideal and recommended design.
Scenario:
- Having two Internet Service Provider with two ASN
- Having one idenpendant IPv4 public address
- Having two Internet Cisco Router e.g. 2811
- Having two Cisco ASA Firewall e.g. 5510
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Apr 30, 2012
I've studied and labeled out MPLS and MPLS VPNs several times. The situation I'm presented with is a little different from most of the case studies I've seen in my MPLS books. I've attached a diagram.
We have a IPsec site to site tunnel from our main HQ router to a Cisco ASA 5510 in the core network in the colo. This allows our HQ office to reach the private sub nets in our core without using a Cisco VPN client. The problem we are running into is that this seems to be putting undue strain on the Cisco 2811. I feel like the 2811 should be able to handle it but doing any kind of upload or download through the tunnel spikes the CPU/Interrupts and makes the router CLI basically stop responding until the traffic transfer is stopped or completed. During this time, certain Cisco SCCP phones on our Broad works platform cycle while the SIP phones on the same platform are OK. We are trying to alleviate the load on the 2811 by setting up a VRF from the HQ network to the private VRF used in the Core for private sub net communication. The problem I'm having is the the HQ also has some public traffic that I do not want to include in the VRFs and would like to have it travel through the P2P circuit we have and access the internet or other public devices through the core public IP Internet routing table.
The flow would be this:
-going to a public address use the public internet routing table
-going to private address in the 10.x.x.x or 172.x.x.x - use VRF to core Private network.
This is a little different of a set up from most of the VRF VPN examples I've seen. Most of those the CE devices is completely private. This is not the case at our HQ.
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May 5, 2012
i have started managing a asa 5510 firewall which is already having 10 ipsec tunnels , the problem i am facing is they are configured as "ipsec vpn map"
i have attached sample config, i am finding it difficult to understand the parameters used in each tunnel as the configration seems bit complex to me, how it works .
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Aug 18, 2011
I have a asa and Cisco 2811, needs to build a site-to-site ip sec tunnel between them. Due to a requirement need to encrypt inside traffic, i need to apply on the inside interfaces on both devices to build the tunnel.
I don't see a problem but just want to check if it would work on terminating on Inside interfaces on both ip sec peers.
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Mar 10, 2011
I need to create a IPSec Site-Site VPN in the Single mode firewall. Is it possible to create the tunnel. I have ASA 5510 Security Plus with Ver 8.3
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May 12, 2011
We're in the process of setting up an ASA 5510 as our main VPN appliance.
The Outside interface of the 5510 faces our DMZ, the Inside interface sits on our main network. The 5510 uses radius for authentication going to a server on the same subnet for the authentication. That works fine. VPN client can connect to the 5510 and successfully authenticate. Routes are pass through to the VPN client, no problem. PC with VPN client can access internet (which is by design, it should use it's own internet connection), but cannot ping/access/trace over the tunnel at all.
My hunch is that this is a nat issue - but I am confused as to how the NAT should be configured - I've tried several configurations with no luck.
The VPN client is set to pull an ip address from the pool - 192.168.56.10 - 100. The 5510 is sitting on a separate subnet (50.x/22). This seems to work on the Cisco 1700 that it will be replacing just fine. I mirrored routes and ACLs as well onto the new 5510. No luck. Client connects, authenticates, pulls an IP address and routes, but can't see anything on the inside of the 5510.
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May 17, 2012
I have an ASA 5510 running 8.4(2) which has a site to site IPSec VPN to a 3rd party who run some form of Checkpoint. The VPN establishes and allows access to a server in our DMZ on all ports that we have tested (so far HTTP, SSL, RDP, FTP) except for SQL which doesn't even seem to reach the server. I've got Wireshark running on the DMZ server and if the 3rd party initiates a TCP conversation from their server on any of the working ports to the server I see all of the expected packets arrive with the correct IPs etc (no NAT takes place across the VPN) but when an ODBC client attempts to query the SQL server on our DMZ box the packets do not arrive at the server. What I can see is the RX byte count on the VPN increasing each time the query is run but definitely no SQL arriving at the server.
Also if I revert the ASA back to the old PIX it has replaced with the same VPN config but on version 7.x then it works just fine.
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Aug 6, 2012
We have an ASA 5510 running 8.3 that we need to use to terminate a LAN to LAN IPSEC VPN.
Problem is we only have one public address available so have had to configure the link between the ASA and the Internet Router on private addresses.
Is it possible to NAT the public address to the inside or outside interface of the ASA and terminate the VPN on that interface?
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Aug 31, 2011
I have been given the following details by a company for us to connec to their IPsec VPN.
IP Address 200.9.21.214
VPN Device Description Cisco ASA
VPN Device Version 5510
Encryption Domain 10.152.24.10
Authentication Method Pre Shared Key
Encryption Scheme IKE
[code]....
I was going to use VPNC with linux but the company said they do not use remote access. So I tried a draytek vigor 3300v, that as well did not work. Had very bad logging so i couldn't troubleshoot.In the end I have decided to buy the cheapest cisco device that will allow me to connect to this.
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Nov 13, 2012
I have an ASA 5510 running ver 8.0(2) that has (4) Ipsec tunnels going from it to various other locations. I am having an issue with data transfer speed on only one of the Tunnels. This tunnel is between the 5510 and the 5555, on that link I am getting a dat transfer rate of a little over 120k a second, whereas if I pull the same set of files from another location I am seeing a transfer rate of 5m per second.
I have verified that it is not a capacity issue on the Internet bandwidth on both locations, and I can pull the same data from the same location to various other locations via Ipsec tunnels, I am only having an issue with a specific tunnel going from the 5510 to the 5555.
Since it is not affecting other tunnels on the 5510 nor is it affecting tunnels on the 5555 going to other locations, I am leaning toward a routing issue within the ISP? I will say the ISP is taking me a long way around to stay in the same Metropolitan area.
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Jun 8, 2011
i've an Cisco ASA 5510 with Security Appliance Software Version 8.0(2), in this ASA i've many L2L tunnels to this ASA, anda sometims new tunnels can't connect, the older tunnels still ok and working, yesterday this situation occured again and i've tried to clear all ipsec tunnels and try to reconnect again no one cames up again. At the time of this situation memory usage was about 78% and CPU is was around 5%. I've made a reload without changes and the situation returns to the normality.
At the time of the fail i've collect the outpu from debug crypto isakmp 255, the outpu was in the annexed file.
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Jul 16, 2012
We have built IPSEC VPN over MPLS P2P circuit between Head & Branch office using Cisco ASA 5510. Client systems at Branch office connects to Citrix app at Head office, but it gets disconnect intermittently for all user. if any recommendations/changes required for Citrix App whn passing over IPSEC VPN/ ASA.
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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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Jan 18, 2012
I am trying to pass Traffic thru the IPSEC tunnel but it does not work ([Cisco Router 892] <---> [Cisco ASA 5510] <---> [Cisco Router 892]) The Cisco ASA 5510 doesn't pass traffic UDP=500 & UDP=4500 ports...
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Aug 17, 2011
Attached are the configuration files for the devices in question. I have a 5510 that belongs to my company and a 5505 that belongs to another company. The 5505 sits behind the 5510 and is able to connect to the Internet. My thought was that VPN access should be a trivial pursuit. I was planning on just giving the admin at the remote office the public IP address that's natted to the 5505 and all would be good.
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Oct 11, 2009
WRVS4400N Version V2.0.0.7.I have been attempting for weeks to connect an IPSEC tunnel between a Cisco ASA 5510 Version 8.0(2) and a WRVS4400N . Phase one seems connect okay, where as phase two always give me the errors below. This as far as I have got, I tried disabling keep alive monitor, the device never attempted phase 2. I have read endless documentation on both devices and tried almost every combination of setting that I am aware of. The best case scenario answer would be detailed steps on how to setup the IPSEC VPN (linksys) & the site to site VPN (CISCO) as I cannot find any reference material for this combination .
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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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Feb 14, 2012
I'm trying to connect two operlapping networks via IPsec.
Details:Site_A use ASA 5510 with software version 8.0(4)32. Site_A use 10.100.0.0/24, 10.100.1.0/24 and 10.100.2.0/24 inside networks. 10.100.0.0/24 is directly connected to ASA (as vlan10), 10.100.1.0/24 and 10.100.2.0/24 are routed.Site_B use Linux box and networks 10.100.1.0/24, 10.100.2.0/24, 10.100.3.0/24 and so on (basically 10.100.x.0/24). I didn't set up this ASA, we took over this infrastructure without any documentation whatsoever.
According to link posted above I should use dual NAT. Site_B will see networks in Site_A as 10.26.0.0/22, and Site_A will see networks in Site_B as 10.25.0.0/24. Site_A is allowed to access only 10.100.1.0/24 in Site_B, and Site_B is allowed to access all 10.100.x.0/24 networks in Site_A - hence /22 mask in 10.26.0.0/22. I'd like to, for example, ssh from host in Site_B to host in Site_A using 10.26.1.222 as destination ip address (and it should be translated to 10.100.1.222 on the Site_A side). I'm looking for something like ip nat type match-host in Cisco routers - I want to translate only network part of the address an leave the host part intact. Anyway, following the steps from the link posted above everything is ok till the command:
static (companyname,outside) 10.26.0.0 access-list fake_nat_outbound
which results in:
WARNING: real-address conflict with existing static
TCP companyname:10.100.0.6/443 to outside:x.x.x.178/443 netmask 255.255.255.255
WARNING: real-address conflict with existing static
TCP companyname:10.100.0.20/25 to outside:x.x.x.178/25 netmask 255.255.255.255
WARNING: real-address conflict with existing static
[code]...
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Mar 5, 2012
I'm attempting to debug an ipsec tunnel on an ASA 5510 (8.4(3)) and when I turn on `debug crypto ipsec` and then execute `logging monitor` I get an constant stream of TCP debugging events, is it possible to only view ipsec messages?
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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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Jan 23, 2012
im lookin to establish a a multiple L2L ips tunnels ( one tunnel for each subnet) from my cisco asa 5510 to the same destination. should the cisco asa capable of this ?
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