Cisco VPN :: SRP527W IPSec VPN Tunnel Works One Way / Can Ping Other Direction Too
Aug 2, 2012
I have a IPSec tunnel that is working in one direction. Below is the router config from the side that can connect to the other side perfectly. I believe the issue is with this router as while I was waiting on delivery for the ASA I had an SRP527W sitting in it's place and had exactly the same problem.On one side I have a 887VA router and the other an ASA5505.The network behind the 887VA can access the remote site perfectly, backup services are traversing the link as are web interfaces for applications. In the other direction I can ping hosts but cannot connect. What else is interesting is if from the remote site I attempt to connect to a particular device that performs a port redirect the remote site browser gets so far as being redirected to port 5000 but then hangs.
I am seeing some very generic packet drop debug notices on the 887va on the NAT-ACL access list but I think this is as it should be as it is dropping the tunnel traffic from the NAT'ing.The config for the router is here, I will post the ASA config when I get to the other site shortly but I am convinced the issues is on this device, all the crypto configurations match.I have looked at the MTU's on each side, the path MTU on both sides is 1492. The asa does say the media MTU is 1500 but I believe that is the ADSL link so shouldnt matter?I even went so far as installing CCP and testing the VPN. It says the tunnel is up. It did state a failure:A ping with data size of this VPN interface MTU size and 'Do not Fragment' bit set to the other end VPN device is failing. This may happen if there is a lesser MTU network which drops the 'Do not fragment' packets. [code]
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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
broute1#
Jul 23 05:44:57.079: ISAKMP:(0):purging SA., sa=85247558, delme=85247558
broute1#
Jul 23 05:45:17.031: ISAKMP (0): received packet from XXX.XXX.XXX.XXX dport 500 sport 500 Global (N) NEW SA
[code]....
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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Jun 5, 2012
I'm very new to cisco devices but we recently acquired a catalyst 2911 device for our co-lo cabinet and I am trying to get a site-to-site vpn connection working between the facility and my offices network as well as a remote access VPN for me to use in case I have to fix something while outside of the office.
The office's gateway is 66.119.163.2 and the device is a TZ210 with it's LAN network being 192.168.1.0 /24
The co-los gateway is 204.244.50.254 and the device is an ASR 2911 with it's LAN network being 10.0.10.0 /24
The S2S VPN connection is up between the two locations and the 2911 device and the servers within it's LAN can ping and RDP to the office's machines. The office network can only ping the LAN interface IP on the 2911 which is 10.0.10.1 but not the servers in the network. the site-to-site VPN was set up with the CCP wizard.
How can I allow the 192.168.1.0/24 network to see the 10.0.10.1/24 network and why do I only currently see the gateway?
If need be I can post my running-config file with the preshare keys redacted.
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Aug 5, 2011
I have a RVS4000 at one location and a second RVS4000 at home. I have established an IPSec VPN tunnel between them and it is UP. I can ping the routers from each end no problem. I can ping the IPs listed in the "Local Group Setup" and the "Remote Group Setup" from both ends no problem. I can even open up a shared resource from a Win 7 machine (e.g. by typing \10.10.10.100 in start-run from a computer on my home network).
But - i can't ping anything else on one network from the other. What gives? I need to access a 10.10.10.101 machine but can't even ping it.
- both RVS4000 boxes have latest firmware (V1.3.3.5)
- home RVS4000 setup with IP 10.10.11.1
- home network has a server with IP 10.10.11.20
- other location RVS4000 setup with IP 10.10.10.1
- other location server setup with IP 10.10.10.100
Tunnel settings on home RVS4000 (the other location properly mirror these).
- Local Security Gateway Type : IP Only
- Local Security Group Type : Subnet
[code]....
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Nov 2, 2009
On my ASA5520 I am trying to do a IPSEC tunnel between two sites. When I ping the protected network on the other side I get this when debugging IPSEC:
IPSEC(crypto_map_check): crypt o map man map 20 does not hole match for ACL man1
Not too sure what this means...
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Mar 13, 2012
We have configure a L2L vpn between Asa and 1841 router. We are facing this issue.The tunnel is not getting up from the 1841 site never. When we are trying to generate traffic from the ASA site the tunnel is up and we can see decryps and encryps packets.
Router 1841 Config:
crypto isakmp policy 100
encr 3des
hash md5
authentication pre-share
group 2
crypto isakmp key * address 213.249.XX.XX
[code].....
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Jan 14, 2013
I have lots of 857's routers in the field with mostly the latest OS - 12.4(15)T17 making ezVPN connections to a 2951 with 15.1(4)M5.All the 857's have lookback and vlan interfaces similar to :
interface Loopback0
ip address 50.43.8.1 255.255.255.255
ip tcp adjust-mss 1452
end
[code]....
Now lately for some or other reason we have instances where I can ping either the VLAN or the LOOPBACK interface, but not both. Or I have instances where the 2951 can ping all the interfaces on the 857, but the 857 can not ping the 2951. Or I have instances where the 2951 can not ping the 857, but the 857 can ping the 2951.The way I have been fixing this is either to add crypto ipsec client ezvpn SMS_VPN inside to the loopback interface, or if it is there already to remove it. This usually works for a few days, but then suddenly I have to reverse this again. If that does not work then I usually do lots of clear crypt sess and/or clear crypt ipsec client ezvpn on the 857, or clear crypt sess remote 857_ip_address from the 2951 and then suddenly it starts working again.
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Jun 1, 2012
For the purpose of a remote backup between 2 QNAP NAS devices, I have setup a site to site VPN using 2 Cisco RV220W routers. Although VPN connects just fine, I can only access Network B from network A, but not the other way around. I believe it could be related to ip ranges/subnets.IPSec VPN connects successfully (IPSec SA Established)From network A I can connect to any device on network B (qnap smb, ssh, cisco web interface, printer, laptops, etc)From network B, I can ping any device on network A, I can access the cisco web interface from network A, and nothing else. If I try to access the web interface for the qnap on network A from a device in network B, no luck, it seems to hang. I also tried issuing a wget command from the qnap (ssh) on network B to fetch the web interface of the qnap on network A, and it says connected, but then hangs. I've tried lots of different settings (creating static routes, dynamic routes, changing subnets, etc), but without any luck.
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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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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
[Code].....
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Jan 29, 2013
We are using SRP527 routers with PPPoE ADSL connections. From the SRP527 we create an IPSec tunnel to our core routers (Cisco ASR). We are wanting to change the IPSec tunnels to L2TP, and I need to know if this can be done from the SRP527. I cannot find any L2TP configuration options in the setup options.Can the SRP527W act as an L2TP tunnel initiator over the ADSL PPPoE interface?
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Mar 23, 2013
I have setup a remote access VPN to an ASA5505
I have a directly connected server behind the ASA and I can ping the server without a problem.
The VPN client reports packets being encrypted and decrypted
However when I try to RDP to the server the encyrpted packets keep incrementing but the decrypted packets do not.
I am also not seeing any RDP traffic hit the server (verified by ethereal)
I have done a packet tracer and it suceeds but ends with an IP spoof which I believe is correct as it is vpn traffic and not actually being encrypted.
This is the debug from the RDP session, I am confused by a Denied ICMP on line 2 as I am able to ping the server?
%ASA-6-302013: Built inbound TCP connection 88193 for external:172.16.24.4/50984 (172.16.24.4/50984) to internal:192.168.100.146/3389 (192.168.100.146/3389) (roger_ssl)
%ASA-4-313004: Denied ICMP type=0, from laddr 172.16.24.4 on interface external to 192.168.100.146: no matching session
[Code].....
The only logical bit to this is flow closed by inspection? Does this mean the server has not responded?
And the decrypt packets not increasing when trying to RDP Does this mean that I have reached the end of my ASA knowledge on this one!
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Apr 3, 2011
i have a problem with a cisco 857-K9 router. We can access internet but if we ping a web server, every first ping fail but all others works...
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Aug 3, 2011
I'm inclined to think this is a bad router but just wanted to run it by everyone. All of a sudden I can't get into the router interface or ping it, but the internet still works. If I power cycle the router, then I can get back into it.
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Jan 11, 2012
I have recently made some chages to my ASA 5510 (not sure what) I was previously able to ping url... and I am now not able to ping anything on the Internet, but The Internet connectivity work perfectly.
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Aug 22, 2012
I have a ASA5520 with 4 Port channel interfaces and ASA Version 8.4.(2). There are many vlan interfaces but in the DMZ I have one Server who has a Static NAT to all other interfaces.
Why the first ping works and the others doesn´t work?
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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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Sep 11, 2011
I have the below configurations done on a 2900 router. [code]I would like to know, if the IP address assigned to dialer1 interface "20.1.2.133" would be listed in "show arp" ?, as it failed to list on our router and I want to know if this is an expected behavior ?
Secondly, does self ping 20.1.2.133 (dialer interface IP) work ? [code]
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May 4, 2011
how to create ip sec tunnel using these parameters. customer ip where tunnel has to be connected 1.1.1.1
ISAKMP Parameters: (Phase I)
Encryption: AES-256 or 3DES
Authentication Mode: Pre-shared key
[Code]......
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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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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
212.178.155.73 80.62.yyy.xxx (traffic source IP: 212.178.155.73)
[Code].....
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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 10.1.1.0/24 and i configure 10.1.1.0 0.0.0.255
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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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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.
[URL]
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 172.19.191.0 0.0.0.255 172.16.0.0 0.3.255.255deny ip 172.19.191.0 0.0.0.255 10.0.0.0 0.255.255.255deny ip 172.19.191.0 0.0.0.255 192.168.128.0
[Code].....
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Feb 25, 2012
For some reason I cannot ping or FTP on a specific computer on my home network. All other computers work fine and the specific computer works fine on other networks. But the combination of this computer and my home network it doesn't like.
I have disabled both windows firewall and my virus software but nothing seems to work. It seems to be a timeout issue as FTP and ping sometimes does work but FTP is increadibly slow when it works and the ping time is very high 670ms and above. I am running windows 7 and my router is a netgear n150
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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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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 192.168.1.0/24 and an outside LAN 10.10.0.0/24 is successfully established. Now there is a new intern "Admin"-LAN 192.168.2.0/24 at the main office. The users from the outside LAN 10.10.0.0/24 need the possibility to reach this new intern "Admin"-LAN.Can I simply route the traffic from 10.10.0.0/24 to 192.168.2.0/24 via the existing IPSec-Tunnel? Or need I a new IPSec tunnel between the outside 10.10.0.0/24 LAN and the new "Admin"-LAN 192.168.2.0/24?
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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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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 210.0.0.1.On the Inside interface, i've configured 10.240.32.0/24 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 10.240.32.0 255.255.255.0 210.0.0.1 1.I did this, but i'm not able to reach the destination 10.240.32.0/24 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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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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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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Nov 18, 2011
I configured an IPSec VPN tunnel between two ASA 5505 firewalls. I would like to make sure that the IPSec tunnel (hence the security association) is permanent and do not drop due to idle condition.
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Jun 29, 2011
I need to route traffic to DMZ (and internal) from the branch office thru the IPSec tunnel. How do I manage that with my Cisco 881?
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