Cisco VPN :: ASA 5505 - NAT Before Going Over VPN Tunnel
Feb 7, 2013
We're setting up a site to site VPN with a customer. Our side is a Cisco sa520 and there side is a Checkpoint. The tunnel is up, we've verified phase 1 and 2 are good. The issue is passing traffic across the tunnel, our LAN ip address are private addresses 10.10.1.0/24 but the customer states that we need to have a public IP address for our LAN in order to access there server on there LAN. So looking through all the forums, I see that you can NAT before crossing the VPN tunnel, but our issue is that our site only has 6 IP addresses assigned to it and those are the Comcast router, the WAN side of the SA520 firewall.
So we were wondering was there a way that we can either use the WAN interface on the SA520 or use another available of the 6 that were assigned to NAT and pass traffic across the tunnel. Sounds confusing? sorry but it is, rarely do I have a customer say I have to have a public IP for my side of the LAN. Now I also say this is a SA520 firewall, but if it's not possible to do with that is there a way were could with an ASA5505?
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May 11, 2011
i got a person who connect with vpn on a adsl connection to the corporate network.this person is using cisco ip phone on his remote location and i did configure the ASA 5505 to priorize voice over data.i still get voice skips when the remote pc is uploading data to the corporate network...what i've done is :
1.with asdm i did create 2 priority queues one for inside (queue limit 2048 trans ring limit 512) and outside (queue limit 2048 trans limit 256)
2. with the service policy wizard i did create a global service policy (all interface) and a traffic class for dscp 46 ef and on qos tab i did check the "enable priority for this flow"...
3. When using the phone, i clearly see that packets are growing on the LLQ queue (show priority-queue statistics)
4. i still get voice skips when uploading data to the corporate network... upload bandwidth is about 800k for upload the pc and the phone is on the same subnet
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Jun 5, 2011
I finally got the VPN tunnel between 2 asa 5505's up and running, but I have some error codes on the initiator side that I can not figure out. [code]I have looked at the Crypto transforms on both sides, and they match just fine as far has the DH ID code, Group Number and the encryption. The remote side however, does not have any of there errors.
Is this something that I have skipped over, or missed that I should be looking for? The IP address that is listed above is not in my static addresses, not sure where theose are coming from. I believe that they are outside public IP's.
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Mar 2, 2012
I updated the configuration per your response below... It still doesn't work. See my new config files below.
make follow changes on host: officeasa
remove this line below highlighted.
crypto dynamic-map L2LMap 1 match address Crypto_L2L
It is only because group1 is weak, so please change it to group2
crypto dynamic-map L2LMap 1 set pfs group1
route outside 10.10.6.0 255.255.255.0 96.xxx.xxx.117
[code].....
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Aug 12, 2011
I have an interesting SVPN challenge that I'm asking the subject experts here to assist me in solving.A customer in Domain A wants to transmit data to Domain B. The customers have agreed to establishing a secure vpn connection from Domain A to Domain B to transmit real time data. The challenge comes from sending unencrypted data from nodeA to nodeB & nodeC withing an encrypted VPN tunned to node d.The challenge is sending non-encrypted data from NodeA to NodeB where an encrypted VPN session is active. Every time I attempt to configure the interface (AppC) the VPN session is terminated, and the interface can no longer "see" nodeD via IP mapping. An engineer recommended adding a second NIC card to NodeB thereby permitting control of the AppC even when the VPN is up and running.Can I send live non-encrypted data to NodeB data buffer, while AppC sends data to NodeD in a VPN tunnel ?
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Oct 25, 2012
Having a strange issue with RDP to a XP machine through a L2L tunnel.Tunnel is between an ASA5505 and ASA5510. Site A 5510, Site B 5505 I have a handful of Win7 and XP Dev machines running on ESXi 4.1 within Site A.Site B to Site A I can RDP to all Server 2008 and W7 machines(physical and virtual).I can also RDP to a physical XP machine.I can ping the XP VMs by name and IP successfully.I cannot RDP to the 5 XP VMs running on the ESXi 4.1 host Site A to Site B I can RDP from the XP VMs on the ESXi 4.1 host to any machine within Site B.Within Site A I can RDP to these XP VMs AnyConnect I can AnyConnect into Site A and RDP to the XP VMs I have tried to Telnet on 3389 to the XP VMs with no success.
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May 25, 2011
I have set up two ASA 5505's (lets call them ASA1 and ASA2) with site to site VPN configuration and i've encountered two problems with my setup.ASA1 has IP 192.168.1.254 on the inside interface and is connects ASA2. It's also an Easy VPN Server for external users to connect through Easy VPN Client.ASA2 has IP 192.168.11.1 on the inside interface and connects to ASA1 Problem #1 None of the ASA's can ping eachothers inside LAN IP address. Computers behind the ASA's are unable to ping the remote ASA's inside IP address. My guess is that this has to do with either NAT or built in security.Problem #2. The Easy VPN clients which connects to ASA1 are unable to access the LAN behind ASA2.
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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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Dec 5, 2010
I've a asa 5510 on the main site and different ASA 5505 on secundary sites for VPN tunneling between the sites. The problem is that the tunnels are acomplished but no traffic is going over them. What am i doing wrong? For the moment there is a ASA 5505 on the main site managing the tunnels but I want the 5510 to take over the job.
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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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Jul 3, 2011
I have a ASA 5505 VPN Concentrator using ADSM 5.2 connecting to a BEFSX41 router. Its a pretty simple set up that has been working for years. However, over the past several weeks the VPN tunnel is consistently dropping every day or two, however both side are able to ping the internet at all times. My current work around is to manually log into the BEFSX41 router and re-connect the VPN tunnel, which simply connects immediately. The tunnel will stay up for about a day or two until it reliably drops the tunnel connection. Every time the tunnel drops I get an alert with an error message: [code] After doing searches about what this error means, all I can find is that its supposed to mean there is a problem with the encryption keys. I have checked the keys many times over and everything is the same. I find it odd that nothing has changed in almost 2 years.
I have 10 other VPN connections that are always up at never have any problems. I have the same make/model router connected to other offices with no problems. I have swapped the router twice, and each time I get the same symptoms.
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Feb 4, 2013
Two 5505 ASA's for a customer main site and a local office. I have the tunnel up. But I'm unable to pass traffic across it.
Main Site:
ASA Version 7.2(4)
!
hostname Town
enable password iNbSyJZ1ffmb9kn1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
[code]....
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May 27, 2011
I have two cisco ASA 5505 devices and two cisco switches plugged to ASAs in each office. I need to create a VPN tunnel between two offices.
-Network behind the ASA1 in office1 is 192.168.1.0/24 with DHCP server – 192.168.1.10
-Networks behind the ASA2 in office2 are 192.168.5.0/25; 192.168.5.128/26 and 192.168.5.192/26
All computers in office2 need to get IPs from DHCP server 192.168.1.10. I have switch in office2 with 3 VLANS and I can assign computers from different subnets to different VLANs.How can I archive this goal? Should I assign 3 IPs for ASA2 inside interface (192.168.5.1, ...5.129, ...5.193) as a default gateways for each subnet? Should I put dhcp helper address 192.168.1.10 on the switch for each VLAN?
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Mar 19, 2011
I have a Site to Site IPSEC VPN Tunnel created with ASDM wizard.
Cisco ASA-5505
Peer A: x.x.x.x
Lan A: 192.168.0.0 255.255.255.0
Fortinet FortiGate-50b
Peer B: y.y.y.y
Lan B: 192.168.23.0 255.255.255.0
I start traffic from LAN B with a ping (or telnet it doesn't matter) that receive no reply but tunnel goes up fine.
"show isakmp sa" seems ok (says "State : MM_ACTIVE")
"show ipsec sa" seems ok but all #pkts are zero
try ftp, telnet from LAN B to LAN A systems but no one work. "show ipsec sa" all #pkts are zero As soon as I generate traffic from LAN A to LAN B these works (with tunnel already up) also traffic from LAN B to LAN A works.Obviously if I end VPN and start tunnel making traffic from LAN A all work fine bidirectionally, LAN A reach LAN B and LAN B reach LAN A.No msg logged in either two appliance.
Seems a very strange problem because seems not related to Phase1 or Phase2 already established.Traffic (routing ?) start works only after at least one packet goes from LAN A to LAN B.No msg logged in either two appliance.Problems begun in ASA version 8.0(4) ASDM version 6.1(3) and remain/continue after upgrade to ASA Version 8.4(1) ASDM version 6.4(1).
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Jun 6, 2012
I upgraded an ASA 5505 from 8.3(2) to 8.4(4) this evening. The 5505 is a backup and used to perform testing prior to production changes. After the upgrade was complete, a VPN tunnel began to fail. I did a limited search online to see if this was a known issue or something new. I also reviewed the release notes but did not see anything that matched the issue I received.
My concern is that this tunnel configuration is scheduled to be deployed to the production firewalls next week after their upgrade. But if it failed on the upgraded test unit, it may fail on the production units.
I downgraded the backup unit to 8.3(1) and verified that the tunnel indeed worked at that level.
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Feb 10, 2011
Having a problem getting an ipsec tunnel to work between 2 asa 5505. This in one of the two configs.
Result of the command: "show run"
: Saved:ASA Version 8.3(2) !hostname 20Pullmandomain-name skeincenable password IKxxneNMTRgDw/Xd encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Vlan1nameif insidesecurity-level 100ip address 172.16.1.70 255.255.255.0 !interface Vlan2nameif outsidesecurity-level 0ip [Code]...
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Jun 19, 2012
I have 2 ipsec tunnel active on ASA5505 (secplus license).I would like to activate sslvpn also. Is it possible or there are issues in keeping active both services?
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Mar 17, 2011
We have a VPN setup and here's the configuration on the Cisco ASA 5505: [code] The problem is that i'm able to ping the otherside of the tunnel i.e. 192.168.23.14 from the dmz IP 172.16.1.2 but i'm unable to ping from the hosts behind the ASA.Also the other side is able to ping 172.16.1.2 IP but no IP's behind the ASA.
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Mar 27, 2008
I am trying to monitor my ASA 5505. This asa is connect via a ip-sec tunnel to our network. I have no problems with snmp monitoring devices behind the ASA, but when trying to monitor the asa itself I do not get a SNMP response.
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Apr 18, 2011
I have asa 5505 configured with smart tunnel for mstsc.exe only. It work fine only if I use IP address of Terminal Server(192.168.1.1 for example) in Terminal Client(mstsc). But it does not not work if I try to use fqdn of Terminal Server (servername.domain.name for example). Is it possible to use mstsc.exe with smart tunnel with FQDN of Terminal Server?
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Jul 18, 2011
I currently have two Cisco ASA 5505. They are at different physical sites (SITE A, SITE B) and are configured with a site-to-site VPN which is active and working.
I can communicate with the subnets on either site from the other and both are connected to the internet, however I need to ensure that all the traffic at my site B goes through this VPN to my site A.
I changed this access-list : access-list outside_2_cryptomap extended permit ip network_siteB network_siteA to access-list outside_2_cryptomap extended permit ip network_siteB any
But this does not work. If I do [URL], site B IP address is not same that site A.
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Jun 3, 2012
I am trying to confgure a L2L VPN tunnel to a service provider using an ASA 5505.My problem is that the service provider will not accept traffic from a LAN subnet, they will only accept traffice from a public IP.We have a small public subnet of x.x.x.50/255.255.255.248, our public IP (outside interface IP on the ASA 5505) is x.x.x.50 and the service provider wants to see traffic coming from us on x.x.x.51How can I NAT our LAN subnet (10.0.0.0/24) to one public IP (x.x.x.51)?
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Feb 24, 2011
I am trying to set up a LAN-to-LAN VPN tunnel between two sites. One site has a 5505, and the other site has a 5510. It looks like the tunnel is being established fine (both ISAKMP and IPSEC SAs look OK), but traffic doesn't appear to be routing across the internet between the devices. [code]
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Jan 30, 2012
We have a new site-to-site configuration comprised of two ASAs (a 5505 at the remote site and a 5510 locally). The site-to-site tunnel is up and appears to be working fine, with the exception of one thing; two identified IP addresses on the remote end cannot seem to communicate across the tunnel.
For example: address 192.168.3.81 is able to see resources at our facility, but 192.168.3.82 (an HP Laser jet P2055dn) cannot. However, 192.168.3.82 is ping able from the inside interface of the remote ASA and doesn't appear to be having any other connectivity issues. Also, the default gateway of this device appears to be set properly. When checking the real-time log viewer, I'm not seeing any error messages, it just appears as if the .82 device is not routing to the remote ASA, but strangely enough the local ASA's logs do seem to show communication with .82. (See the below logs.)
When we attempt to ping the 192.168.3.82 address from a local PC (10.10.10.10) that participates in the VPN tunnel, we see the following:
Local ASA
6|Jan 31 2012|16:03:53|302021|192.168.3.82|0|10.10.10.10|512|Teardown ICMP connection for faddr 192.168.3.82/0 gaddr 10.10.10.10/512 laddr 10.10.10.10/512
[ code]....
Remote ASA
6|Jan 31 2012|16:03:53|302021|10.10.10.10|512|192.168.3.82|0|Tear down ICMP connection for faddr 10.10.10.10/512 gaddr 192.168.3.82/0 laddr 192.168.3.82/0
[ code].....
We can successfully ping 192.168.3.81 from the same local workstation we see the following on the remote ASA :
6|Jan 31 2012|16:03:38|302021|10.10.10.10|512|192.168.3.81|0|Tear down ICMP connection for faddr 10.10.10.10/512 gaddr 192.168.3.81/0 laddr 192.168.3.81/0
[Code]....
We have no IP address overlapping and neither ASA's logs show any errors. Unfortunately, we don't have access to the remote site's router configurations, but we've been assured that the issue is not on their end.
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Mar 16, 2013
Is it possible with ASAVPNSERVER 5520 and an EasyVPN 5505 Client to have the client do split tunnel to a single public IP address? Both devices are on 8.2(5) 33. Could you possible provide sample config for split tunnel?
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Mar 21, 2012
I'm trying to establish a VPN tunnel between our main office running a Cisco ASA 5505 [8.3(2)] and a remote user using a Cisco Small Business WRVS4400N firmware version V2.0.1.3.
The Cisco ASA 5505 is already configured to allow incoming IPSec VPN connections via the Cisco VPN Client.
Is this possible, and if so, how would I go about doing so? The remote user has a static IP address as well as the main office.
I'm trying to establish a VPN tunnel between our main office running a Cisco ASA 5505 [8.3(2)] and a remote user using a Cisco Small Business WRVS4400N firmware version V2.0.1.3.
The Cisco ASA 5505 is already configured to allow incoming IPSec VPN connections via the Cisco VPN Client. Is this possible, and if so, how would I go about doing so? The remote user has a static IP address as well as the main office.
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Oct 27, 2011
For a customer I have configured a new ASA 5505 firewall with 8.42 software. I had to build 3 ipsec tunnels to different locations and firewalls. All tunnels are working except one. I have to translate the inside network 1 to 1 to a different private range before it is sent over the tunnel. Each host from network 192.168.133.0 /24 has to be translated to a 192.168.112.0 /24 host and then sent over the tunnel. (e.g. 192.168.133.22 translated to 192.168.112.22)
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Nov 2, 2012
I have HQ side with ASA 5520 (8.4) & Branch Side with ASA 5505 Design
VPN LAN<------->ASA5520(8.4)----->Thomson Business TG628s----->Internet<--->ADSL Modem------>ASA5505(8.2)
Now on both modems UDP 500 & TCP/UDP 4500 ports are enabled I can ping from internal LAN of HQ to internal LAN of branch but I cant ping from internal LAN of branch to internal LAN of HQ
HQ ASA 5520 Side
ASA Version 8.4(3)
host name aljoaib-fw01
[ code]....
Branch side ASA 5505
ASA Version 8.2(5)
host name GTC- DMM- FIREWALL
domain-name ALJOAIB.COM
enable password 7pgp93AEPfHtDc5N encrypted
[Code]....
Both sides have static ip address.
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Jan 31, 2011
How can I configure an ASA 5505 NEM client to allow access to the Internet when the tunnel to the headend is down? I am planning on deploying back to back ASA 5505s in network extension mode but I do not want to block Internet access on the client side if the tunnel to the server should go down.
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Jan 17, 2013
we have a cisco ASA 5505 and are trying to get the following working:
vpn client (ip 192.168.75.5) - connected to Cisco ASA 5505
the client gets a specific route for an internet address (79.143.218.35 255.255.255.255 192.168.75.1 192.168.75.5 100) when i try to access the url from the client i get a syn sent with netstat when i try the packet tracer from the ASA i see the following:
<Phase>
<id>1</id>
<type>FLOW-LOOKUP</type>
<subtype></subtype>
<result>ALLOW</result>
[code].....
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Apr 30, 2012
Need to know the step by step procedure for monitoring site-to-site VPN tunnel (up/down) using SNMP on Cisco ASA 5505.
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Nov 20, 2012
I have weird problem with a Site to site VPN tunnel from a Cisco ASA 5505 to an Clavister Firewall.When I restart the Cisco ASA 5505 the tunnel is up and down,up, down, down, and I get all strange messages when I see if the tunnel is up or down with the syntax: [code]
After a while like 5-10 min the vpn site to site tunnel is up and here is the strange thing happening I have all accesslists and tunnel accesslists right I can only access one remote network (Main site Clavister Firewall) trought the vpn tunnel behind the Cisco ASA 5505, and I have 5 more remote networks that I want to access but only one remote network is working trought the vpn tunnel behind the Cisco ASA. I see that when I do this syntax in ASA: show crypto ipsec sa.They had a Clavister Firewall before on that site before and now they have a Cisco ASA 5505 and all the rules on the main site thats have the big Clavister Firewall is intact so the problems are in the Cisco ASA 5505. [code]
All these remote networks are at the Main Site Clavister Firewall.
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