Cisco Firewall :: ASA 5520 - IPSec Tunnel Without Private Network

Apr 11, 2013

I'm trying to achieve a site-to-site ipsec tunnel to a Cisco ASA 5520.  Most examples feature the ASA with a public interface that terminates the tuennel and a private network on another interface that the tunnel interacts with.  Where my scenario differs is that the interface that accepts the tunnel is part of a public /29 network where I want the remaining hosts on that subnet to be able to route thrugh to the other end of the tunnel.  My tunnel gets established, but any attempts to route via the IP assigned to that one interface result in the ASA rejecting traffic. If so, what configuration options should I consider?

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Cisco Firewall :: Command To Check IPSEC Tunnel On ASA 5520?

Jan 7, 2013

Need to check how many tunnels IPSEC are running over ASA 5520.Tried commands which we use on Routers no luck?

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Cisco VPN :: ASA 5520 - IPSEC Tunnel / Error When Ping Protected Network

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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Cisco WAN :: 871 / 5520 - L2L IPSec Tunnel Between Two Routers

Apr 4, 2011

Here is the situation: A CISCO871 router is configured to establish an IP SEC tunnel with a CISCO ASA5520. The configuration is OK about that. I wish to configure the same CISCO871 in order to establish a LAN-to-LAN IP sec Tunnel with another CISCO871 at the same time in order to reach private network. So, I have followed the Cisco procedure Document ID: 71462 "LAN-to-LAN IP sec Tunnel Between Two Routers Configuration Example"; it works, I can reach the peer private network BUT ONLY when the IP SEC tunnel with ASA is not established.
 
It seems to be a routing problem...I don't find how to configure to make both tunnels up and functional at the same time.

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Cisco VPN :: 5520 - Monitoring IPSec Tunnel Bandwidth Utilization

Sep 8, 2011

We have a Cisco ASA 5520 supporting multiple VPNs - both remote-access  and Lan-to-Lan.  We would like to monitor the bandwidth utilization of the IPSec Lan-to-Lan tunnels.

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Cisco Firewall :: 5520 - Two Private To One Public Email NAT Going

Nov 8, 2011

How to setup this Nat on an ASA 5520 running 8.3.2 code? I know this must be possible as I can do the same thing on my Check Point with no issues. I need to Nat two dmz mail servers to one public mx record. I will have an F5 to load balance inbound and outbound traffic from the mail servers. So I need to Nat two private IP’s to one public.

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Cisco VPN :: Establish Site To Site IPSec Tunnel Between ASA 5520 And 3030?

Feb 17, 2013

We have configured a site to site tunnel from our ASA to another organizations Cisco 3030.  It appears to have just one way initiation.  We can do a ping to a device on the remote site and it will ping just fine.  however, when the tunnel needs to be initiated from the remote site, it will not work until we have initiated the tunnel and then everything works.
 
I continue to see Error processing payload: Payload ID: 1 errors on the ASDM logs.It appears that all the configuration is in place because we can in fact establish the IPSec tunnel unidirectional.  And once established, traffic can flow bidirectional.

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Cisco Firewall :: 5540 - Multicast Over Lan To Lan Ipsec Tunnel

May 3, 2011

I need to configure multicast between 2 Csico 5540's lan to lan ipsec tunnel for a Voip application.

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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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Cisco Firewall :: Can Configure Two IPsec Tunnel In ASA5525X / When Destination Is Same

Sep 7, 2012

Can I configure two IPsec tunnel in a ASA5525X, when the destination is same.

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Cisco Firewall :: PIX515 / 2821 / 2921 / Getting GRE IPsec Tunnel Setup?

Apr 18, 2013

We are setting up an old office building as an offsite data center. The network cosists on a PIX 501 firewall and a 2811 router.  I am attempting to setup a GRE tunnel over IPsec back to the main office.  The main office consists of a PIX515, a 2821 router, and a 2921 router.  
 
There is also an ASA5510 in our main office that is used as our primary connection for all of our external services and as a GRE endpoint for our other offices.  The PIX515 is used to connect our main office clients to the internet and we would like traffic between it and our offsite data center to go across it as well.   The default route is to use the ASA.   We used policy based routing on the 2821 and 2921 routers to direct the appropriate traffic to the PIX515.  Right now I am not able to get the tunnel setup.  It appears that the offsite datacenter is sending packets but is not receiving any when I issue the “show crypto ipsec sa” commands on both firewalls.  I will show the output of that command below. 
 
Main Office The external address     198.40.227.50. The loopback address   10.254.10.6 The tunnel address        10.2.60.1
 Offsite Datacenter The external address     198.40.254.178 The loopback address   10.254.60.6 The tunnel address        10.2.60.2
 
The main office PIX515 Config :

PIX Version 7.2(2)
!
interface Ethernet0
mac-address 5475.d0ba.5012
nameif outside
security-level 0
ip address 198.40.227.50 255.255.255.240

[code]....

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Cisco Firewall :: ASA 5520 VPN Tunnel Up But Not Traffic

Nov 1, 2012

We just migrated from a single 5510 to a dual (failover)  5520, It seems that everything is working except the remote VPN. We can establish a tunnel and authenticate as local users, (going to LDAP when all is working) but no traffic is passing. I know I am overlooking something but cant see it. [code]

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Cisco Firewall :: ASA 5540 - IPSec Tunnel / ASA Refuses To Encrypt Traffic But Decrypts It

May 31, 2012

This has to be the most weirdest issue I have seen since the past year on my ASA. I have an ASA 5540 running the 8.4(2) code without any issues until I stumbled upon this problem last week and I have spent sleepless nights with no resolution! So, take a deep breath and here is a brief description of my setup and the problem:
 
A Simple IPSEC tunnel between my ASA 5540 8.4(2) and a Juniper SSG 140 screen OS 6.3.0r9.0(route based VPN)
 
The tunnel comes up without any issues but the ASA refuses to encrypt the traffic but decrypts it with GLORY! below are some debug outputs, show outputs and a packet tracer output which also has an explanation of my WEIRD NAT issue:  

My setup - ( I wont get into the tunnel encryption details as my tunnel negotiations are **** perfect and comes up right off the bat when the ASA is configured as answer only)
 
CISCO ASA - IPSec networking details
LOCAL NETWORK - 10.2.4.0/28
REMOTE NETWORK - 192.168.171.8/32
JUNIPER SSG 140 - IPSec networking details
PROXY ID: LOCAL NETWORK - 192.168.171.8/32
REMOTE NETWORK - 10.2.4.0/28 
HOST NAME# sh cry ipsec sa peer <JUNIPER SSG PEER>
peer address: <JUNIPER SSG PEER>
[code]... 

As you can see, there is no echo reply packet at all as the packet is not being encapsulated while it is being sent back. I have been going mad with this. Also, this is a live production multi tenant firewall with no issues at all apart from this ****** ip sec tunnel to a juniper!!

Also, the 192.168.10.0/24 is another IP Sec tunnel remote network to this 10.2.4.0/28 network and this IP SEC tunnel has a similar Juniper SSG 140 screen os 6.3.0r9.0 at the remote end and this woks like a charm without any issues, but the 171 is not being encrypted by the ASA at all.

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Cisco Routers :: RVS4000 - IPSec VPN Tunnel / Cannot Ping From One Network To Other

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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Cisco Firewall :: ASA 5520 8.3 VPN Tunnel Drops Traffic

Aug 23, 2011

We have a 100 Mbps WAN circuit, we have configured an IPsec tunnel between ASA 5520 and Cisco 3845 Router for our DR site replication via Veeam Backup and Replication, it was working fine before, when we established the 3DES tunnel the traffic for certain subnets is dropped after an hour and it stops the replication, although tunnel remains up and we can access the other subnets, as soon as we clear the crypto SA and ISAKMP sessions on the firewall the traffic starts flowing again and then after an hour the traffic is dropped again.So far the testing and differnet configurations we tried are as under.
 
Tried with a different MTU size both on firewall and ESXi servers but nothing happened.Their is no QOS configuration.Checked the utilization on both ends its Noram although their are subsequent 100% spikes on Cisco 3845 but on average it remians at 30-40%.

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Cisco Firewall :: 5520 - VPN Tunnel Not Working Properly?

Jan 11, 2012

I am getting the below  messages in my cisco asa 5520, during this time tunnel is down. just what to check whether the problem is at remote FW or with asa

[code]...

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Cisco Firewall :: 5520 - Remote Access VPN Through A Tunnel?

Oct 17, 2011

I have a site to site VPN between SiteA to SiteB which is working fine. SiteA has an ASA5520 and SiteB Pix501. The ASA5520 is running version 804 with split tunneling. Users connect to SiteA using remote access VPN. Is it possible to setup SiteA ASA5520 so that when users connect to SiteA they can access servers located on SiteB through the tunnel? I know i can setup the Pix501 for remote access VPN but it is located in another country and i don't want to take a chance just incase i lose connectivity.

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Cisco Firewall :: 5520 - SSH Socks Tunnel Set Up On Server

Jul 18, 2012

I have the following setup 
|| Socks Server || >> Switch1 >> ||Cisco 5520 ASA || -->> | Switch 2| -->> Clients
 
I have a SSH SOCKS tunnel set up on the socks server which is a Linux box. When I connect my machine to the switch 2, I am NOT able to receive and mail by setting up a mail client and it seems SOCKS traffic does not reach the socks server. I can however run a telnet command on port 1080 (socks port) which connects  which shows that the port was going through and open. However there was no SOCKS traffic. When I connected the machine to Switch 1, SOCKS traffic worked as expected and I was able to receive mail.

This suggests to me that the ASA has some inherent rule that does not allow SOCKS traffic. IS this true and if so how can I bypass this?

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Cisco Firewall :: Asa 5520 No Ipsec Involved With Office 3

Mar 2, 2013

I have two ASA 5520 units, both running version 8.3(2) code.  Among many other uses, they have an IPSec tunnel between them to link office 1 and office 3 together.  Office 2 does exist, and is connected to a different port on the ASA in office 3; there is no IPSec involved with office 3.

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Cisco VPN :: 5520 - How Much Traffic Pass Through Into IPSec In ASA Firewall

Mar 20, 2013

How can I see the quantity of traffic that is passing through into an IPSec VPN in a ASA 5520.

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Cisco Firewall :: Setup Of IPSec Passthrough On ASA 5520

Mar 28, 2012

I am working on IPSec Passthrough on an ASA 5520, with version 8.3, and ASDM 6.3. Currently I have a requirement for users in my internal network (10.10.249.128 / 25) to be able to connect to external IPSec VPN servers.
 
So I created a network object with 10.10.249.128 / 25, and used dynamic PAT to translate the source ip address to the external internet facing outside interface:

I then added the following rules on the inside-in ACL: However troubleshooting shows that isakmp is passing through the firewall, but esp and ah is not.
 
For isakmp:
 
For ESP:Seems like the nat rule is drawing my ESP traffic,

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Cisco Firewall :: Mask DMZ Servers From Private Servers And LAN ASA 5520

Jun 11, 2013

We are planning to split the Private servers from the DMZ Servers and configure an additional Interface and segment for this purpose.
 
Private Servers Segment: 192.168.4.0/24 (there is no DHCP all servers' IPs are statically configured)
DMZ Segment: 192.168.3.0/24 (This is a future deployment)
LAN Segment: 172.17.0.0/16
 
Both, Private Servers and DMZ Servers are in a collocation as well as the ASA5520. There are multiple Branch offices that uses subnets within the 172.17.0.0/16 Network and they are connected to the ASA5520 via Metro-E.
 
I do not know if this is possible but what I want to do is this:
 
In order to avoid the change of internal DNS records I want to mask the DMZ servers with a Private Server IP when a Private server or LAN host wants to access it like this:
 
The FTP server in the DMZ has the IP address: 192.168.3.100. But when a PC from the LAN wants to reach the FTP server it should points to its old IP: 192.168.4.100. This way the PC sends a packet to the ftp.corporate.net (192.168.4.100) the ASA recieves the packet and translate it to the (192.168.3.100) and send it out through the DMZ Interface.
 
Also if the Private Servers wants to reach the same FTP the ASA will act like a proxy-ARP and send the paquet to the DMZ by means of the translation of the IP.

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Cisco VPN :: Monitor Tunnel That Has End Devices ASA 5520 And NetScreen Firewall?

Dec 27, 2011

Monitor a VPN tunnel that has as end devices a Cisco ASA 5520 and a NetScreen Firewall. I'll like to be receive an alert when the VPN is down.

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Cisco Firewall :: 5520 - Restrict Remote IPSec Vpn From Company Pcs Only?

Aug 19, 2012

we wish to implement IPSec remote access vpn with the condition that employees should be able connect to this vpn only from company issued laptops and not from any other computers. I assume using client side certs is one of the ways to do it but I couldn't find any doc that was really useful. Cisco's documentation seems quite obscure. We are on 8.1 (5520)

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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 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

[Code].....

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Cisco VPN :: 3000 Network Address Is Allowed Down Tunnel / Check Phase 2 IPSEC Proposal

Nov 4, 2012

I need to check and possibly change which Network address is allowed down a tunnel and check our Phase 2 IPSEC proposal. How would I do this on a VPN3000?

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Cisco VPN :: Site To Site VPN IPSEC Tunnel From ASA 5505 To Clavister Firewall

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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Firewall Is Deep Inside Private Network PIX515

Jan 7, 2011

I am having a spot of bother with a Cisco PIX515, I have posted the current running config below, now I am no cisco expert by any means although I can do basic stuff with them, now I am having trouble with traffic sent from the outside to address: 10.75.32.25 it just doesn't appear to be going anywhere.

Now this firewall is deep inside a private network, with an upstream firewall that we don't manage. I have spoken to the people that look after that firewall and they say they they have traffic routing to 10.75.32.21 and 10.75.32.25 and thats it (although there is a website that runs from the server 172.16.102.5 which (if my understanding is correct) gets traffic via 10.75.32.23. [code]

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Cisco VPN :: Private-to-Public IP NAT Through IPSEC VPN On 3000 Concentrator

Jul 27, 2011

We have to setup an IPSEC tunnel for a client that does not what to exchange private IP address information for security and overlapping address space reasons.  We will both be natting our source private ip address space as public IP address space and send those packets through the established tunnel.  Im using a Cisco 3000 concentrator. 

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Cisco Firewall :: Upgrade From 5505 To 5520 On Network - ASA Firewall Throughput

Feb 27, 2013

I'd like to see some REAL LIFE comparisons of ASA firewall throughput (a bit like this one for ISR G2 Routers - [URL].
 
The reason I ask is that I recently upgraded a firewall from an ASA5505 to an ASA5520 on a small network where the only outside connectivity was a single 10meg Internet circuit with an IPSEC VPN (not landed on the firewall but on a router) to another site.
 
When I swapped out the firewall the users noticed a big improvement. The firewall is not doing anything out of the ordinary - no IPS or VPN, just standard state full inspection.

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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 :: 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 1.1.1.1

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

[Code]......

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