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 :: 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 Firewall :: 5540 PIM Multicast Routing In ASA Scenario

Jun 19, 2011

We have an ASA-5540 (8.4(1))  The inside interface faces a few multicast receivers. The outside interface faces the multicast source.All of the ASA multicast documents I've download describe very simple network designs, such as a single segment on the ASA inside.Our PC hosts that will be multicast receivers are a couple router hops away from the ASA inside interface. I'm not sure what the best way is to configure multicast on the ASA.Should I configure the ASA with PIM routing and a static RP address (plus the ACL to allow the multicast source traffic in) since the receiver hosts are a couple hops away?  I think I understand the IGMP joins are for a local PIM router, so configuring as a Stub Multicast router wouldn't work? The two Cisco routers between the host and the inside ASA interface already have PIM, a static RP address, and IP PIM Spare-Mode configured.

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Cisco VPN :: TFTP From ASA Via Site To Site IPSEC Tunnel 5540

Nov 1, 2011

I am having issues getting my ASA 5540 at site A, to pass TFTP and SYSLOG from itself across the IPSEC tunnel to our SYSMON servers (Syslog and TFTP) that live at site B. I have followed the suggestions of other threads and I am still not getting anywhere. Here is a quick topology diagram.

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Cisco Firewall :: ASA 5540 - 3000 Simultaneous IPsec Connections

May 15, 2013

We are planning to use an ASA 5540 to terminate about 3000 IPSec connections. The maximum supported IPsec VPN Peers for this platform ist 5000, so this should be ok in theory.
 
What is a bit unclear to me is what exactly happens when (for whatever reason) all 3000 clients try to connect at once ? Perhaps it's not at once but depending on timers this could mean 3000 incoming IPsec connection within 10-20 seconds.
 
Will the the ASA cope with it ? I can't find any info regarding this on CCO. It's also not that easy to test/simulate.

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Cisco Firewall :: Is Multicast Supported On ASA 5510 For IPSec VPN Clients

Dec 6, 2011

Our customer is using multicast in their internal network for their IP video deployemnt. Internallt on the network everything is working great.
 
We have two folks in management who want to be able to view the live multicast video feeds of the cameras remotely. I have tried to accomplish this using the Cisco VPN client. Although VPN connectivity is good (we can ping the individual cameras) they are unable to view the live multicast feeds. I enabled multicast globally on the ASA and the inside interface and get the same results.
 
Is there a way for the ASA to support the remote IPSec VPN client to view the multicast strams?

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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 :: 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 :: 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 :: 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 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 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 :: 5540 Stop Split Tunnel For Only One User

Apr 18, 2013

 i have cisco asa 5540, users access vpn through anyconnect, i have applied split tunnel so that all users accessing internal network (10.0.0.0) grows through tunnel and other traffic through internet.. working fine.i want to fully tunnel one user so that all his traffic goes through the tunnel, what is the best way to do it, "is there any guide (step by step)"

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Cisco VPN :: Set Up Remote Access IPsec VPN On Pair Of ASA 5540

Feb 6, 2011

I'm trying to set up remote access IPsec VPN on a pair of ASA 5540 without much success. I can connect with a client on the outside, and when I try to ping something on the inside I can see the ping requests reach the target but the answers don't come back to the VPN client. I've tried with different NAT rules without success.

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Cisco Routers :: WRVS4400N Connecting To ASA 5540 IPSec L2L?

May 15, 2013

I have a remote WRVS4400N that has a dynamic outside address that's initiating a connection to a ASA 5540 with a static address.
 
I'm all set on the ASA side.  My questions relate to the 4400N.  It doesn't appear to have a very robust configuration/setup available for L2L tunnels.  For one my encryption is limited to 3DES.
 
But I'm wondering if I'm missing something in the config.  I have to set up L2L tunnels to two other firewalls.  One firewall has 3 discontiguous networks, and the other has 2.  I have 5 tunnels setup, is this the only way?  What I would like to see is 2 tunnels, one for each remote firewall, but then each tunnel would have access to the appropriate networks (like on the ASA side), is there anyway to do this?  Perhaps a command line util for this unit?
 
My other issue relates to the tunnel-groups I have set up on my ASA's, and I would like to use appropriate names...however I can't seem to find a way to enable this to happen on the 4400N side....what I mean is I need a way to create either a "keyword identifier" or a "firewall identifier" on the 4400N and I don't see an appropriate field in the web interface.

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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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Cisco WAN :: 5540 - Memory Utilization Getting Higher When Adding Tunnel

Jul 21, 2011

We terminated about 25 site-to-site VPN tunnels on the Cisco ASA 5540 (2 GB RAM). It appears that the memory utilization is getting higher when adding the tunnel. We are planing to remove those 25 VPN tunnels out 5540, and soon we will add additional 40 VPN tunnels on it. So it will be total around 65 tunnels, and maybe add couple tunnels per year for the future grow, but about 25 VPN tunnels are using at all the time, the others are just backup purpose, standby only. We are looking for the new network device (router or ASA) to accommodate the needs. Which network device is better to handle VPN tunnel for this infrastructure?

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Cisco VPN :: ASA 5540 - Client IPsec Authentication Using Digital Certificate

Sep 11, 2011

I need some clarification with configuring my ASA 5540 with IOS 8.3x for remote client certificate authentication.
 
I have my root certificate from the Microsoft CA but not quite sure if the outlined steps in the Cisco websites below are exactly what I need since the firewall seems to be generating the certificate to be used. [URL]. 
 
My setup is such that the CA will issue certificates to the remote clients and to the ASA firewall, and the remote clients will authenticate and connect with their certificates which the firewall constantly updates using the CRL update from the CA. The dhcp pool is to be issued by the domain controller on the inside network and not on the firewall. Any examples or best practice steps to achieve this.

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Cisco VPN :: ASA 5540 / Internet Access Is Slow When Running Full-tunnel

Aug 7, 2011

We have ASA 5540.  We setup Site-to-Site VPN and Remote Access VPN (Cisco VPN client).  If are running full tunnel on the Cisco VPN client, the internet access is slow.  For example, when we are running full-tunnel, the internet speed is 16 Mbps based on Speedtest.net.  When we go to Speedtest.net, some of the graphics do not load.  If we are running Split-tunnel, the internet access speed is 78 Mbps based on Speedtest.net and the Speedtest.net web site loads all the graphics. 

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Cisco WAN :: 1841 - Duplicate Multicast Packets With DMVPN Tunnel

Mar 21, 2013

I have a setup where a spoke (cisco 1841) is sending a multicast feed to a hub (cisco 2951) via a DMVPN tunnel on the Internet. The feed arrives on interface fa0/0 of the cisco 1841 and is forwarded to the tunnel interface.  It is about 160,000 kbit/s and 18 pps. This always looks the same:
 
cisco2951-1-hub#sh run int tu10
!
interface Tunnel10
description DMVPN TUNNEL

[Code]...

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Cisco WAN :: 3845 Routers - Receive Multicast Stream Via Tunnel Interface

Feb 16, 2012

I have two Cisco 3845 routers which receive a multicast stram via a tunnel interface, i.e Tunnel163 (PIM Dense mode is enabled). These routers are both connected to a LAN segment (FastEthernet0/1/0) where receivers are. [code] Router1 is the assert winner (highest IP address), it sees igmp joins request, but it's pruning the interface. It happens sometimes and it lasts until I manually issue clear ip mroute.Unfortunately I cannot migrate to Sparse Mode.

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Cisco Switching/Routing :: 1800 / 1900 / Unable To Receive Multicast Over GRE Tunnel

Sep 1, 2012

I setup a GRE tunnel between two cisco 1800 & 1900 routers. I can't received multicast.
 
Here is a copy of my configs:
 
R3#Building configuration...
Current configuration : 1238 bytes!version 12.4service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname R3!boot-start-markerboot-end-marker!logging message-counter syslog!no aaa new-modeldot11 syslogip source-route!ip cefip multicast-routing no ipv6 cef!multilink bundle-name authenticated!archivelog config  hidekeys! interface Loopback0ip address 10.0.0.3 255.255.255.255!interface Tunnel0ip address 192.168.24.2 255.255.255.252ip pim sparse-modetunnel source Loopback0tunnel destination 10.0.0.1!interface FastEthernet0/0ip address 10.0.3.1 255.255.255.0ip pim sparse-modeduplex autospeed auto!interface FastEthernet0/1ip address 192.168.23.2 255.255.255.252ip pim sparse-modeduplex autospeed auto!interface Serial0/0/0no ip addressshutdownno fair-queueclock rate 2000000!        router eigrp 1network 10.0.0.3 0.0.0.0network 10.0.3.1 0.0.0.0network 192.168.23.2 0.0.0.0no auto-summary!ip forward-protocol ndno ip http serverno ip http secure-server!control-plane!line con 0line aux 0line vty 0 4exec-timeout 5 0privilege level 15no login!scheduler allocate 20000 1000end

[code]....

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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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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
212.178.155.73                                                                 80.62.yyy.xxx (traffic source IP: 212.178.155.73)

[Code].....

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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 10.1.1.0/24 and i configure 10.1.1.0 0.0.0.255

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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. 
 
[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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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 :: 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 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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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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