Cisco VPN :: 550 Site-to-site VPN Duplicate Subnet?
Dec 3, 2009
here is my setup:
ASA 5505 - 192.168.3.1
PIX 501 - 192.168.1.1
PIX 501 - 192.168.1.2
The ASA and the first pix device (192.168.1.1) are connected via site-to-site VPN on the ASA side and the connection works great. I can access hosts in either direction from either network.I'm attempting to add the second pix device to the ASA's site-to-site configuration, but it's not working. I suspect it's because the devices are on the same subnet, but I'm hoing to find a workaround.When I have both PIX devices setup for site-to-site on the ASA, the VPN works only for the connection that has the highest priority. The device with the lower priority can only ping the 192.168.3.1 network, but full network connections fail.Is it possible to do this without changing the subnet on the second PIX?
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Feb 14, 2011
I have a cisco ASA 5510 at the branch here. It terminates about 8 vpn tunnels and also it supports remote access clients. I just have a quick question. Can my remote sub-net group access the other remote access site-site VPN subnet group. If yes then how should i configure it.
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Jan 14, 2012
I have some VPN site to site ( site B and site C connect to site A ). This subnet 10.0.56.0/28 is behind site B. Another subnet 10.0.56.16/28 is behind site C. I would like to route this 10.0.56.0/28 to reach the subnet 10.0.56.16/28. Is there any possibility to do this on ASA5520 (site A)?
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May 7, 2012
I have a functioning site-to-site VPN between two ASA 5505 appiances. Sub-net on one side is 192.168.20.0/24 (inside I/F) and on the other side is 192.168.30.0/24 (inside I/F). VPN is built over public Internet (outside I/Fs of those two ASAs).
Now I connected another subnet on 192.168.30.0/24 - e.g. 192.168.35.0/24. Traffic from 192.168.30.0 subnet is routed to 192.168.35.0 via Gateway at 192.168.30.250 IP.
My task is to make packets from 192.168.20.0 subnet to go to 192.168.35.0 subnet and vice versa.
I setup a static route on 20.0 ASA's Inside interface as 192.168.35.0 255.255.255.0 to 192.168.30.250. I also created NAT examptions for outbound packets from 20.0 to 35.0 and inbound as well. I also added destination network of 35.0 to VPN cryptomap traffic selection (on both ASAs).
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Sep 23, 2012
I have to set up site to site VPN with overlapped network ASA 5540 and checkpoint what is the best parctice to achive tis goal.
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Feb 4, 2013
I have ran into this problem in the past but clearly I usually change one of the remote host sub net ranges to something other than main site. Now I am in a situation that I just have to configure it this way. I just need some insight before implementation.
Inside (10.10.10.x/24) ASA5505 outside (97.65.x.x) ßà (97.664.x.x) outside ASA5505 (10.10.10.x/24)
Trying to create a site to site tunnel between each location with same sub net. I have found a lot of information about setting up this configuration with 8.3 and later but nothing for the image 8.4 and image 9.1(1) as everyone knows the ACL's and NAT statements are written differently now.
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Nov 23, 2011
I have a 5505 connected to 5510 via a site to site VPN, the vpn has 5 subnets on the acl list at both ends, but 2 of the subnets are assigned for remote access on the main 5510, which means the flow of traffic on these 2 subnets are main to remote, but the VPN only works if the traffic starts from remote to main.
both sides are set to bidirectional and I'm not sure if this is the case for all 5 subnets has remote site always sends data to the other 3 subnets first.
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May 18, 2012
I have a requirement to create a site to site vpn tunnel on ASA 5510 from a remote site to my HO, ihave already other site-to-site tunnels are up and running on the ASA.The issue is my remote site has got the network address which falls in one of the subnet used in HO(192.168.10.0/24).My requirement is only My remote site need to accees couple of my servers in HO which is in 192.168.200.0/24 subnet.
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Jun 17, 2012
We have ordered a pair of Cisco ASA5520 (ASA5520-BUN-K9).Now there is a requirement to terminate site-to-site VPN from remote site. Do we need VPN plus licence for this and how much it cost?
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Jun 13, 2012
The scenario where a Site to Site VPN tunnel has been established between Site A and Site B. Lan on Site A can ping Lan on Site B. My problem is a Printer behind Site B needs to be accessed by using the WAN IP address of Site A. Also i could not ping the remote lan or printer from the router.
Below are my configure on the Cisco 877 in site A.
Building configuration...
Current configuration : 5425 bytes
!
! Last configuration change at 15:09:21 PCTime Fri Jun 15 2012 by admin01
!
version 12.4
no service pad
[code]....
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Oct 11, 2011
cisco products and am struggling getting a VPN going between an ASA 5505 and 5510. I have a VPN created (using the VPN wizward on both) and it shows the VPN is up, but I can't ping the remote site (from either side).
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Feb 7, 2011
I have ASA 5505, i configured site to site vpn between central site and remote site and is working. Now the problem is we use remote site for troubleshooting purpose, so we need to create a tunnel from remote site to central site. I need to configure such a way that remote site can craete a tunnel to central site, but central site not able to create a tunnel, it just respond to remote site.
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Mar 6, 2011
i have 2 router asa 5505 with base license i wanna make site to site vpn connection and remote site using vpn client to connect first i have hdsl router with 5 public ip i wanna try it by giving 1 public ip to each router and try the vpn but nothing work?
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Jan 27, 2012
i want configure VPN between backoffice which have ASA5510 firewall with static IP and site which have cisco router 1861 with dynamic IP.
how i can configure the site to site between them?
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Jul 12, 2012
I am trying to set up a site to site ipsec connection. AT site A, I have Vlan's 652-10.55.216.0/24, Vlan653 -10.55.217.0/24, Vlan 654-10.55.217.0/24 and Vlan655-10.55.219.0/24 and at site B, Vlan650-10.55.214.0/24 and Vlan651-10.55.215.0/24.The problem is that I am unable to get any associations when i do a "sh crypto isakmp sa"/"sh crypto ipsec sa" on either router at each site.I am also unable to ping by pluging in a laptop into the site at each site. Laptop at site A is set to access vlan 655 and laptop at site B is set to acess vlan 651. I can ping all the devices from one end to the other.I have turned on debug crypto isakmp, debug crypto ipsec, debug crypto ipsec errors but dont get anything at all as output.I have attached the sh run for each router Cisco (1941/K9) and switch (Catalyst 3750) at each site.
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Nov 21, 2012
I have an ASA 5525 and need to configure site to site ipsec vpn to 3 peers. I currently have an existing /28 public address from my ISP that is used by other services.Is there a way to use this existing ip range to configure IPSEC tunnels to 3 peers ?
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Sep 12, 2011
I configurated Ipsec vpn at asa 5510. my inside ip 192.168.10.156my public ip: 85.x.x.xmy peer ip : 62.x.x.x
the project is that:
the remote site want the interesting traffic like that:
source ip 172.16.1.104 can access destination ip 10.0.154.27
My inside ip is 192.168.10.0/0 and i can not to change it 172.16.1.0/24 and i can not to add this ip at my network.
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May 30, 2013
I would like to know both Cisco 2901 or 2921 router and Cisco 5505 ASA can build site to site VPN.
1) what is the different to build site to site VPN between router and firewall ?
2) which is the best choice if using in site to site VPN connection ?
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Mar 6, 2013
Our Headquarter (asa 5510) is running a site to site vpn connection with a Branch office (router 2811). All remote users are accesing the internet through the VPN and also accesing headquarter file servers.I want to know if there is a way for some remote users to be able to use the vpn for accesing the file servers but to access the internet through the branch office. The rest of the remote users will be still accessing the internet through VPN.
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Nov 27, 2011
We've just deployed a site-to-site VPN using a 5505 ASA on the client's site and a checkpoint Nokia FW on our site. Everything seems to be fine except that the user's connections to their file shares seem to be intermittently dropping. One minute the connection to the shares is there, next thing it's lost. There is no logic to it because no two users are experiencing issues at the same time, as a matter of fact even on the same PC where a user has access to 3 shares on 3 different servers, one could be showing as connected whereas the other two be dropping. [code]
As you can see the Duplex and Speed are set to auto, I've rectified this since then and I'm keeping a close eye on the output errors, and collisions. However, I'm afraid that this did not rectify the issue and the users are still experiencing intermittent connection dropping to their file shares over the VPN!
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Jul 28, 2011
I have a request to establish a site to site VPN with a customer. While collecting the information I give them our local network subnet which is a private subnet (192.168.5.0). They asked me if I could give them a public address instead. They can not work with the 192.168.5 subnet. Is this possible?
My side of the VPN is an ASA 5505 running 8.2(2). The other side i believe is a Checkpoint.
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Apr 22, 2012
I've setup a site to site vpn on an ASA 5510 using ASDM (as I have many times before) and the tunnel appears to be up but I am not able to pass traffic. When I run the packet tracer from my inside network to the remote destination network, it shows that it is blocked by the implicit deny ip any any rule on my inside incoming access list.
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Aug 13, 2012
Got an ASA5505 connected to another endpoint running IPsec and being NAT'd at each end to a 10.0.0.0/24 network. I can pass other types of traffic through the ASA 5505 but not RTP traffic. The moment it is NAT'd and hits the firewall rules it gets denied by the default deny at the bottom of the list.
Currently the rules are as follows
Incoming External
allow ip any any
allow tcp any any
allow udp any any
default deny
[code].....
It wont allow us to setup a voip call...however when the same call manager sets up a voip call NOT using this ipsec tunnel it works just fine.
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Jul 15, 2012
we have two ASA 5510s one in 8.4(4) and one in 8.2(5) in a site-to-site VPN setup. All internal traffic is working smoothly.Site/Subnet A: 192.160.0.0 - local (8.4(4)) Site/Subnet B: 192.260.0.0 - remote (8.2(5)) VPN Users: 192.160.40.0 - assigned by ASA When you VPN into the network, all traffic hits Site A, and everything on subnet A is accessible.
Site B however, is completely inaccessible for VPN users. All machines on subnet B, the firewall itself, etc... is not reachable by ping or otherwise.There are also some weird NAT rules that I am not happy with that were created after I upgraded Site A ASA to 8.4
Site A internal: 192.160.x.x External: 55.55.555.201(main)/202(mail)
Site B (over site-to-site) is 192.260.x.x External: 66.66.666.54(all)
I pretty much just have the basic NAT rules for VPN, Email, Internet and the site-to-site.What do I need to add for the VPN to be able to access the site-to-site network?
Here is my NAT config:
nat (inside,Outside) source static DOMAIN_LOCAL DOMAIN_LOCAL destination static VPN_Network VPN_Network no-proxy-arp route-lookup
nat (inside,Outside) source static DOMAIN_LOCAL DOMAIN_LOCAL destination static DOMAIN_REMOTE DOMAIN_REMOTE no-proxy-arp route-lookup
!
object network DMZ_Network
nat (DMZ,Outside) dynamic interface
object network DOMAIN_LOCAL
[code]....
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Jul 21, 2011
I setup RA-VPN under local asa 5510 IP pool (192.168.127.0/24) and all was working fine. I got internet and local network access.
Then i have 5 site to site VPN working fine but when im traying to access to those L2L VPNs from the remote acces client im not able to do that. So after that i decided to obtain IP addresses from my DHCP server so i can obtain IPs from my local network (172.17.16.0/16) and then access normally to the VPN site to site. But the surprise was that the VPN cisco client is getting local IP address (172.17.16.222) perfectly but im not able to access even to my local network.
I have the same-security-traffic permit inter-interface same-security-traffic permit intra-interface enable.
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Apr 3, 2013
I have two Cisco routers - 2911 in HQ and RV180 in branch office. Because in HQ LAN network I have some development servers, to which guys from branch office need to have acces, I decided to setup VPN site-to-site between HQ and branch office. Everything went quite smoothly, on both devices I see, that ipsec connection is established. Unfortunately I am not able to ping resources from one network to other one and vice versa. Below is the configuration of 2911 router (I skipped som unimportant (imho) configuration directives) :
crypto isakmp policy 1
encr 3des
hash md5
[Code].....
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Feb 7, 2012
ASA = 8.2(1)
ASDM = 6.2(1)
Recently I used the wizard to create an IPsec site-to-site connection, which went very smoothly; however, I now noticed that when I connect via Anyconnect 2.5.0217 I cannot get to local and subnatted resources on the network.
I rolled back to saved config file, which was taken before the site-to-site vpn was created, but that did not work as well.What should I check to see why I can no longer get to different subnets after the site-to-site vpn connection.
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Mar 9, 2011
I am try to configure ASA 5510 with 8.3 IOS version.My internal users are 192.168.2.0/24 and i configured dynamic PAT and are all internet .
i want configure identity NAT for remote access VPN.Remote users IP pool is 10.10.10.0 to 10.10.10.10
i know to configure NAT exemption in IOS 7.2 version. But here IOS 8.3 version. configure NAT exemption for 192.168.2.0/24 to my remote pool( 10.10.10.0 to 10.10.10.10).
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Apr 16, 2011
I have a ASA 5510 actve/standby and create one site to site VPN with remote peer ip address xx.xx.xx.xx, Our VPN traffic running on 6 mb internet link for video conferancing traffic.Now client give another link 2 mb internet and client told to us our data traffic runnig on 2 mb link but this data traffic running on the same remote peer IP xx.xx.xx.xx.
Secondly request also they need failover over the ISP link.
how we immplement the same on ASA 5510.
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Aug 14, 2012
Got an ASA5505 connected to another endpoint running IPsec and being NAT'd at each end to a 10.0.0.0/24 network. I can pass other types of traffic through the ASA 5505 but not RTP traffic. The moment it is NAT'd and hits the firewall rules it gets denied by the default deny at the bottom of the list.
Currently the rules are as follows
Incoming External
allow ip any any
allow tcp any any
allow udp any any
default deny
[code]....
It wont allow us to setup a voip call...however when the same call manager sets up a voip call NOT using this ipsec tunnel it works just fine.
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Oct 10, 2012
I have a ASA 5510 at our corporate HQ that has one site to site VPN. I need to add 6 additional site to site VPN's to this ASA for our remote branches. How can I add them without affecting the existing site to site VPN? The 6 site to site VPN's will all have the same settings however these settings are different from the existing site to site that I already have set up. How can I set it up so the 6 additional VPN's use their own crypto map and all use the same settings?
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Jun 11, 2013
We recently purchased an SRP527W router because of its capability to configure site-site VPN tunnels. The configuration of IKE and IPSEC is working and the tunnel comes up but the problem is that the router is passing our internal IP addresses through the tunnel. The remote end we are connecting to requires us to hide all traffic behind one IP address which would ideally be our external static IP address from our ISP.
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Jan 28, 2013
With à customer we have à site to site VPN connection. In this tunnel there is one subnet routed with a 3des-sha encryption / hash. Now the want to add a new subnet in this tunnel, but with a AES-128 / MD5 encryption / hash. Is it correct if we make a new crypto map with a higher seq. number?
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