Cisco VPN :: ASA 5505 Split DNS Setup
Mar 2, 2011
I have an ASA 5505 configured using easy VPN connecting to our corporate ASA. The ASA5505 is configured for network extension mode with a routable subnet. The clients that hang off the ASA 5505 are DHCP and get their IP address and DNS settings from the ASA 5505. I have a split tunnel setup, so only certain networks go over the tunnel back to corporate. Local Internet browsing goes out the ASA 5505 to the ISP.
My questions is how to setup split-dns. i would like to have my clients query the ISP's DNS servers for Internet based websites and when they need to access the exchange server the query goes to our corporate DNS servers. I see a setting for DNS names under the group policy on the corporate ASA, but how does the client know which DNS server to use?
The clients receive a primary DNS server (ISP) and a secondary (Corporate DNS) from the ASA5505.
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Jul 25, 2011
my company has used Split Tunneling for all of our VPN uses, however we recently purchased 2 ASA5505s for use at various jobsites, and have been running into problems with Local Network Administrators blocking certain traffic that we need to operate. They allow full VPN connectivity to traverse their networks, so we are able to use our LAN Resources over the split tunnel no problem.
We have it set up as a Dynamic L2L Connection, and this ASA is operating flawlessly minus the traffic being blocked upstream by the network admin. Our VPN topolgy is Hub & Spoke. Below is excerpts from our config on how the VPN is set up: [code]
What we'd like to achieve is being able to pass ALL traffic (LAN & Internet) through the VPN tunnel, then be processed by the Hub ASA (192.168.9.1) on the other end. I am guessing crypto map + routing would have to be changed?
access-list to_hq extended permit ip 192.168.101.0 255.255.255.0 0.0.0.0 0.0.0.0route inside 0.0.0.0 0.0.0.0 192.168.9.1Disable NAT on Spoke. Is this how I would go about doing this??? We need ip address dhcp setroute so our ASA can find the other end and form the VPN tunnel, and I am not sure how this would affect things. [code]
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Nov 5, 2012
I've an ASA 5505, running at ASA 8.2(2). I'm using ASDM 6.2(5).ASA is set up with Split Tunneling and it works perfectly.However, for a few users, I want all traffic, including Internet traffic, routed through the ASA.The spesific users IP address at internet should then be the same as ASA Outside address, not the client local address.The question is therefore:How to simple override the split tunneling at user level?Alternatively set up an "tunnel all" group policy for the specified users?
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Jul 31, 2012
I have an ASA 5505 current f/w & the security plus license (to get the 3 nameif interfaces). Can I split traffic between two ISPs, (VPN traffic to one destination on a T-1 on one VLAN, and all other traffic using DSL to another VLAN) and using a different nat policy on both? I know load balacing isn't supported, only failover. I was just wondering if there was a way to make this work.
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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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Jun 17, 2012
Trying to setup split tunneling over Site-to-Site (Gateway To Gateway) VPN between RV082 and Win 2008 server. Tunnel seems to be ok, I can ping/access by IP hosts from both ends. But I can't get split DNS to work. Here is the setup
10.10.100.2 is the DNS server for xyz.local zone. It is at remote network.
The tunnel and routing work properly. I can ping 10.10.100.2 either from RV082 (system management - diagnostics) or from hosts at local network.
Moreover, I can run nslookup on a host from RV082 side (local network), set 10.10.100.2 as server to be queried and test dns resolution. names of hosts from xyz.local are resolved correctly. But. If I use nslookup on host to query RV082 as a DNS server and query for a host from xyz.local it responds that xyz.local is nonexistent domain. The same result I get trying to resolve/ping same name on system management - diagnostics page. Resolution of names from xyz.local fails. But Internet names are resolved
just fine.
I've tried to reboot the router, connect/disconnect the tunnel, set Domain Name fields of split DNS configuration pagein different ways including fqdn of hosts from xyz.local No effect. Just the same situation.
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Jul 21, 2012
We have ASA 5520 acting as the VPN Server and Cisco 1941 router as EZVPN client. Since last few days client is not able to establish vpn connection. 1941 router is continuously generating the below log messages
001569: Jul 22 12:19:05.883 ABC: %CRYPTO-4-EZVPN_SA_LIMIT: EZVPN(VPNGROUP) Split tunnel attributes(51) greater than max allowed split attributes(50)
001574: Jul 22 12:19:07.835 ABC: %CRYPTO-6-EZVPN_CONNECTION_DOWN: (Client) User=vpn_user Group=VPNGROUP Client_public_addr=<client public ip> Server_public_addr=<server public ip>
004943: Jul 22 11:32:42.247 ABC: %IP_VFR-4-FRAG_TABLE_OVERFLOW: Dialer1: the fragment table has reached its maximum threshold 16
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Aug 31, 2010
To set up AnyConnect on my ASA5505? I have my VPN access working properly through the Cisco client however I want to be able to use the clientless program as well that is available.
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Mar 17, 2013
ASA 5505 Sec plus lic w/OS 9.1
I want to setup a quick and simple VPN server on my ASA. I want to do local authentication and, once authenticated, I want to allow all internal access. I only have 1 WAN IP. I'm finding a ton of conflicting info online. The ASA is already setup and is operational. I just need the correct commands to setup the VPN.
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May 7, 2012
I ordered a IPS module to a small ASA to replace a Snort IDS Server.I want only to perform IDS and reporting (not inline) The design (simplified) is
The problem is that i read this morning that ASA cannot handle this type of scenario, it can only analyse the traffic that is passing through it. Is there a chance to make this work ?
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Jun 13, 2011
There is so much mis-information on the Internet and Cisco's own support site has bits and pieces everywhere (I've found at least 5 support pages in Cisco that address this subject), none work or are directly targeted at what I would consider is a major use case for this product. I can see from the many posts everywhere that getting L2TP/IPSEC to work is a major problem, requiring many configuration steps that all have to be perfect and there seems to be some trick to get it to work that most people struggle with. Most of the advice out there is impertinent and highly technical but doesn't work.
I would like to know if there is any consolidated instructions that WORK to create a VPN server on the 5505 using the ASDM and also how to set your Windows 7 (or 2008) client to work with it.
Like I've said, I've spent hours and hours on this and have yet to get anything to work. I have a brand new 5505 connected directly to DSL (static IP) that I ran the wizard on and followed the best advice I could find (by the way there's TONS of information on getting XP to work but afaik, this does NOT work for windows 7). Now that I've tried various things without success, I believe I've gotten it so fouled up I need to reset to factory defaults and start over.
I also have another brand new 5505 connected to a different DSL line. Behind that firewall, I have both windows 7 clients and windows 2008 server. I've tried lots of different things to get these to work including the registry hacks (which, if indeed is required, I seriously can't believe that Cisco hasn't given us a tool for).
I have tried to use the ASDM to do all my programming as I find the CLI to be extremely error prone and virtually incomprehensible.So, what the world needs is one place that gives all the instructions on what to do, step-by-step that really work for this simple use case of windows connecting to the ASA.
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May 26, 2013
I have an ASA 5505 that I would like to use only as a VPN access device into my network. I am looking for the most secure setup.
Currently I have a router with 4 networks/subnets: DMZ, public, protected, perimeter. DMZ is public DNS and web, no access to any other subnets, only 80 and 53 from public. Perimeter is an edge email server, only port 25 allowed to the email server on the protected subnet. Protected is all internal servers and workstatoins, no access from any other subnet and limited access out to public.
Where would I place the VPN device?
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Aug 13, 2012
I have been asked to setup a VPN on a stick setup so that people on the move can use the encryption of our SSL VPN for web browsing etc using Any Connect. This works fine, whats my ip shows the external IP of the office when connected to the VPN and all traffic is pushed down the pipe. The only issue is when connected I have no access to local resources such as IP printers etc. How to do this on 5505?
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Aug 4, 2011
I have a new Cisco ASA 5505 which I am trying to just setup so that all computers on the LAN can get to the internet (browsing and ping). My current setup attached.
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Nov 1, 2011
I have an ASA 5505 with a dynamic IP address from the ISP.What I need to accomplish is the following:
- Either setup that ASA (Dynamic IP)VPN with an IOS router (Static IP)
- Or setup that ASA (Dynamic IP) with another ASA (Static IP)
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Mar 25, 2011
I need to setup a L2L vpn between two ASA 5505 model. but due to poor planning and documentation both sites has same subnet (192.168.1.0/24) now i need to set up L2L wtih overlapping subnets. is it possible with asa 5505?
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Apr 23, 2013
I have a problem with a branch office setup, and I can't for the life of me think of what the problem is.I have a remote office setup, using an ASA 5505 that is set up to establish an easy vpn connection to the central network. The connection at the branch office is a 20/5 cable modem, the central network has a 25/25 fiber connection.
The issue I have is this. Wired clients work fine at this branch office, at least 95% of the time. I have a lightweight AP there that can come up and join the controllers at the central network, no problem. I haven't done anything with H-REAP because there are really no resources locally they need that would allow them to do their work, so all traffic is tunneled back to the WLC.
Wireless clients can authenticate to the AP, and I can get 15-20ms ping responses from them all day. Latency never comes close to the 600ms proposed limit with CAPWAP. Yet, for some reason the performance of the clients is problematic. Webpages will frequently not load correctly, they experience some freezing, and with one application we use - it refuses to load completely.If we bring these same computers to an AP connected to our central network, on the same SSID, they work flawlessly.
Something about this particular location is causing a lot of grief for our users.For what it's worth, we are running WCS 7.0.230.0 and the WLCs are on 7.0.116.0. The ASA is running a pretty basic configuration, pretty much out of the box with the easy vpn configuration entered.
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Aug 16, 2010
I currently use MS ISA Server 2006 to protect a windows internal network, where there is also an MS Exchange server. I have acquired a Cisco 5510 to enhance security at main office. Later I will have ASA 5505 for branches, including VPN-ning. to have firewall at main office. I have several public IPs and would like to setup DMZ for Web, Exchange server and FTP. How do I setup interface and sub-interface for the DMZ?Can I continue using ISA Server connecting to Cisco 5510 on the perimeter? If so, How do I set the interfaces (and sub-interfaces) as well as NAT-ting and access configuration between the inside and outside?
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Apr 11, 2011
I have setup a vpn connection at my remote offices with a 5505. At my main office I have a 5510.From my remote offices I can PING my Main office server. However when I go to set up a vpn connection through windows network and sharing center I can't seem to have the connection connect.....
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May 12, 2013
I'm having trouble setting up a second IPSec VPN tunnel on my Cisco ASA 5505 to another office. I was able to setup the first one with no problem through the ASDM, but have not been able to get the second one up.The IPSec tunnel is connecting to a WRVS4400N router at the other office. I tried debugging crypto isakmp, and crypto ipsec, but I'm getting nothing. Below is the config. Does something look wrong on my end? I also attached a screenshot of the parameters setup on the remote router.
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Jan 13, 2013
I have two 5505's facing each other over 10meg dsl internet links with slow up links, I think that the uplink is around 768K and down is 10meg.Behind each ASA on each end sits a pbx they are using H.323 point to point trunk for connectivity to talk to each other one the g.729 codec. I've read a little on Qos and I'm wondering if GRE over IPSecis the way to configure this setup. I'm needing recomendations. There are is no qos at present configured and its not working well at times. There are only 5 phones at the remote site and 5 computers. The remote end only supports 3 vlans as well. I'm new to ASA.
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Dec 5, 2011
i need to configure a ASA 5505 in transparent mode.learned from Internet, my configuration is :
int e0/0 --- vlan 1---->nameif outside
int e0/4 --- vlan 2------> nameif inside
gloable ip is 172.17.104.10 255.255.255.0
http server enable
http 172.17.104.0 255.255.255.0 inside
when i connect the outside interface to one PC with ip addr 172.17.104.194 my PC connect to inside interface with ip 172.17.104.249 cannot ping each other even when i set rules as permit any any on both direction
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Apr 24, 2013
I followed a few Youtube videos and replicated another ASA's VPN configuration through ASDM to create the Anyconnect VPN on the ASA 5505.
The problem is, after everything checked and triple checked, I still cannot get to https://external_IP. I can post configs if needed, but I really did replicate another ASA almost exactly.An online port scan shows my external IP as "not listening on port 443".However, when I run on the ASA :
I get the following (external IP changed to 123.123.123.123 for the forums):
Protocol Socket Local Address Foreign Address State
TCP 0004426f 192.168.8.4:22 0.0.0.0:* LISTEN
SSL 0574f7af 123.123.123.123:443 0.0.0.0:* LISTEN
DTLS 0577b0ef 123.123.123.123:443 0.0.0.0:* LISTEN
TCP 06fa8d1f 123.123.123.123:80 0.0.0.0:* LISTEN
SSL 079385bf 192.168.8.4:444 0.0.0.0:* LISTEN
So it does appear to be listening on the external IP on the outside interface correctly.I went ahead and tried the whole "change the ASDM port" as you can see from the inside interface being changed to 444 but management isn't even enabled on the outside interface so I'm not sure why it is acting this way.
The outside interface is plugged into a DSL modem. I don't think this DSL modem has any real intelligence, but I was going to disconnect the ASA and plug my laptop into the outside interface (on the same subnet) and then see if I could reach it. That was the only thing I could think of...that possibly the DSL modem was blocking the inbound traffic.
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Oct 7, 2012
i want to setup a vpn connection between Cisco asa 5505 and centos server.
Here is my senerio:
ASA 5505
Public IP address 155.155.155.2
Local NETWORK : 192.168.6.X
Centos Server
------------------
Public ip address : 155.155.155.6
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Oct 21, 2012
I have two 5505 ASA. I would like to know can I make two 5505 failover redundant with active standby setup?
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May 8, 2012
I have a newly aquired asa 5505 that I just set up to the bare minimum configurations. I followed a cisco paper on how to create a "remote access vpn" setup for ipsec. I can sucessfully connect and establish a VPN, but when I try to access an inside resource from the vpn address, the asa blocks it.
Specific error is: Code...
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Nov 6, 2011
I'm trying to set up a 5505 (running 8.3) so that i can use the client vpn through RADIUS authentication.I have set up a new local RAIDUS windows box and used the ASDM asistant and a few other guides to setup the 5505.
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May 22, 2012
how can I setup that the backup connection will start but after 30s of icmp timeout the default gateway (tracket object - 192.168.1.1)
My configuration:
sla monitor 123
type echo protocol ipIcmpEcho 192.168.1.1 interface outside
num-packets 3
frequency 10
sla monitor schedule 123 life forever start-time now
route outside 0.0.0.0 0.0.0.0 192.168.1.1 1 track 1
route backup 0.0.0.0 0.0.0.0 192.168.2.1 254
track 1 rtr 123 reachability
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Aug 11, 2011
I am planning to imlpement an ASA 5505 in my home network and I am wondering if this is a valid configuration. I am wondering if it is necessary to have 3 separate internal subnets or if these can be cabeled together in a more efficient fashion?
I plan to keep the 2 servers (game, e-mail) branched off the ASA directly in a DMZ configuration. The rest of the clients connect through the wireless/wired router.
Any unforseen problems with a setup like this (Modem -> Firewall -> Internal Router)? I have read sites that say I will have to accept an IP via DHCP for the ASA's external interface.
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Oct 25, 2012
I'm having trouble setting up the correct rules on an ASA 5505 I'm using in my home office. I have a couple of IP Cams I need to access remotely.
I've tried setting up simple NAT(PAT) and/or Access Rules, but it hasn't worked. I have a single dynamic IP for the Outside interface. Call it 77.76.88.10 and I am using PAT. The CAM is setup to connect on port 80, but could be configured if necessary. I've tried setting up NAT Rules using ASDM as follows:
Match Criteria: Original Packet
Source Intf = outside
Dest Intf = inside
[Code]....
I'm afraid to use CLI only because I am not confident I'll know how to remove changes if I make a mistake.
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Aug 27, 2011
I have two ASA 5505's. One is currently setup as my firewall connected to the Cox Cable modem and wireless AP. I have another ASA that I would like to use, I have an idea that I could set that one up as a VPN unit, but not sure how I could do that. If that is not an option, can you provide the command line instructions on how to setup the VPN via the console cable. [code]
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Sep 20, 2012
I have been using static NAT to map between a single server behind an ASA 5505 and a single public IP address. In other words, I've been doing this:
object network NAT_ME
nat (inside,outside) static interface
Now I would like to start using the clientless VPN feature of the ASA, so I of course don't want that particular port forwarded to the server. Is there a way to define such an exclusion? I've tried several things, including setting up a separate NAT rule to direct that port back to the ASA's interface, without luck.
If that is not possible, what configuration would I need to move to in order to get the behavior that I want? It is important that all (non-VPN) traffic is passed exactly as it arrives at the firewall (whether it is coming from internal or external), with the exception of changing the IP address (i.e., I need static port mappings for some of my services).
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Sep 9, 2012
I have assigned a task to configure a vpn between windows 2008 server and cisco asa 5505, what kind of vpn should i go with as the windows 2008 server r2 is on cloud and is it possible to configure site-to-site vpn for this network senario or not.. i have try ikev1/ipsec remote access vpn with l2tp with (CHAP, MS-CHAP v2) and couldn't find any document which will allow me to configure windows 2008 server to behave a client and connect it to asa, well what i did is that i configured a dail-up connnect with l2tp and found the following debug message
Sep 09 20:04:02 [IKEv1 DEBUG]IP = 172.16.32.5, Oakley proposal is acceptable
Sep 09 20:04:02 [IKEv1 DEBUG]IP = 172.16.32.5, IKE SA Proposal # 1, Transform # 1 acceptable Matches global IKE entry # 1
[Code].....
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