Cisco Firewall :: Invalid Hostname With Dynamically Assigned DNS Error On ASA 5505
Jul 7, 2011
I have connected an ASA 5505 to an ADSL router that is able to assign the IP address and the also the DNS servers for the ISP for the outside interface. The ASA is loaded up with IOS "asa842-k8.bin"
I am using vpnclient with a hostname as oppose to an IP address to connect to a headend remote server. If I hardcode the DNS servers IPs in the "dns server-group DefaultDNS" I am able to resolve the hostname. If I then remove the IPs from the group and rely on the dhcp to assign them, when I try to resolve the name I have an error at the console "ERROR: % Invalid Hostname"
We have an ASA configured to access the internet, which works fine for clients who have an IP address assigned by DHCP, but not for clients with manually assigned IPs.
For instance, with the DHCP server configured to give IP addresses between 172.16.101.1 and 172.16.101.10, a device may get the IP address 172.16.101.1. This machine will have connectivity to the internet.
If we then configure DHCPd server range as 172.16.101.2 to 172.16.101.10 and statically assign the 172.16.101.1 IP to the client, it will not have internet access. It will, however have inside access and VPN access.
If I try to ping 8.8.8.8, the following is logged:
Where 'servers' is the name of the inside interface the request is made from and 'xxx.xxx.xxx.100' is the external IP. It seems as DNAT is not working when the client IP is static assigned.
Whenever I use the following command I get an invalid input error
ciscoasa#conf t ciscoasa (config) # crypto isakmp enable outside ciscoasa (config) #object network net-local ciscoasa (config-network) # subnet 192.168.101.0 255.255.255.0 ^ I have reset the firewall (cisco 5505) to factory default. The marker ^ is under the subnet
I have a small workgroup at home of about 4 or 5 computers. All the PC's, notebooks are running W7. I have one PC that I use as my "always on PC", with all my media and resources I use on it. The NetBIOS or computer name assigned to it is mediapc with a static IP of 192.168.254.150. All my other desktop PC's, excluding the notebooks, have a static IP also.The problem is more annoying then anything, and thus I only work on it intermittently. Today I decided to post after wasting much of another day attempting to resolve the issue.The problem is accessing my mediapc from any of my other computers while using the computer name, "mediapc". If I use the static IP assigned above, there is no problems. Everything works, RDP, Dameware, Telnet, SSH, Ping,Tracert, etc. If I use the computer name "mediapc" then it fails with an unreachable host error or similar. The reason it fails is because somewhere in my network or in the mediapc itself, it wants to resolve the "mediapc" name to an unknown IP of 192.168.254.47.
Now with this said, I can still share files and access the mediapc using the name in a UNC syntax, like //mediapc/data works fine or directly clicking on the mediapc share under Network works also. If I Ping mediapc from any other PC than itself, it fails with the 254.47 IP. If I try to use any remote connection software and use the name mediapc, it fails to connect.This is what I know and have tested:
1. Adding a host entry to all the client computers works but does not fix the root of the problem.
2. nslookup mediapc reports the wrong IP of 254.47
3. Remote connections as I mentioned above fail because the name is resolving to an invalid IP.
4. Pinging mediapc from itself, displays the correct IP of 254.150, although I have to use the -4 parameter.
5. Arp -a on all PCs report correct IP of 254.150 with the correct MAC address. (There is no 254.47 listed)
6. NBTstat -a mediapc reports correctly and shows the correct MAC address.
7. Network shares work correctly from and to the mediapc without issue. No access problems.
8. I have deleted all arp entries and flushed the dns with no change.
9. MS mentions to change order of the Bindings of the adapters, yet I only have one Local Area Connection.
When a client connects to the device like: 192.168.2.215 there is no dns assigned. My devices are unable to access the internet unless I manually assign the dns in the local settings for that host.
ASA 5505 and DMZ and Base License,"For example, you have one VLAN assigned to the outside for Internet access, one VLAN assigned to an inside business network, and a third VLAN assigned to your home network. The home network does not need to access the business network, so you can use the no forward interface command on the home VLAN; the business network can access the home network, but the home network cannot access the business network." Page 6-17.
This is exactly what I need. Mail server in DMZ, full access from internet to DMZ, and from inside network to DMZ, no access from DZM to inside network. If I good understand, this is possible with base license.
I successfully configure, internet Access for DZM and inside network, Mail server can be accessed from internet, as well as RDP on inside network. But I have problem to configure communication from inside network to DMZ. [code]
I was trying to give the following host name to my 3925 router.Iht comes up with the following error. DRT0(config)#hostname DRT#0 % Hostname contains one or more illegal characters.% Hostname "DRT#0" is not a legal LAT node name, Using "CISCO_000000" DRT#0(config)#
I'm new to working with the ASA 5505 ,VPN and reverse NAT.
The basic setup is as follows. I'm trying to setup a IPsec site to site tunnel with reverse nat on the remote side.
I have as the tunnel up and it passes traffic. I have setup reverse NAT for 172.x.x.1 to translated IP 216.x.2.101 my ASA also has an IP address of 216.x.2.102.
Any connection from 172.x.x.1 to 216.x.2.1 should appear to be comming from 216.x.2.101
When I ping or telnet from 216.116.86.1 to an open port on 216.x.2.101 I get the banner from 172.x.x.1, seems like it is working.
However in my setup I'm only given a singel IP that of the NAT address 216.x.2.101, so when I remove the IP address assigned to the inside interface 216.x.2.102. all conductivity is lost.
When I set the inside interface to 216.x.2.101 and I setup a static NAT rule for 172.x.x.1 to 216.x.2.101, I get a message that says all traffic will be redirected and I will be unable to connect to the ASA.
Once thats in place, and I make any connection from 216.x.2.1 to 216.x.2.101on any port I get a connection but then it's reset, I no longer get the telent banner I was expecting.
This might actually go into Networking Basics because of the nature of the problem, but I tossed it in here because of the Cisco product involved. Long story short, I need to do some detective work to figure an apporpriate IP address for a NIC.I recently started working at a company with the ASA 5505 and I need to upgrade the software image on a bunch of them. There's already a computer set up with a TFTP server and Hyper-Terminal to do it. I'm trying to use the CLI update procedur[URL] but when I get to the beginning of the actual transfer from the TFTP, I get stuck at "Accessing" and then the connection times out with the message "Unknown Error".The only thing I can think of is that somehow the ASA is not making it all the way to the TFTP server, probably because the IP address settings on the NIC for the computer is set wrong. I say this because in the config file provided me, the ASA is given an address X.Y.Z.1, subnet mask /24 (where all the letters are constants) and the TFTP server has an addess in its software config of X.Y.Z.10 mask /24, but the NIC on the computer is set to A.B.C.105, which is an entirely different network.I need to figure out what I can make the NIC IP address so I stop getting the error. I tried a couple of different X.Y.Z.x addresses, but haven't gotten anything yet.
I have configure L2TP vpn using ASDM and now i am not able to connect my Cisco ASA 5505. it's showing error message 3Jul 07 201118:57:38IP = *.*.*.*, Error processing payload: Payload ID: 1
I've configured vpn ipsec with wizard but my ip address assigned by pool not reach the lan network ,lan network: 192.168.0.0 /24,pool network: 193.168.0.0 /24
i just deployed Cisco NAC version 4.8.1 Virtual Gateway OOB on a LAN envieronment and on a WLAN envieronment, it works fine for some users , they can authenticate via the agent or web page, and then they are redirected to the access vlan, But for some other users in LAN and WLAN , when they try to authenticate via agent or web page the following error appears:
Invalid switch configuration-OOB Error:OOB client "mac/ip" not found.
I tried to find some pattern for the users but it dont match any pattern.
When I access setup on an RV220W with Internet Explorer, Mozilla or Safari the following message always displays:
"There is a problem with this website's security certificate. The security certificate presented by this website was not issued by a trusted certificate authority. The security certificate presented by this website was issued for a different website's address."
I access the router by clicking on "Continue to this website (not recommended)."
This also happens anytime a URL filter is triggered by a client. I.e., clients do not see the "Blocked by Cisco Firewall" message unless they also click on the "Continue to this website (not recommended)." option.
Even worse, when I attempt to connect as a VPN, the SLLVPN applet gets java connection refused. This is why I bought this thing!
What do I need to do to fix all these certificate related errors?
I am having the Cisco NAC enviroment (Software Version is 4.9.1) and OOB VG.
We are getting the below and attached Error while deploying on some machines.
"Invalid switch configuration-OOB Error:OOB client "mac/ip" not found."
Some users on same switches are working fine but some are not....
What would be the possibilities and any work around? other than keeping the port shudown for long time means that atleast 10 - 20 secs or more or a PC restart. Customer is not feeling comfortable with the current situation.
I am get stuck on this issue, i have asa 5505 which was working more than 4 months, after power recycle the firewall is not booting now, it gives the below error. i have tried to upload the new image however the story is same.
I use a CISCO ASA 5505 with ASA 8.3. Everything works fine, but when I type the following line I get an error message:
nat (inside,outside) source dynamic OBJ_SPECIFIC_192-168-1-0 10.1.5.5ERROR: 10.1.5.5 doesn't match an existing object or object-groupI even tried to create the missing object but it did not work. The document also explains how to use ASDM for this configuration. It seems that there an object 10.1.5.5. is created.
I Have a Firewall ASA 5505 with asa 8.4(2) asdm 6.4(5) I have only one Public IP services and need to publish on the Internet
External User (Internet) -> Calls connection on port 22 Internal server 192.168.1.124 External User (Internet) -> Calls connection on port 80 of the Internal 192.168.1.124 server or other server the same inside.
In the first moment I'm just testing the access port 22.I had it working in version 8.2 but after I updated to 8.4 does not work, I've tested several different configurations.
one of our customers wants to update the firmware of a 5508 wlc, but always gets the following error message:
Error Message %UPDATE-3-INV_FILE_SIGN: Error! Invalid image signature!. Image may be corrupt.
but the same image works fine on another 5508.the update was downloaded via a smartnet for the wlc, on which the update works fine. does the customer has to download another image for the second controller, or should the image work on both wlc?
computer was working fine a few days ago, all of the sudden not able to get online anymore at all,recieve error message 651 with dsl connection, and when trying to connect to wireless get an error message saying invalid ip adress configuration,
ipconfig/all reveals: C:Usersygydfre>ipconfig/all Windows IP Configuration Host Name . . . . . . . . . . . . : bygydfre-PC[code]......
I recently bought the E2500 Router and I am using the EA2500 Adapter with it . I have this set-up on 2 Desktop PC's . 1 Pc is working just fine with this set-up . The other keeps giving me an Error message of "Invalid Key Manual" . What does this mean ? The adapter is working because it does find the Router as a usable connection . It just isn't able to connect to it and keeps giving me the same Error message .
"The license is invalid." (Error code:2268435460) it happens with all versions tested on several PCs (Win2003 Server, WinXP). Already tried to reboot, edit the registry, etc but no luck. Using 3 dcs 2121?
All three of these options associate the same set of vlans to the FWSM but using different groupings. As far as I can tell, these groupings have no functional significance either on the switch side or the FWSM side. These are simply three different ways of specifying exactly the same thing? Am I correct?
is there any way to apply hostname or object network in the syntax? The command gives the option to use hostname or A.B.C.D but doesn't accept the hostname PIX1(config)# filter url except 0.0.0.0 0.0.0.0 ?configure mode commands/options: Hostname or A.B.C.D The address of foreign/external host which is destination for connections requiring filtering Can an FQDN be used as a foreign/external host?
I am able to access ASA via hostname but with IP address it does not work.Need to know what config i need to put so i am able to access it using IP by ssh and ASDM? ASA is 5520 version is 8
I am working on adding a mapping to our external address for our mail server - let's call it mail.example.com
I would like to be able to access mail.example.com internally for our user's smartphones - if they access our company WiFi they are not able to get mail using the mail.example.com as the server name in their phone setups. However, once they leave the office and use any other WiFi it works fine. Also, I am unable to ping that address from any internal device. I believe also this is the reason Exchange accounts do not work on our site to site VPN connections.
I have a ASA 5520 and work primarily in the ASDM 6.4 to do configurations in the main office and have 5510 in our site to site connections.
Pix 515e 6.3.4..A web server on our DMZ is exposed for external access.There is an "A" record (webserver.yyy) on a public DNS for this public IP.This works fine for external users. url..Now I have been asked to allowed our LAN user to access the same link and I CANNOT CREATE AN INTERNAL DNS RECORD TO TAKE CARE OF THIS, which means when our internal users access that link, the request goes out of OUTSIDE interface with a NAT overloaded address(111.111.111.2) that is in the same subnet as the URL is trying to resolve. Once it knows the IP address thru DNS resolution tries to comes back in thru the same Interface(OUTSIDE) to hit the web server in the DMZ and is not able to.
1- Where does the request from an internal user to hit url is dropped?
2- what can be done to allow this type of connectivity in the PIX 515e device?
I'm configuring a Cisco 877 router as my firewall.My WAN IP will be assigned dynamically with DHCP. I will also get my default route from DHCP.I will need to configure ip inspection and packet filtering.I will need to configure NAT, I will eventually need to also configure a dial-up VPN.
We are deploying two Cisco 5585 in transparent mode and multiple contexts. they are running Active-Active fail over.
There are a lot of V LANs need to be added in the contexts, we are trying to use least contexts to fulfill.
ASA supports 8 bridge groups for each contexts, and maximum 4 interfaces for each bridge group.
We have assigned four interfaces in different V LANs , set two of them as a pair with one IP sub net and the other two interfaces are in another IP sub net.
For example :
Bridge group 1:
inside1 and outside1 -------> 192.168.1.0/24 inside2 and outside2 -------> 192.168.2.0/24
However, we can only make one sub net(V LAN pairs ) work when the BVI is set to that IP sub net. If the BVI set to 192.168.1.0/24, the inside1 and outside1, the other pair not work. If the BVI set 192.168.2.0/24, then only inside2 and outside2 work.
Since the BVI can only be assigned to either of the sub net, Is it possible to make both vlan pairs work ? Or we only can have one sub net in one bridge group ?
ASA 5510 ASA 8.0 ASDM 6.1 I want some remote users to have split-tunnel connection, others not. I used Cisco Document ID 100936 "Allow Split Tunneling for AnyConnect VPN Client on the ASA Configuration...". I created a new Group Policy with split-tunnel enabled. I created a new Connection Profile and assigned to it the new Group Policy. When I authenticate at the AnyConnect client I get a dropdown of the 2 connecton profiles, to choose the one I want. Each of them works, enabling or disabling split-tunnel. But I want to assign a connection profile to the particular user, not give the user a choice. The problem is I'm using LDAP authentication. The Local Users I set up before LDAP are obsolete, assigning them a Group Policy does nothing. I really don't want to give up LDAP and force people back to another local password. But the LDAP authentication to Active Directory just says yes or no, it won't assign a connection profile. At the AnyConnect Connection Profiles page I have set a switch "Allow user to select connection profile, identified by its alias, on the login page. Otherwise, DefaultWebVPNGroup will be the connection profile". If I clear that switch every user will be assigned the same default profile, which does not work.
