Cisco Firewall :: ASA 5510 NAT Doesn't Appear To Be Working
Mar 8, 2012
I've got an ASA 5510 running 8.4.I have a host on an inside interface, with a static NAT configured on the ASA. The inbound/return half of the NAT doesn't appear to be working. [code] I run a ping from the host (192.168.100.98) to something on the outside (1.2.3.4)Running captures, I can see the outbound ping leaving, having been NATed OK. I can see the reply coming back in to the outside interface with the correct IP address, but I never get the final NATed packet appear on the inside interface. The packet just disappears inside the ASA.
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Feb 15, 2012
I have a ASA 5510. I setup basic configuration to test internet with 2 ISPs. My first line works with out any problem. But my second line doesn't work. Even when i wipe the configuration, and setup only my second isp. Internet doesn't work. Can you tell me if there is anything wrong with this config?
CaaaA01# sh run
: Saved
:
ASA Version 8.3(1)
!
hostname CaaaA01
domain-name example.com
[code].....
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Dec 21, 2010
I'm trying to setup a L2TP VPN Connection on my ASA 5510 to connect with Android/Windows (Native Clients).I'm using the newest Releases:Cisco Adaptive Security Appliance Software Version 8.3(2) Device Manager Version 6.3(5)
My asa config just the interesting part:
crypto ipsec transform-set trans esp-3des esp-sha-hmac crypto ipsec transform-set trans mode transportcrypto ipsec security-association lifetime seconds 28800crypto ipsec security-association lifetime kilobytes 4608000crypto dynamic-map dyno 10 set transform-set transcrypto map vpn 20 ipsec-isakmp dynamic dynocrypto map vpn interface outsidecrypto isakmp enable outsidecrypto isakmp policy 10 authentication pre-share encryption 3des hash sha group 2 lifetime 86400no crypto isakmp nat-traversal
[code]....
If i try to connect with a Windows 7 Client (NOT behind NAT) I get the Error 691.
I see that Phase 1/2 are working with debug:
Dec 22 16:32:16 [IKEv1]: Group = DefaultRAGroup, IP = XXXXXX, PHASE 1 COMPLETED
Dec 22 16:51:25 [IKEv1]: Group = DefaultRAGroup, IP = XXXXXX, PHASE 2 COMPLETED (msgid=00000001)
Then I see this "Error":
Dec 22 16:51:26 [IKEv1]: Group = DefaultRAGroup, IP = XXXXX, Session is being torn down. Reason: L2TP initiated
I don't understand why it doens't work....I tried many templates from the net but nothings works.
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Apr 5, 2011
since our update of Cisco ASA 5510 (active/standby cluster) from version 8.22 to version 8.24 it isn't possible to transfer files from/to a sftp client. The request just times out. SSH from this client is possible.
[Code]...
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Jul 1, 2011
I configured ASA 5510 with IOS 8.4.2 version. I configured SSH to outside and backup interface with any any permission.
ssh 0.0.0.0 0.0.0.0 outside
ssh 0.0.0.0 0.0.0.0 backup
configured password with command
passwd < Password>
While connecting from outside through Putty i am not able to authenticate the password.
Aftter entering user name as pix its asking password. After entering its not authenticating.
I taken output by telnetting to inside after connecting to the firewall from outside and entering username as pix
PM-ASA-5510# sh ssh sessions
SID Client IP Version Mode Encryption Hmac State Username1 122.169.252.112 2.0 IN aes256-cbc sha1 KeysExchanged pix OUT aes256-cbc sha1 KeysExchanged pixSPM-ASA-5510#
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Aug 22, 2012
Our NOC is trying to configure a site to site tunnel to one of our customers. The tunnel is up and operational, however we can't get our NAT rules to match what we want.
We are running ASA version 8.4(3)
The traffic is sourced from 172.16.1.50 (inside1) and destined to192.168.2.9 (outside), the nat configuration is posted below:
NOC-ASA5510-01# show run nat
nat (inside1,inside2) source static ng-noc-networks ng-noc-networks destination static ng-inside2-networks ng-inside2-networks
nat (inside1,outside) source static test test-EXT destination static otherside otherside
object network obj_any
nat (inside1,outside) dynamic interface dns
object network servers-noc
nat (inside1,outside) static 192.168.1.68
Here is the output from the show nat detailed:
NOC-ASA5510-01# show nat detail
Manual NAT Policies (Section 1)
I left off entry 1 but it doesnt have any translated hits either
2 (inside1) to (outside) source static test test-EXT destination static otherside otherside
translate_hits = 0, untranslate_hits = 624
Source - Origin: 172.16.1.50/32, Translated: 192.168.1.67/32
Destination - Origin:192.168.2.9/32, Translated:192.168.2.9/32
Auto NAT Policies (Section 2)
1 (inside1) to (outside) source static servers-noc 192.168.1.68
translate_hits = 0, untranslate_hits = 187
Source - Origin: 172.16.1.101/32, Translated: 192.168.1.68/32
2 (inside1) to (outside) source dynamic obj_any interface dns
translate_hits = 58417, untranslate_hits = 1511
Source - Origin: 0.0.0.0/0, Translated: 192.168.1.66/29
Here are the network objects:
object network test
host 172.16.1.50
object network test-EXT
host 192.168.1.67
[Code]...
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Nov 14, 2011
I implemented a ASA5510 with latest software version. I configured outside interface, default route, PAT to the outside interface. I am able to ping and telnet to the inside interface of the ASA.But internet is not working.Did i miss any configuration?i enabled icmp to outside,. i did a ping to the next hop from ASA. but it is not working.
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Feb 5, 2013
I find are steps to turn on SSH access. I have quite a few customers with ASA5510's installed. SSH is set up and working fine on every one. After a period of time, you are no longer able to SSH into the firewall. Using Putty, it just sits there on a blank screen without giving a "denied access" message or a login prompt. Rebooting the firewall will solve the issue and SSH access works again. Today, I had a customer with and active/standby configuration where I had to reboot both of them to be able to log in. Most of my customers are on 8.2.software as most don't want to reconfigure for the new NAT, etc.
I'm sure others have seen this before since it appears to be occuring on almost every ASA that I have access to. Is there any fix to eliminate this or is there something that can be run from the ASDM that will grant SSH access again without just doing a reboot?
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Sep 24, 2012
We have 2 ASA5510 and 2 ASA5525. Got a very weird error; up to release 8.4 eigrp works fine, after upgrading to 8.6 eigrp stops working.Can't see any neighbors; but same command from another asa on same network but with release 8.4: [code] I want to put the 5525 on production but would like to do it with latest release; could this be a bug on 8.6?
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Jun 2, 2011
we recently upgraded our ASA 5510 active/standby cluster from ASA Version 8.3.2 to 8.4.1(11). Unfortunately the standby ASA is now crashing a few seconds after the configuration was synchronized from the active ASA.
Also completely disabling HA, bringing the default config to standby ASA again and activating HA afterwards did not work. Also tried through the Wizard provided by ASDM to be sure to have no errors with requirements.
How to solve this without doing a downgrade back to 8.3.2. ?
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May 9, 2013
I have an ASA 5510 and I am building a site-to-site vpn tunnel, peer on the other end is a sonicwall. I can initiate the tunnel from my end, but when he tries from his end it fails on phase 2 with this error in the logs:
"Rejecting IPSec tunnel: no matching crypto map entry for remote proxy"
Obviously our crypto map's don't match, i have it restricted to specific ports on my end and he had it wide open on his end, but said he is not sure how to restrict it down to specific ports. My question is why would I be able to bring the tunnel up on my end if the crypto map's don't match and he can't bring it up?
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Dec 5, 2012
I have an ASA 5510 and I am building a site-to-site vpn tunnel, peer on the other end is a sonicwall. I can initiate the tunnel from my end, but when he tries from his end it fails on phase 2 with this error in the logs:
"Rejecting IPSec tunnel: no matching crypto map entry for remote proxy"
Obviously our crypto map's don't match, i have it restricted to specific ports on my end and he had it wide open on his end, but said he is not sure how to restrict it down to specific ports. My question is why would I be able to bring the tunnel up on my end if the crypto map's don't match and he can't bring it up?
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Jun 11, 2013
I have an ASA with an outside ACL that is configured to allow 208.84.248.95 SIP/5060 to 1x.x.x.46. I show no hits. I added an ACL to do a packet capture, it sees the packet coming into the ASA but not going to the Serv Prov interface. I see hits on the vuong ACL but not the production acl_out ACL.. What is up?
NOTE:ACL_out is the ACL we use to allow outside traffic to enter our network.
FW1(config)# sh access-list | i 1.x.x.46
access-list acl_out line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=0) 0xc09a9387 (*NO HITS)
access-list acl_out line 658 extended permit udp host 208.84.248.95 host 1x.x.x.46 eq sip (hitcnt=0) 0x0f327179 (NO HITS)
[code]...
It was tested and verified from the inside network to make sure the server is listening on that port. Below we created an ACL to allow all IP from another test PC to the Server IP 1x.x.x.46. We did a telnet to port 5060 and it showed hits but not on the acl_out ACL.
ccess-list vuong line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=0) 0x2759fa92
FW1(config)# q
FW1# capture capture1 access-list vuong interface outside
[code]...
Below we applied the same ACL to the ServProv interface to see if traffic was going where it was supposed to . By trying to telnet to the 1x.x.x46 IP from 63.x.x.140 IP. Looking below, no traffic appeared on the capture2.
FW1# capture capture2 access-list vuong interface ServProv
FW1# sh capture capture2
0 packet captured
0 packet shown
[code]...
Capture 1 above shows the last 3 incoming messages initiated from 63.x.x.140 to the 1x.x.x.46! Vuong ACL belows shows 3 more hits.....nothing on the acl_out ACL???
FW1# sh access-list vuong
access-list vuong; 1 elements; name hash: 0x29df3e90
access-list vuong line 1 extended permit ip host 63.x.x.140 host 1x.x.x.46 (hitcnt=6) 0x2759fa92
[code]...
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Sep 19, 2011
I've got an ASA 5510 that has been working like a charm for some time now. Until now we've not had to nat any resources to the outside. I created network objects for an internal host and an external host. The internal host has to respond to requests on tcp/2001.
The internal host has no problem accessing the internet, but when I attempt to access the internal host from the outside, I get the following:
4 Sep 20 2011 16:20:33 fw_outside_ip 62678 outside_host 2001 Deny tcp src outside:outside_host_ip/62678 dst inside_host:inside_host_ip/2001 by access-group "outside_access_in" [0x0, 0x0]
When I try to use the packet tracer to simulate the outside traffic, I get the following
5 Sep 20 2011 16:17:41 inside_host 2001 Asymmetric NAT rules matched for forward and reverse flows; Connection for tcp src outside:outside_host/1065 dst inside_int:inside_host/2001 denied due to NAT reverse path failure
I've got over my NAT statement and access rule and can't find anything wrong with either.
Here are the pertinent NAT and access rule...
static (inside_int,outside) tcp interface 2001 inside_host 2001 netmask 255.255.255.255
access-list outside_access_in extended permit tcp host outside_host host inside_host eq 2001
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Feb 5, 2012
i have here a ASA 5510 sec k9.
I build a Config with a DMZ,INSIDE and OUTSIDE Interface. My Plan is to use the IP-Address of the OUTSIDE Interface with PORT to setup a HTTP Server In the DMZ
But my Config doesn't work. And I have no Plan why .....
The Inside Interface have to work normal. The Traffic to the Internet is TRiggert from Inside with Dynamic PAT
ciscoasa(config)# exit
ciscoasa# show run
: Saved
:
ASA Version 8.4(1)
[Code].....
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Jun 23, 2011
I have ASA 5510 connected as shown in attached diagram.Ideally when ASA 1 is active and if I boot Switch-1, ASA-2 shood take over. But that is not happening.When I boot SW1 , ASA-2 shows "Failover LAN Interface: failover Ethernet0/0 (Failed - No Switchover)" and remains standby.Fail over works properly If ASA-1 boots.
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May 9, 2012
I have an ASA 5510 and have just started using object-groups which are super handy in theory, but not working in reality. I have a service object-group with a mix of tcp, icmp, and udp ports. Let's call it Sample_Port_Group. I'm trying to apply it to my dmz_access_in ACL. Here's the line giving me problems:
access-list dmz_access_in extended permit object-group Sample_Port_Group 192.168.1.1 any
The asa throws up an error between 192.168.1.1 and any. When I put up a ? after Sample_Port_Group, it gives me the option of putting in an IP address, any, etc. When I put in a ? after 192.168.1.1, it only gives me the option of putting in an IP address.URL
Those posts gave me the impression my line was possible, especially the "access-list outsideacl extended permit object-group myaclog interface inside any" line, which is at the end of the 2nd article linked.
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Aug 20, 2012
I have an ASA 5510 attached to 2 internal networks. Everything is working except communications between the 2 internal interfaces.I can ping the FW from either interface and I can ping hosts on both networks from the CLI but can't get any traffic to pass.I'd like to open the connection to all traffic. [code]
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May 8, 2012
I know that I've run into this before but I can't remember the fix. I have a 5510. The 3 interfaces involved are INSIDE, OUTSIDE, and GUEST. Corporate users are allowed to put their iPhones on the Guest network, but the problem is that their Exchange ActiveSync stops working. It is tied to the external DNS name of the OWA server (we'll say webmail.abc.com). So the users are funneled out one public IP on the OUTSIDE interface and are trying to communicate with the outside of the OWA server, which is NATed to another public IP on the same outside interface. What do I need to do on the ASA to allow users on the guest network (behind the GUEST interface) to access the mail server using its public IP (behind the INSIDE interface)
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Jun 24, 2012
After I have upgraded our ASA 5510 to 8.4.2 I have problem with the management interface.Our former firmware 8.2.3 had no problem using the management interface as a DMZ zone, but after we upgraded to 8.4.2 we can't make it work.The interface and the protocol is up, when I type: show interface.But when I ping the interface from a computer connectet to the interface, nothing happens.
Even the logging shows nothing.
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Jan 3, 2013
my Cisco ASA 5510 doesn't save the configuration to the disk.
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May 1, 2013
I have a 3945 router with two interfaces connected to my firewall, one to the management interface and another to my dmz. I'm running eigrp between all my network devices. The problem I'm running into is when I try to ssh to the management interface of the 3945 the traffice hits the firewall, then goes right to the management interface as it should, but the return traffic is trying to use the dmz interface since that is how the router knows to get back to my computers network. I created 2 route-maps to try and address this issue. [code] I've applied the MANAGE_IN route-map to all interfaces that might have inbound traffic destined for the management network and applied the MANAGE_OUT route-map to the management interface. The MANAGE_IN policy appears to be functioning correctly, the MANAGE_OUT doesn't appear to be functioning correctly. When I look at traffic from my host going to the management interface I see it still trying to return through the dmz interface.
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Feb 1, 2013
I picked up a second hand NETGEAR FS750T switch today for very little as the previous owner said it had stopped working.
After powering it up, there is a small noise for about three seconds. All the lights above the 10/100 ports are solid green and I can't access the web interface when connecting it up to my computer.
What could the problem be? I've heard others with different switch models reporting that all the lights are flashing and replacing the capacitors fixes them.
I've tried the reset and factory reset buttons. The reset just puts all the lights off for the duration of holding it and the factory reset appears to do nothing.
edit: when I turn it on, all the lights and the sound starts immediately. After two seconds, the lights go out. After three seconds, the sound stops and the lights return.
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Jul 26, 2012
We are using the newest release of AD Agent (1.0.0.32.1, built 598). The ASA Firewalls 5520 are having the software release 8.4(3)8 installed.When somebody tries to connect thru the Identity based firewalls from a citrix published desktop environment (PDI) the connection is not possible. Checking the ip-of-user mapping on the firewalls (show user-identity ip-of-user USERNAME) mostly doesn't show the mapping of the USERNAME and the PDI the user is logged in. The user-of-ip mapping of the PDIs IP-address shows mostly other users, which then are used to authenticate the acces thru the firewalls.
What is interesting, that on the AD Agent using "adacfg.exe cache list | find /i "USERNAME"" i can't see the PDIs IP-address neither because it is mapped to another user.Is Citrix Published Desktop environment supported to connect thru Identity based Firewalls? How AD Agent, Domain Controllers and Firewalls are working together? On the firewalls with "show user-identity ad-agent we see, the following:
-Authentication Port: udp/1645
-Accounting Port: udp/1646
-ASA Listening Port: udp/3799
Why Cisco does use 1645 and 1646 and not 1812 and 1813?The Listening Port is used for what purpose? we tried the AD Agent modes full- download and on-demand with the same effect.
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Mar 10, 2012
I haven't installed anything new lately, nothing that would affect the wireless, but my wireless suddenly stopped working. My wireless has been working successfully for the past 2 years no problems till now. I have a Dell Latitude E6410 my computer is running Windows 7 32bit. When I open up the DW WLAN Card Utility it says "There are currently no wireless adapters available and enabled. Please enable any available wireless adapters before accessing this configuration utility. I tried reinstalling drivers for the wireless but my computer says "no compatible hardware found".
Also the under the wireless adapters section of Device Manager there isn't an adapter for wireless, but there is an unknown device.
Here's a View at my Device Manager [URL]
I've tried to use computer restart magic but no luck there.
Also, my computer is running on a university network. My roommate's wireless is working fine. Also I've already system restored to a point where I know it was working, no luck...
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Aug 16, 2011
I'm working on setting up a site-to-site VPN connection that requires us to NAT an internal address. Typically, this would be no big deal, but for some reason, it's not working for us. The remote site is reporting that they are seeing the original IP address and not the mapped address coming across. I've monitored the connection and base on our ASA logs, I too see the un-mapped address.
Is there a quick and easy way of verifying that NAT is working? Logs, etc.?
Unfortunately I don't currently have the remote side's configuration, as they are an external business, but I can provide ours: [code]
Based on the above, it sounds as if our configs aren't jibing, which I would think could be caused by the NAT configuration not working, right? I mean if the VPN applicance on the remote end is expecting a NAT-ed address of 12.131.67.247 and they are receiving 12.10.127.108, that could cause this issue, couldn't it?
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Jul 19, 2012
I recently setup a site to site vpn between a asa 5510 and router 1921. It was working great all night and this morning. When traffic stopped rolling through for a few hours the tunnel shutdown. I checked the router using cisco configuration and tells me the tunnel is up. When I check the asa it does not show up in the active tunnels. Any know what would cuase it to drop? and if so what can I do to avoid it.
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Jun 8, 2011
i've an Cisco ASA 5510 with Security Appliance Software Version 8.0(2), in this ASA i've many L2L tunnels to this ASA, anda sometims new tunnels can't connect, the older tunnels still ok and working, yesterday this situation occured again and i've tried to clear all ipsec tunnels and try to reconnect again no one cames up again. At the time of this situation memory usage was about 78% and CPU is was around 5%. I've made a reload without changes and the situation returns to the normality.
At the time of the fail i've collect the outpu from debug crypto isakmp 255, the outpu was in the annexed file.
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Nov 30, 2011
I have a an issue with one particular VPN user. They are using the built in Windows Vista client to connect to my ASA 5510.
All other users do not have an issue and i receive the following error at roughly the same time of day when the drop happens. Authentication is done by my AD Server which handles all logins.
[code]...
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May 9, 2010
I have the ASA 5510, I just upgraded to Windows 7 and installed the ASDM software. The installation went smoothly but when I launch ASDM all that comes up is the top right of a window, here is a screenshot of what happens.
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Nov 19, 2012
Currently I want to add a second lan (vlan) in a customers network. The new network will be for a wireless infrastructure.There is also VPN Configured on the ASA - One with L2TP for Windows Clients and an IPsec for Cisco Clients.Former we only had one outside (Eth0/0) and one inside interface (Eth0/1) on the ASA.Now I want to use the Eth0/2 with subinterfaces, so that we will be flexible for future, when deploying more vlans.But now, when i turn the first subinterface Eth0/2.2 to no-shut the VPN Connections does not work any more.Bulding up the VPN connection works, but it seems that the traffic is not tunneled. (I checked this, because tracert to an internal adress goes to the internet)Below there is my config, i don't know whats wrong. I think split-tunnel is configured correctly (because it works when i delete eth0/2.2) TREV is the network of this location.Company1,2,3 are remote locations.
: Saved
:
ASA Version 8.2(5)
!
hostname XXXXXXX
domain-name domain.lan
enable password XXXXXXXXXXX encrypted
passwd XXXXXXXXXX encrypted
[code]....
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Nov 1, 2011
We have a 5510 ASA that was running 8.0 and were using it for clientless VPN access. Through this, we published bookmarks that linked to an internal Microsoft 2008R2 RemoteApps server, which users logged on to and then launched RemoteApps (basically being RDP sessions to apps on the server).All worked fine until we upgraded to 8.4 over the weekend and we now can't launch the RemoteApps. We can still login through the ASA, still click a bookmark to take us to the RemoteApps server's webpage, still then authenticate against the domain fine and still see the published apps. The problem now is when we launch the apps we get "this computer can't connect to the remote computer" messages and the app fails to launch. Nothing has changed on the RemoteApp server side, only the upgrade to 8.4.
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Jun 13, 2012
I have a Cisco ASA 5510 (with an AnyConnect Mobile License enabled) I used to be able to connect to the VPN using the AnyConnect app for Android form the Google App store (the phone is a Samsung Galaxy S II LTE, if that matters). Like I said everything used to work fine until a few weeks ago, the only change I made to the router was giving it a different external IP address (I changed ISP), I'm pretty sure it worked after that. But now when I try to connect with my Android I get this error: "Clientless (browser) SSL VPN access is not allowed".
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