Cisco Firewall :: ASA5505 Blocking Outbound IPSec VPN Client?
Jun 20, 2011
I have a XP workstation behind my ASA that can not connect to a client's network via Cisco VPN Client using IPSec...
In the logs it shows the translation is working on 500 but the VPN Client has the error 412, that the client is not responding.
Config below
ASA Version 8.2(1)!hostname RWFW1enable password encryptedpasswd encryptednames!interface Vlan1nameif insidesecurity-level 100ip address 192.168.1.1 255.255.255.0!interface Vlan2nameif outsidesecurity-level 0ip address x.x.x.x
[Code].....
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Jan 30, 2013
I'm trying to configure a simple ACL to block smtp traffic from leaving my LAN -- basically prevent internal users from setting up internet email accounts in their email clients and sending through that smtp server. i want my Exchange server only to send smtp traffic. here's what i have:
-access-list 102 extended permit tcp host 10.10.1.29 eq smtp any eq smtp <===10.10.1.29 is Exchange
-access-list 102 extended deny tcp any eq smtp any eq smtp
-access-list 102 extended permit ip any any
-access-group 102 in interface inside
after i apply this ACL to the ASA, i am still able to send from my internet email address setup in Outlook using my "foreign" smtp server.
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Oct 14, 2012
I have a LAN with several linux boxes (Fedora 17, both 32 and 64 bits), as well a a WInXP box. All of these are connected to the same switch, which is connected to the inside port of my PIX 515.
For a few sites (mozilla.org happens to be one of them), for http access, the tcp connection is established, but the "GET" request - or anything else for that matter - will not go through the PIX (from inside to wan). I have verified this by first, using wireshark to watch the packets being sent out from the client box, then by using the trace function in the PIX to see that the packets ARE arriving at the inside interface, but ARE NOT sent out of the wan interface.
This is for the linux boxes ONLY. When I do the same thing with my WinXP box, all works: in the PIX trace, I see the packets arrive at the inside interface, and leave the wan interace. And access to these sites are okay.
(What's a bit weird, although somewhat expected, when I connect my android phone to my LAN via WiFi, it too is unable to reach those sites - but then again, android is linux, right?)
In addition to the tracing, I have narrowed this problem down by connecting a linux box directly to my DSL router, then replacing the PIX with a simple router/gateway. Both of those solutions work.
Some background:
I have been using this PIX for about 10 years now, with the same configuration (except IP addresses). Only in the last several months has this problem started to show up.
I got this pix from a dead company at a really great price (free), so I'd like to keep it, and not have to spend money on something else. I don't have any support license, and have not been able to get any software upgrades. Here is its version info:
taz(config)# sho ver
Cisco PIX Firewall Version 6.2(2)
Cisco PIX Device Manager Version 2.0(2)
Compiled on Fri 07-Jun-02 17:49 by (code)
Serial Number: 405200362 (0x1826ddea)
Running Activation Key: 0x38ac31f3 0x0630df47 0x9a77b805 0x8bc39a60
PS: Since this PIX is at its end of life, I was wondering if any of the software upgrades would be now available without a license?
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Nov 26, 2012
I am attempting to block outbound traffic for a specific PC on my LAN using the ASDM.
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Oct 2, 2012
I need to open some outbound ports in order for our CCTV company to receive alarms from our internal CCTV Machine.
The ip addresses of the company who access the CCTV are as follows:
213.130.134.56
81.130.198.97
The above are fixed IP addresses. The internal machine is on 192.168.204.170
The outbound ports that I need to open are the following:
TCP
21
23
80
5201
UDP
1025
2074
2075
I have access to the current config if needs be.
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Mar 10, 2011
I've had a Cisco ASA 5505 firewall connected to a cable modem (Virgin Media, UK) for the past 3 years. In the last 6 months or so I have noticed that the ASA would drop the outside (internet) connection intermittently, usually at least once every 1-2 weeks - the interface still shows as being up but no traffic crosses it, and computers on the inside network abruptly lose internet connectivity. Rebooting the ASA or administratively shutting down the interface and bringing it back up again would cure the problem straight away until the next time it happens.
In the last couple of days however despite nothing having been changed in the configuration the frequency of this connection drop has increased to the point where I would lose access to the internet within an hour of rebooting the ASA. It does not seem to matter whether or not there is traffic currently going out or not, inside computers just appear to suddenly lose internet connectivity.
I have tried the following without success:
1) I completely wiped the configuration (configure factory-default)
2) I changed the port the cable modem was connected to (eth0/0 -> eth0/7, changing switchport vlan accordingly)
I thought perhaps 2) had fixed it but it lasted a whole 2 hours before I woke up this morning to find that none of the internal equipment had internet access despite the fact eth0/7 was showing as up/up in ASA CLI.
This morning I manually set the eth0/7 port to "speed 10" (10Mbps, full duplex). It was previously set to be auto-negotiation (default) on both speed and duplex. As of this post it has managed to keep the outside connection up for 3 hours - but I'm not optimistic that it is fixed.
Interface counters have never shown any collisions, errors, etc - only packets input and output as expected.
Since the problem persisted across ports (eth0/0 -> eth0/7) I'm wondering whether or not the problem could either be faulty memory, or some kind of speed/duplex incompatibility between the cable modem and ASA.
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Dec 26, 2011
I’m trying to configure my ASA 5505, in order to allow my inbound and outbound mail communications. Here with this mail I’ve attached a diagram which illustrates my exact network setup along with ip addresses.
In this setup I’ve enabled port forwarding on my ADSL router (port 25 and 110) and configured the ASA accordingly, and my mail server is located inside my network.
My problem is currently I can send mails from my inside network to outside but my not receiving any mails which originate from outside. I’ve attached my current ASA configuration as well,
C:UsersSuthakarDocumentsOffice_DocsThakralABC Computers
Final config on ASA5505
host name Cisco
enable password 8Ry2YjIyt7RRXU24 encrypted
password 2KFQnbNIdI.2KYOU encrypted
names
!interface Vlan1
nameif inside
security-level 100
ip address 192.168.155.201 255.255.255.0
[Code] ......
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Sep 28, 2011
We have two sites connect with an IPSec L2L VPN.
-Site A: 192.168.13.0/24
-Site B: 192.168.2.0/24
On both sites we have a ASA5505(Base license) to terminate the tunnel.On Site B we also got a remote access vpn to which we can connect using the vpn client.The lan2lan tunnel works fine and so the remote access vpn.Now i want to connect to Site A using my vpn client connected to Site B. [code] There are no vpn-filters or other special policys in place..If tried to ping from my vpn client to Site A while i was debugging ipsec 255 on site B: the asa matched the l2l-tunnel for traffic sourced from 192.168.25.x to 192.168.13.x but when im doing a show crypto ipsec sa detail there are no packets getting encrypted..so of course no packets reaching my asa on site a.
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Jul 7, 2012
I have ASA 5505 running 7.2.4, I want to prevent users accessing some web sites such as facebook , youtube and hotmail etc.
Which ASA 5505 IOS version should I use to block web access?
I don't want to isntall a dedicated filtering server ( websense etc) , I just want to block web sites statically on ASA 5505 via ASDM as I only have few sites to block.
know if ASA 5505 can do URL filtering, and what IOS is required ?
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Apr 1, 2013
I'm trying to troubleshoot an ASA5505.
The original goal was to block "Mumble/Murmur" (a voip app) traffic, which runs on TCP/UDP 64738, both inbound and outbound, except to a certain host (63.223.117.170).
However, when nothing I tried seemed to make a difference, just to troubleshoot, I decided to try blocking all inbound traffic. I first disconnected ethernet port 0/0 to ensure that it was cabled correctly and the outside interface went down when I did. That worked as expected, so I confirmed I had the right interface and it was cabled correctly.
I then applied a "any any deny ip" rule as the first element in the outside interface access_list, as you can see below. However, it appears to have had no real effect and the hit count is very low (it should be astronomical).
show ver
Cisco Adaptive Security Appliance Software Version 9.0(2)
Device Manager Version 7.1(2)
Compiled on Thu 21-Feb-13 13:10 by builders
System image file is "disk0:/asa902-k8.bin"
[Code].....
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Dec 6, 2012
data centre hosted system with 4 servers connected to a CISCO ASA5505, everything was working fine with 4x windows server 2003 machines but since pulling 2 out and replacing them with windows server 2008 machines i get a flood of the error below and it blocks communications back to the IP listed which is the domain controller so naturally this makes the 2 new servers unusable.
1: they are all connected to the inside VLAN directly via the ASA's switch ports.
2: the are all in the same 255.255.255.0 subnet including the ASA inside interface
3: removing the gateway on the affected machines makes no difference the ASA continues to block it which indicates whether or not the machines use the asa as a gateway its inspecting the traffic and blocking. [code]
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Oct 25, 2012
I have a cisco ASA5505, it runs a wide site to site VPN network and has 4 servers connected to it
10.50.15.4 > fileserver
10.50.15.5 > domain controller (exchange)
10.50.15.6 > terminal server
10.50.15.7 > terminal server
Now yesterday i removed 10.50.15.6 and replaced it with a new terminal server with the same ip address, ever since the ASA is blocking traffic between it and the domain controller (example)
2Oct 27 201214:51:0510600710.50.15.655978DNSDeny inbound UDP from 10.50.15.6/55978 to 10.50.15.5/53 due to DNS Query What has me baffled is the only thing different between today and yesterday is the new server is windows server 2008 and the old one was windows server 2003. The new server has the same LAN ip address as the old one to make the changeover seamless for the users.
why all the sudden my ASA has decided to block the traffic between those machines? all the other machines can talk to it fine just not the domain controller, and seeing that this is a terminal server naturally you can see the problem i face!
this router has worked flawlessly for 2 years now without any config changes and i cant work out why its blocking traffic between those 2 machines.
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Oct 31, 2012
I thought I had the configuration to allow bi-directional traffic for my Blackberry server. I have a second fw with the same config and it worked on that one. But right now, my blackberry server is down, and all the users are upset.
ASA Version 8.2(2)
!
hostname asa5505
[Code]......
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Jul 10, 2012
We have a scenario where the Cisco ASA 5505 will be one end of a site-to-site VPN. The same ASA 5505 also allows Client VPN connection. The question is around IP pooling. If I assign a pool of IP's (192.168.1.20 - 192.168.1.30) for Client VPN connections - do I need to be sure that those same IP's are not used on the other side of site-to-site VPN ?
There could be PC's/Servers running 192.168.1.0/24 on the other side of site-to-site VPN. Would this cause an address conflict ?
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Feb 26, 2013
I'm a CIsco ISR, Setting up my first ASA, which seems to be going well.I've setup an IPSEC VPN to a non Cisco device. And have connectivity between devices in each subnet.
-Subnet A - non Cisco - 10.10.13.0/24
-Subnet B - ASA 5505 - 192.168.2.0/24 (ASA is .254)
From Subnet A I can ping every device except the ASA on .254.
Edited Config attached, IP's changed for privacy, passwords removed.Let me know if I've removed too much of the config.
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Jan 20, 2013
I'm trying to make a very plain and simple network with the ASA 5505, I've strated from scratch over a dozen times triyng to find where I'm going wrong. My main goal is to simply create an IPSec VPN connection to my ASA 5505 and simply ping and connect to devices with the "inside network", so far I can easily create and establish a IPSec VPN Connection, but up to this point, I cannot successfully ping or access a single device on the ASA 5505 inside network.I've taken, create the IPSec profile with the ASDM wizard, add exemption for the VPN IP Pool, add access-list from this Cisco link, url...All this and I can't make a single connection to the inside network. [code]
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May 28, 2012
We have an internal DNS server that all internal hosts do lookups to .. these requests are forwarded onto open dns for anything the dns server isnt authoritative for.. My question is we have purchased the botnet filter and this requires the asa5505 dns client to be active on at least one interface .. Should i point the asa dns to an external IP such as 8.8.8.8 and apply DNS enabled on interface outside ( am using asdm) I don't want the ASA to control DNS for our internal clients we already have a internal server for this, i DO want the asa5505 to check dns packets against its botnet filter, whilst still using open dns for forwarding.
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Jul 28, 2011
I have the below configuration for a cisco asa 5505. There is a ADSL router in front of the ASA which has a static IP. I set up a remote-access VPN (using the wizard), but I cannot connect to the ASA firewall as the attached VPN client log shows. My only concern is that there might be something missing, ie a static route that goes to the inside interface. [code]
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Oct 29, 2012
I ve configures an asa 5505 for remote vpn with anyconnect. it works just fíne - from remote i can ping the Clients and Server inside, i can do RDP or Connect via SSH to any machine, map some volumes local and so on but: I can not connect microsoft sql server. It uses port 1433 for the first connect and establishes then a dynamic connection. So i am a Newbie - what rules or configs do i miss?
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Sep 19, 2011
I was wondering if it is needed to license the IPsec VPN clients in the ASA5500 firewalls...I know that you have license the SSL VPN peers (AnyConnect). I am almost sure that for the IPsec you don't have to.
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Jun 15, 2011
I am trying to implement IPSec Authenticated Firewall Bypass on windows vista clients within my microsoft domain to avoid implementing numerous windows firewall port exceptions for each client.
This is working internally on our network, between services servers (i.e AV server), and desktop clients. However i am having a problem when the clients are remotly accessing the domain via the VPN client.I have open traffic ports (IKE-UDP500, ESP - IP Prot 50, AH - IP Prot 51) bidirectionally between the remote vpn clients subnet and the services servers, however when the endpoints initiate traffic to the services server, the IKE traffic is unencrypted?
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May 4, 2011
ASA-5-305013: Asymmetric NAT rules matched for forward and reverse flows; Connection for icmp src outside:192.168.13.50 dst DMZ2:192.168.13.15 (type 8, code 0) denied due to NAT reverse path failure
Cant seem to get around this one yet. I have a remote ASA that I can VPN into. It has 2 dmz's, outside and inside interface configured.
Inside subnet is 192.168.11.0 / 24
DMZ2 is 192.168.13.0 / 24
VPN client pool is 192.168.15.0 /24
I login in fine. But have no access to the DMZ2 subnet. I get the failure listed above.
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Mar 6, 2011
We have ASA5500's deployed for remote access concentration.We use Cisco IPsec vpn client with a group policy the chacks for Network ICE BlackIce ersonal firewall.The powers-that-be wish to change to McAfee presonal Firewall ok..Now the Group Policy allows you to check for several pre- configured Firewalls, Cisco Integrated, Sygate, Zone Labs etc.So as McAfee are no listed then I am to assume we go for "Custom Firewall" and this is where I am struggling.To configure checking for a Custom Firewall I must have the Vendor ID and the Product ID.McAfee haven't the faintest idea what we're talking about when we ask them for these details.Or is there a way to extract them from the registry of a machine with the McAfee product installed?
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Nov 21, 2011
I have a Linksys E2500 Firmware Version: 1.0.03 and am using the "IPSec Passthrough" for work. On a typical day I'll sign in to my work's VPN, do my work, sign off in the evening, and read my personal email with a direct connection to the internet.
Then on the next morning, I am unable to connect to work until I go to http://192.168.1.1/index.asp and click "reboot." And as soon as the modem finishes rebooting, my laptop can connect to work. I've tried this several days in a row now, and indeed all I need to do to get the VPN passthrough working is rebooting the modem.
Nothing under "Applications & Gaming" is set. I've seen some posts about having a trigger on UDP port 500, but I'm not quite sure how to translate it for the E2500. Plus I'd rather the router "just work" day after day for VPN and everything else, like my old router did! Is there some other setting to try or clearer directions for a bulletproof IPSec passthrough on that unit?
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Jun 17, 2012
Can I have two IPSec tunnels over two different Internet links to two different destination?
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Jul 25, 2011
I have set up a IPsec L2L VPN between a ASA5510 and a ASA5505 which is working just fine.Every now and then our management station receives the following syslog message: Session disconnected. Session Type: IPsec, Duration: 2h:23m:23s, Bytes xmt: 3283338, Bytes rcv: 8637607, Reason: Phase 2 Error.I have already searched the forum for this message to exclude all the possible reasons for this message:
- the complete crypto maps are the same on both ends (lifetime, psk, pfs etc)
- the ACL's used in the crypto maps are exactly the opposite of each other
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Jun 10, 2013
I currently have my 5505 setup for AnyConnect SSL VPN connections. Is it possible to also configure the 5505 for IPSec VPN connections? So, essentially my ASA will be capable of running SSL and IPSec VPN tunnels, concurrently.
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Sep 18, 2011
I have problem with dual ISP + IPSEC on my cisco ASA5505 sec plus licence.Routing is working correct (connect to Internet from siteA is working trought 1st also second ISP) but IPSEC is working just trought the first ISP! It seemt that phase 1 and 2 of IPSEC is correct but packets are just encrypting but not decrypting.
I'm trying ping from siteA (PC - 10.4.1.66) to siteB (PC - 10.3.128.50)
config site A:
##########################################################################
ASA5505 Version 8.2(1)
interface Vlan1
nameif inside
security-level 100
ip address 10.4.1.65 255.255.255.248
!
interface Vlan2
[code]....
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May 28, 2012
I've had this router for years. I have 2 servers always on, 1 computer with skype, and a 2nd linux machine with ports SSH, bittorrent, and SFTP open. Nearly all the port forwards are assigned to support this.
I got a brand new desktop with lots of CPU/Ram and was using it for development. The network card kept "going out" I would be online and all of a sudden no connections would go out from it.As I tested and diagnosed it I found it still got and held a valid IP, received DNS, but no HTTP or FTP connections would work externally. If I tried to HTTP or FTP to any computer locally on the network it would work fine. But try to access the internet and it was nothing. Restaring the machine would solve it but only for a while, usually run normally for 10-15 minutes then lose network again.. re-installed the drivers, the OS, but the problem remained. I shelfed the unit figuring it was an internal problem with the desktop since it was the only machine.Recently I got a refurbished laptop. to my surprise, it began doing the same thing as soon as I used it! exact same symptoms. So I pulled the old desktop out and it runs completely fine now! the problem has 'transfered' from the desktop to the laptop so I now believe its the router. The router does it to both wired and wireless devices, and seems to target one device at a time to be bitchy to. Allows them to run for a while and then blocks all outgoing port 80/443/21 from that device.
Firmware Version: v2.0.03 Because of DNS issues with the modem the static DNS is transfered directly to my service providers DNS machine NAT enabled, all other advanced routing disabledSPI is onall Internet filters are on, all Web filters are off on FirewallVPN functions disabledAccess Restrictions are offAll Single Port Forwarding slots are directed to 2 machines (which have no problems)No port range triggeringno DMZ or priorities set on QoS
Everything that I know to check for (security, filters, restrictions) are showing errors or something that might cause this. I believe it may be related to the IP expiring, and when the IP renews the router stops permitting its traffic outbound.
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Aug 9, 2012
I'm having trouble configuring an ASA5505 on version 8.31 code for an IPSec tunnel. I've done this multiple times on 8.2.5 but can't seem to get my tunnel to even attempt to come up on this ASA. Not sure if it's relevent or not, but this remote ASA has never been used for another VPN tunnel before. When I attempt to ping a host on the other side of my tunnel, I just see the following: 8108# sho crypto isa sa
There are no isakmp sas
My local network is 10.1.1.X/24 and my remote peer network contains 66.37.227.X/24. I've been working on this for the better part of the day and would love to get it resolved.
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Mar 2, 2012
I am having all sorts of trouble connecting a Cisco RVS4000 to a Cisco ASA5505 over IPSec... I have used the "site to site" vpn wizard, I have a fress "factory reset" on my asa 5505...
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Feb 20, 2008
Just bought myself an ASA5505 to replace a PIX 501, and having transferred over most of the previous config I've managed to get the two IPSEC VPN tunnels working as before.
Unfortunately when I try and SSH to the ASA the connection just resets instantly even when the tunnel is up. It seems as if the ASA is actively refusing the connection, though the log doesn't state this. I had always presumed that traffic over an established IPSEC tunnel was implicitly trusted and not subject to usual access-list rules.
I am unable to SSH to the ASA from the 10.0.0.x range, but I can SSH to a machine on 10.27.0.4 (so I know the tunnel is up and working)
Config (minus irrelevant sensitive information) is attached for reference.
Also - though I'm not sure how relevant it is given the tunnels appear to work - when I enter the line "crypto map meepnet-map interface outside" in config mode the ASA reports "WARNING: The crypto map entry is incomplete!" even though I have supplied the access-list, peer and transform-set variables.
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Jun 18, 2012
I'm having problems configuring an IPSEC VPN between an SRP521 with a dynamic IP and a ASA5505 with a static IP. Static to Static is fine between these devices and I can configure that without problems. Dynamic to Static however.
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