Cisco VPN :: ASA-5520 / Packet Capture At VPN Entry (and Exit)
Oct 20, 2011
I would like to capture packets which are going through an IPSEC tunnel. The packets originate in the appliance (syslog) and are sent to the remote via a VPN. I can see the encapsulated packets going out to the peer and I can see the ISAKMP packets to and from the peer. Because the packets originate within the appliance, they do not appear on any interface to be captured.
Is there some way to capture these packets before they are encapsulated?I attempted to capture packets on the asa-dataplane, but they are in a format that I cannot decode, and I cannot put a filter on the capture.
Hardware is ASA-5520
Software is version 8.3(2)
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Oct 1, 2012
when performing packet capture in a FWSM
[code]...
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Oct 30, 2012
I'm trying to use EPC on ASR1001 running IOS-XE 3.4, and it won't work. Configuration commands are accepted by the router, but there are no packets in the capture buffer.In release notes for IOS-XE, in the 2.5 section, there is a statement that EPC is not supported on ASR1k. Is it true also for newer versions of IOS-XR?
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Feb 5, 2012
I have a need to capture traffic on an ASR 1001 subinterface, but what I have found is that the Embedded Packet Capture feature is not supported on this platform. Are there any simple alternatives to capture egress traffic on a subinterface or am I SOL? This is a walk in the park on normal IOS routers...
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Oct 24, 2011
I have a piece of software that I suspect is sending unwanted data over the internet to some IP address. I'm not an expert in anything related to computer networks, but I figure I could use such software after playing around a little with it.What application could I use that would so the following:
a) capture all the bytes the application is trying to send out so that it seems to the application it is doing it and see the place it was trying to send it
b) after inspecting the data, if it was ok, send the packages to wherever it was supposed to go so that it seems the original application sent.
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Nov 27, 2012
I want to capture packet on gi0/0 of PE1 in order to show customer that all his traffic is encapsulated and transmitted by L2VPN (ldp signaling) in his lab.
CE1-----------(g0/1)PE1(g0/0)------------PE2-----------CE2
PE1 and PE2 are Cisco3945 and L2VPN is working well. I tried cisco RITE(Router IP Traffic Export Packet Capture) feature, but the output was not what I expected. I tried both export mode and capture mode. Only LDP hello message I got, looks like RITE is only interested in IP packet. Monitor session wasn't effective as well because it is not a switch.
Is there any other way/workaround to capture customer's traffic encapsulated in L2VPN?
What I did on PE1 when I was trying RITE export mode:
ip traffic-export profile test
bidirectional
[Code].....
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Apr 1, 2013
I operate between c6509-E, what did you flooding? its just packet capture gi1/3 but i dont know it and is it attack?also same seq no switch gots it?what is problem?
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Jan 15, 2012
how to capture the incoming and outgoing packets on the balancer?The load balancer is connected in between the customer DCN and cisco switches 2960.The reason of capturing both incoming and outgoing packets on the balancer is to prove to our customer that there is no packet loss issue on the balancer, and it could be some issue on their DCN network.Since it is a production server, I will need to ensure that there is no impact to the incoming and outgoing traffic on the balancer and other networking equipments as well.
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Aug 8, 2012
I want to make packet sniffer which capture the IP packet and then extracting QOS filed from it's header
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Jul 26, 2012
I have always done my port monitoring (SPAN) on Cisco layer 3 switches with no issues. This time I am trying to do this on a Cisco 2901 router:
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.1(4)M2, RELEASE SOFTWARE (fc1)
System image file is "flash0:c2900-universalk9-mz.SPA.151-4.M2.bin
I need to have the source port gig0/0 and destination port gig0/1. There is something about the gig port enumeration (slot/port#) that makes the command rejected. It is self explanatory:
#sh ip int brie
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/0 xxx.xxx.xxx.xxx YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM up up
Serial0/0/0:0 unassigned YES unset up up
[code]....
It doesn't matter what slot or port number I use, it is always rejected. The command is rejected for Both destination and source gig interfaces. I tried a wide variety of slot/port numbers. To my best understanding the complete port names are: GigabitEthernet0/0 and GigabitEthernet0/1, so why does it think there has to be another digit after 0/0 or 0/1? Does it have anything to do with the Embedded-Service-Engine0/0 being administratively down?
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Aug 2, 2011
ATT notified my company we have a virus infected pc on one our networks which sits behind a Cisco ASA 5505 running 7.2(4). The set up is a basic inside/outside NAT configuration. They gave us the destination ip address and port which the our pc is contacting. I have been tasked to track down the infected pc. I created the following access-list and applied to the inside interface:
access-list VIRUS extended permit TCP ANY host x.x.x.x EQ YYYYY log debugging interval 600 access-group VIRUS in interface inside
I enable logging to the console whose output did not list the IP address of the infected pc, only the ip address of the DNS servers we were using. I then used the following capture commands to try locate the internal ip address of the infected pc:
capture in-cap interface inside access-list VIRUS-CAP buffer 1000000 packet 1522 capture in-cap access-list VIRUS-CAP interface inside
Neither step worked and the resulting console output overwhelmed the firewall in a very short period of time. Before attempting this task again, I would like to know if I am going about this the right way or if there is a better methodology?
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Dec 9, 2012
I recently upgraded my 5520 to 9.0.1 IOS. Today I tried to apply a capture to my inside interface referencing a simple ACL and I get this error.
ERROR: Capture doesn't support access-list <capin> containing mixed policies
I also created a capture for the outside interface with a similar ACL and it worked just fine. I can't seem to find anything on the web that gives me a clue to resolving the error above.
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Feb 8, 2012
Got a classical remote access vpn with Cisco VPN Client and ASA-5520, Some weeks ago I noticed in my ASA logs this severity 5 Message. Group = xyz, Username = abc, IP = 84.n.n.n, Duplicate Phase 2 packet detected. No last packet to retransmit. This message comes with every connect, but then connections works fine.
Remark: See ASA ADSM:
- 1. Duplicated Phase II (!!)
- 2. Phase I
- 3. Phase II
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Mar 3, 2013
I have a 5520 in production at a customer's site between an outside 802.11 network and an inside server. The server can get to outside hosts OK, and the traffic is being NATed properly, and sockets initiated by the server on the inside can pass data both ways, but I need to allow outside hosts the ability to send 'announcement' UDP packets to the inside server. I thought this might be an outside-NAT-required issue to get the traffic routed, but I need the inside server to see the actual outside host source IP in the UDP packet, so I basically set the outside host up similar to the inside host, just without the NAT table on the firewall -- it's subnet is outside the destination (inside server) subnet, and its gateway is the outside interface of the ASA, the same way the inside server is able to get to hosts outside. The firewall should just route the packet with a destination of the inside subnet once it sees that it hits a 'permit' ACL.
I have the appropriate ACL's set up, and when I do 'show access-list' I see policy hits for the 'permit' statements where the outside host is generating the announcement and it's hitting the ACL. I even duplicated the ACL into list 101 and 102, and applied 101 for inbound traffic on the outside int, and applied 102 for outbound traffic on the inside int, and I'm seeing policy hits on both permit statements outside and inside, so it looks like the traffic is being passed on to the inside interface and permitted, but the server isn't seeing the packets.
I can ping the outside interface from the outside, but cannot ping the inside interface or any inside hosts from the outside, even though I have 'permit icmp any any' enabled on the ACL on both ints. When I remove the firewall and put the outside clients on the same subnet, the server sees the packets just fine.
I set up the same scenario in my lab with an ASA 5505, with the same results. Below is the running config from the 5505 in the lab. The production firewall is running a slightly older version of ASA, so I made the configuration as basic as possible on the 5505 to match the config in the field:
: Saved
:
ASA Version 8.3(1)
!
hostname ciscoasa
enable password Guh9Xxhb9mcC8lV1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Vlan2
description Outside WAN Interface
nameif outside
security-level 0
ip address 192.168.10.1 255.255.255.0
!
interface Vlan3
description Inside LAN Interface
nameif inside(code)
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Jun 12, 2012
I have a Cisco 3560 using ipbasek9 with IP routing enabled for inter VLAN Routing, to exit my network and hit the outside world I have a Cisco RSV 4000 in Gateway mode. I have a number of VLANs set-up but the only one that can access the Internet is the one on the same VLAN as the Router, below is my part of my Switch configuration.
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Sep 30, 2011
I have extension mobility configured and working fine. Except that when you log into the phone, the phone does not exit back to the main display. To get back you either need to exit out of the menus by pressing exit a few times or press the globe / web button on the phone.
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Mar 25, 2013
I'm not sure if it's different when you log in remotely via mydlink, but by using the web based interface localy (by ip address) I can't find a way of exiting full screen option under live view. I tried the obvious escape button. Right-clicking does nothing, and double clicking actually makes it truly fullscreen (aspect ratio gets stretched to my monitor 16:9 btw, instead of retaining 4:3.So is there a way to exit? Using chrome, maybe it's a chrome issue and it works differently in other browsers but I see no mention in the manual of exiting fullscreen.
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Jan 26, 2012
i'm already has one internet connection is connecting directly to the Core Switch 6509,Vlan 500 (1921.168.1.0) and the Switch is route any internet request with default route:
SW6509-conf)# ip route 0.0.0.0 0.0.0.0 10.170.10.10
10.170.10.10 is --> Next hop for the DSL router internal IP, and it's working fine.
The Problem: We have a new internet connection with new Vlan 600 (172.16.1.0) another ISP/ with another DSL router, so i need your kindly support and suggest how to connect both of them to exit from the Core Switch 6509. is it ok if i make another default route to the Next hop to the new DSL router as:
SW6509-conf)# ip route 0.0.0.0 0.0.0.0 10.80.10.10
10.80.10.10 is --> Next hop for the new DSL router internal IP.
is there any way like default route , route-map or any other features to :
route Vlan 500 (192.168.1.0) to exit from DSL 1 --> 10.170.10.10
route Vlan 600 (172.16.1.0) to exit from DSL 2 --> 10.80.10.10
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Jan 3, 2009
My Compaq Presario V3015's Internal Wireless Adapter has died so I recently bought an Linksys Expresscard WEC600N to replace it. After installing the software (The Linksys monitor) everything on the program is grayed out except for "exit" which closes the program. After looking at device manager, the adapter isn't even listed their. For some reason, even when just plugging the adapter in after an uninstallation of the software and a restart of the computer, the device never gets detected even when it is clearly on (two blue lights for Power and Link/act). I've tried switching to Windows Wireless Zero connection but under network adapters, it doesn't even show a wireless option, just an LAN one. I'm pretty sure its not so much a hardware issue as it is a software one. Everything works fine except for anything related to wireless capabilities on this laptop.
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Oct 12, 2011
Well I accidentally put the router in bridge mode. It's a e1200 or 2500 I'm not exactly sure. But I was wondering how I can get it out? I can't access the web interface at 192.168.1.1 however I can access my modem's interface at 192.168.254.254.
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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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Jan 10, 2011
While troubleshooting high cpu due to interrupts on platforms like 6500 or 7600 we can capture the packets getting punted to the CPU using netdr or on 4500 I think we can even use monitor session. But is there a way where we can capture/sniff packets reaching the CPU on a 7206vxr with NPE-G2?
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Jul 18, 2011
Any reasonably priced PCI express card for TV capture (I need to see my wireless security cams. OS is Windows 7 Professional Pro.
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Jul 26, 2011
I have a router with a desktop computer connected to it and a laptop and other devices like psp's, tablets etc. How can i capture the packets that the psp or the tablet sents through the router from my desktop? Is there a program or something. Programs that captures packets usually does it from one computer ie the computer that is running the program. I need to capture all packets that goes through the wireless router. How?
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Sep 3, 2012
Enabling IP Accounting or capture packets in Cisco ASA 5510 ( 8.2 ).
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Jul 25, 2010
I've got a client with a WLC 4400 series and WCS that wants to setup a public guest wireless access network. They want to have the users put in their email address to authenticate and they want to capture the email addresses to use for marketing campaigns. I know you can setup the login page to have them put in their email address, but i can't remember if you have to use an external web server to actually capture and record the email addresses.
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Mar 4, 2013
I have a WLC 2500 which I would like to configure with guest access. I want to set up a web passthrough with email input. Is it possible to collect the email address information? Is it stored somewhere in the controller or do I need some external server?
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Aug 23, 2011
How can I configure my LMS 4.0 to capture syslog from network devices?
On the LMS CiscoWorks Portal, Syslog Alert window shows "No data is available".
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Apr 25, 2011
We are trying to sniff traffic in one of our routers 2811 IOS 12.4(3f) capturing data into the flash memory and tftp later to one of our servers. We had followed the command procedure as it is indicate in Router IP Traffic Export Packet Capture Enhancements doc but it seems that the mode capture option is not alllowed in my router. My question is Why? I had read the doc and the hardware and software should support this feature.
ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE (fc1)
yourname uptime is 2 weeks, 4 days, 22 hours, 14 minutesSystem returned to ROM by power-onSystem image file is "flash:c2800nm-ipbase-mz.124-3f.bin"
Cisco 2811 (revision 53.51) with 251904K/10240K bytes of memory.Processor board ID FCZ104174196 FastEthernet interfacesDRAM configuration is 64 bits wide with parity enabled.239K bytes of non-volatile configuration memory.62720K bytes of ATA CompactFlash (Read/Write)
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Feb 13, 2012
I have a Cisco 857 which seems to be dropping connection on its public interface.I would like to see the logs of the ppp or something which may identify the problem of why the device has lots its connection.
I know what you can setup logs for a specific IP, but it is possible to setup logs for debug messages?Also what other logs would identify the problem?
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Aug 1, 2012
Is there a way to configure a VACL capture on 3560-x, we need more than 2 SPAN sessions. Feature navigator indicates that this feature is supported but it seems like it's not implemented in the IOS yet.
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Feb 11, 2013
I have an ASA 5505 and I setup a port with a PC connected to monitor the LAN interface. I see all the traffic from the LAN going out and traffic coming back in no problem. What I do not see the the AOL Instant Messenger traffic at all. I have WireShark on the PC and I filter for AIM traffic and I see nothing.
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Mar 5, 2013
I have an HTTPS probe that sometime fail, sometimes does not fail.
[code]....
The probe that sometimes fails is the TEST-HTTPS. The TCP_443 probe works perfectly well.The ACE is configured in bridge mode.Is it possible to capture the PROBE traffic on the ACE side?
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