Cisco Firewall :: ASA 5510 Can't Inspect And Intercept For HTTPS Traffic

Feb 23, 2011

I want to block some social networking sites using ASA 5510-CSC-SSM, As I searched and come to know that ASA 5510 can't inspect and intercept for https traffic because it is encrypted while traversing throught the ASA. I want the ASA to make functioning for https too, not only http. Can i perform this task by updating any software on existing device?

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Cisco Firewall :: Configure ASA 7.2 (4) To Inspect SCCP Traffic From A CUCM V7

Aug 11, 2010

I am trying to configure my ASA 7.2(4) to inspect SCCP traffic from a CUCM v7.I have been advised that the ASA device needs to support the version of Skinny I am running.What version of Skinny does ASA 7.2(4) support? How can I find out what version my phones are using?

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Cisco Firewall :: ASA 9.X Routed - Inspect Traffic For All L3 And Transparent Contexts

May 12, 2013

We are currently looking at design models for a Multi-Tenancy solution.The firewall layer will be 2 X ASA's running 9.X to take advantage of VPN's in multiple context mode and mixed L3 and L2 contexts.
We will be delivering services through multiple L3 contexts (between 2 and 5 L3 contexts for services) and 1 transparent context for customers infrastructure  who will then have virtual firewalls for NAT's and VPN's etc withing their own environment.
I am not very experienced with IPS so my query is; if we were to get an IPS license for both ASA's how would the IPS fit in, can we use it to inspect traffic for all the L3 contexts and the transparent context?

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Cisco Firewall :: Enable Inspect Http On ASA 5510?

Feb 15, 2012

how to enable inspect http on ASA 5510, so that  URL information  populate in the syslogs?

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Cisco Firewall :: HTTP Inspect In ASA 5510 Messes Up SVN Authentication

May 13, 2013

I have a strange problem in my ASA 5510 firewall. I turned on HTTP inspect policy to block certain URLs, but that destroyed svn communication. Interestingly, if I use simple web-browser to access svn server - it works, but any svn-client requests fail with an error "Could not read status line: An existing connection was forcibly closed by the remote host". I did some packet sniffing, and discovered that with HTTP inspect off the Webbed request is answered, but with HTTP inspect on it is rejected with an error unauthorized. Here are examples of success and failed conversation packets:

1. <Client-IP> <Server-IP> WEBDAV WEBDAV:Request, PROPFIND /svn/repos/myrepo/trunk  {HTTP:3, TCP:2, IPv4:1}
2. <Client-IP> <Server-IP> WEBDAV WEBDAV:HTTP Payload, URL: /svn/repos/myrepo/trunk  {HTTP:3, TCP:2, IPv4:1}
3. <Server-IP> <Client-IP> TCP TCP:Flags=...A...., SrcPort=HTTP(80), DstPort=58882, PayloadLen=0, Seq=4139355337, Ack=3464798063, Win=258 (scale factor 0x8) = 66048 {TCP:2, IPv4:1}
4. <Server-IP> <Client-IP> WEBDAV WEBDAV:Response, HTTP/1.1, Status: UNHANDLED HTTP Status Code, URL: /svn/repos/myrepo/trunk  {HTTP:3, TCP:2, IPv4:1}
1. <Client-IP> <Server-IP> WEBDAV WEBDAV:Request, PROPFIND /svn/repos/myrepo/trunk {HTTP:3, TCP:2, IPv4:1}
2. <Client-IP> <Server-IP> WEBDAV WEBDAV:HTTP Payload, URL: /svn/repos/myrepo/trunk {HTTP:3, TCP:2, IPv4:1}
3. <Server-IP> <Client-IP> TCP TCP:Flags=...A.R.., SrcPort=HTTP(80), DstPort=1137, PayloadLen=0, Seq=1075661931, Ack=4049054406, Win=64240 (scale factor 0x0) = 64240 {TCP:2, IPv4:1}
4. <Client-IP> <Server-IP> TCP TCP:Flags=......S., SrcPort=1138, DstPort=HTTP(80), PayloadLen=0, Seq=1032908784, Ack=0, Win=64240 ( ) = 64240 {TCP:4, IPv4:1}
5. <Server-IP> <Client-IP> TCP TCP:Flags=...A..S., SrcPort=HTTP(80), DstPort=1138, PayloadLen=0, Seq=4184445498, Ack=1032908785, Win=8192 ( Scale factor not supported ) = 8192 {TCP:4, IPv4:1}
6. <Client-IP> <Server-IP> TCP TCP:Flags=...A...., SrcPort=1138, DstPort=HTTP(80), PayloadLen=0, Seq=1032908785, Ack=4184445499, Win=64240 (scale factor 0x0) = 64240 {TCP:4, IPv4:1}
Packet # 4 is an actual differentiators.

I found one mentioning of that error with that assessment: "Older firewall/proxies do not understand the Webbed related HTTP requests for accessing Subversion using HTTP{ URL} in that post But not any useful tips.

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Cisco Firewall :: 5510 Inspect SIP Dropping Request Message Packets

Mar 17, 2011

I have 2 ASA 5510 firewalls at 2 different sites. Both running on version 8.0.4. Users are using an Instant Messaging type of application provided by a local telco here which is able to send and receive SMS using SIP (from the packet capture that I've done).
When users use the IM in site A, they are able to send and receive text messages via the IM from behind the firewall. However, when the users are in site B, users are able to send out text messages but not able to receive them.
I noticed that when I remove "inspect sip" from site-B's global policy map, users from site-B can successfully receive text messages. I have confirmed that it is the firewall that drops the packets as I have captured the inside and outside interfaces of site-B's ASA and I can see the incoming sip "request: MESSAGE" packet on the outside interface but I do not see the packet exiting the inside interface.
I have cross check both firewall configurations, and I do not see anything suspicious commands relating to sip that might cause this issue. Is there any command to troubleshoot why the sip inspection is dropping the sip packets on site-B?

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Cisco Firewall :: ASA5510 / Block HTTPS Traffic In CSC Module?

Dec 15, 2011

I am having an ASA5510 with a CSC-SSM-10 module. I am able to block http traffic through the ASA but cannot block https traffic through it. Need to block https traffic using the CSC module.

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Cisco Firewall :: ASA 5510 HTTPS Filtering Bog Down

Feb 15, 2012

I am running a Cisco ASA 5510 with Trend Micro Interscan. We have it set up to filter https except for a handful of sites. It is filtering the ones we don't want ie: facebook, and youtube. Though it is causing all other https to slow to a crawl. Therefore some sites it times out on us. What should we be looking for to change so it isn't slowing the allowed sites down?
Version numbers 
ASA - 8.4(3)
ASDM - 6.4(3)
Trend - 6.6.1125

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Cisco Firewall :: Redirect Http And Https Traffic From ASA 5520 Via Squid?

Dec 20, 2010

Right now, in my network there is no proxy server and all users go straight through the ASA to access internet. I would like to put a squid with dansguardian (for web filtering). Steps in getting all http and https traffic from ASA go via my squid?

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Cisco Firewall :: ASA 5510 / Certain HTTPS Website Timing Out

Sep 12, 2011

Running ASA 5510 with code 8.3 in it.We have our few https portal and OWA websites in HO.We access these sites from the network behind the ASA.All works perfectly fine.
In order to have control on internal network traffic we placed a web-filtering device (Fortigate) in transparent mode.To start with of we haven't blocked anything via new box but https portal and OWA stopped working from certain computers.At the same time other https sites were reachable from the same computer/s.We checked that website was tracable using traceroute from ASA,Fortigate and even from interal computer(from the one which it is not opening).This behaviour is random.

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Cisco Firewall :: ASA 5510 Filters URLs In HTTPS?

Nov 22, 2011

My company uses a pair of 5510 ASAs as the gateway to Internet. I once configured policy-map to filter certain webpages (facebook, twitter, ...etc) and they work fine. However nowdays those websites all support HTTPS. In the https the URL seems encrypted so can't do regex match... Is there anyway that I can still block those webpages?
Another two ways I can think of are

1. Block IPs (don't really want do this unless absolutely necessary)

2. Block DNS for the URL (however they can work around by setting static DNS entries)

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Cisco Firewall :: ASA 5520 To Block Https Traffic But Users Are Able To Open Website

Jul 1, 2011

We have ASA 5520 with CSC-SSM 20 and we want to block https traffic but when we are blocking https traffic http traffic going to block but user are able to open website. 

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Cisco Firewall :: ASA 5505 - HTTPS Traffic Through DMZ Interface To Internal Exchange Server?

Apr 23, 2012

I have an ASA 5505 with the base license,When I setup the DMZ interface I had to add the deny access to the inside VLAN.  The DMZ works fine with WiFi on it, but user's iPhones can't get email unless they turn WiFi off.Is there a simple way to allow HTTPS traffic through the DMZ interface to our internal Exchange server which is NAT'd on the 5505's external IP?

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Cisco Firewall :: ASA 5505 - Redirecting Http And Https Traffic To Proxy Server

Aug 5, 2008

I have an ASA 5505 that I am using to connect my contractors to via an inside interface, the outside interface is my private LAN. I have setup on our corporate Proxy server to allow traffic from my outside interface of my  ASA to go to the internet without credentials BUT log internet activity. The question is I want to know if the ASA can send that http & https traffic to my proxy server and all other traffic to my default route? I want to be able to send all internet traffic to my proxy server. This will avoid me asking the contractors to place proxy credentials in their browsers.

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Cisco Firewall :: 2851 - Unable To Filter Https Traffic With Router And Websense

May 25, 2011

I am having a setup with a 2851 router & websense url filtering server where I need to forward the traffic to websense server for all the internet requests. The http traffic is getting filtered properly, but the https traffic is not getting filtered. The two commands I ahev given for http & http are as follows: ip inspect name test http urlfilter ip inspect name test https.

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Cisco Firewall :: 5510 Block HTTPS Website Using CLI Or ASDM

May 17, 2013

I have purchased a Cisco ASA 5510 & want to block all social networking websites (https) either using CLI or ASDM.

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Cisco Firewall :: Asa 5510 Blocks HTTPS Access To Internet Websites

Jan 20, 2013

I have installed a new ASA5510 with CSC, and everything is working properly except the access to websites using https. All sites/access to them seem to be blocked by the ASA. I have read that this access is by default enabled and I have tried to add configuration to allow https access to the firewall but without success. [code]

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Cisco Firewall :: Asa 5510 / Unable To Launch And Access HTTPS To Run ASDM

Jan 17, 2013

i am unable to launch ASDM, and access https:// to run Asdm..everything worked find yesterday but now for some reason it wont work?When i am trying to log in with the asdm it just hangs on the connecting to device... please wait...When i am tryng access the https://... i get the ssl do you want to trust.. and i press proceed anyway and i get an error
Asa 5510
Device manager version 6.1
System image file is "disk0:/asa804-k8.bin
Also i am accessing the asa with ssh without any issues

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Cisco :: IP Inspect Firewall

Apr 16, 2012

ip inspect firewall should be performing no inspection on traffic traversing an IPSec VPN right?

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Cisco Firewall :: Inspect Not Working In ASA5520?

Aug 15, 2012

I have a cisco ASA5520 box running with IOS version8.2(5)13 where default policy map is applied globally. But I have not seen any traffic being inspected through included protocol defined under policy map.All configuration seems to be ok for me.
service-policy global_policy global
 Global policy:
  Service-policy: global_policy
Class-map: inspection_default
Inspect: ftp, packet 0, drop 0, reset-drop 0


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Cisco Firewall :: 5510 / DMZ To Outside Only Traffic?

Nov 28, 2011

I have a classical "inside + DMZ + outside" configuration.I also have a mail server in DMZ which have to be allowed to reach any destination on the outside (internet) at least on the SMTP port, of course.If I make an access rule that allows traffic from that server to "any", everything works fine, but doing so the server is allowed to reach any destination, including what is behind the inside interface (internal network).I didn't find any other option to tell the ASA machine to allow any destination, but on the outside interface only.I do believe is possibile to have the ASA to allow any kind of traffic from a host on the DMZ to the outside interface only, but I didn't figure out how.
P.S.: I'm using a 5510 machine running version 8.2

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Cisco Firewall :: DNS Through ASA5510 Returns Inspect-DNS-Invalid-PAK

Dec 27, 2011

ASA5510, ASA 8.0(4), ASDM 6.1(5), this is a productino ASA with plenty of lookups working through its 3 interfaces - outside, inside, dmz.  The problem is a new use.  I've segmented a switch on the inside network with a VLAN, and have a workstation routing through the switch to the default VLAN where all other hosts on the inside network reside so far.  The ASA inside interface is the default gateway for the inside network.  My test worksttion can PING inside hosts, so the static route is OK.
     ASA     DNS Server
                |                                  |

  But lookups fail, Wireshark says the test workstation sends, the dns server receives and responds, but the test workstation never receives.  I used the Packet Tracer tool, it gets to the last step syayin OK then finally "inspect-dns-invalid-pak".  I can't find any more there to tell just what is invlid about it.  So I'm trying to figure out global inspection.  Here's an extract from the config:
class-map inspection_default
match default-inspection-traffic
policy-map global_policy
class inspection_default


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Cisco Firewall :: Determining All Traffic In And Out Of ASA 5510?

May 20, 2011

Just wondering if there are any methods or commands, natively, in the asa5510 for determining all traffic in to and from a certain server passing through the asa.  This would be without a syslog server or something similar.

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Cisco Firewall :: Traffic Delay ASA 5510

Mar 11, 2013

Core Internal Network -> Cisco ASA 5510 -> DMZ Switch.If i send a ping reguest from internal network to servers in DMZ Switch over the ASA 5510, i can see a delay in response, some times this delay can be more than 80ms, this is a problem for the web applications in http traffic.How i can find what's happening on my ASA? I disable the inspect traffic over the IPS, disable the policy maps below, reload the two boxes, but doesn't works, the problem still persists. [code]

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Cisco Firewall :: ASA 5510 With 8.4.1 - Traffic Is Not Flowing

Mar 27, 2011

I'm currently using ASA 5510 with software 8.4.1 and I have an issue with nat configuration. I used the following config line:nat (inside, dmz) source dynamic LAN Pat1 destination Server1 Server1
The traffic is not flowing and when I use Packet Tracer, packets are dropped at the NAT rule with the following error: Drop-reason: (acl-drop) Flow is denied by configured rule.The only ACE I have is permit ip any any.

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Cisco Firewall :: ASA-5510 - SIP ACL Traffic Not Working

Jun 11, 2013

I have an ASA with an outside ACL that is configured to allow 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 host 1x.x.x.46 eq sip (hitcnt=0) 0x0f327179  (NO HITS)

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
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
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

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Cisco Firewall :: ASA 5510 No Traffic Flowing?

Jul 12, 2011

I have manually configured the Firewall ASA 5510 from existing PIX to match the configuration, however when I connect the firewall to the Network, no traffic is flowing in either direction. I have the Inside network on the subnet and the outside network on subnet. I am attaching the cofiguration file.

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Cisco Firewall :: 5510 Allow Traffic Inside To Outside

Nov 18, 2011

One Host on inside network needs to access customized application hosted on Internet. Its a customized application run on port 80, 443, 5000-to-50020

How do I allow this host access for this specific application. I got ASA 5510 and host is in the inside network, we also got an ACL on inside interface to have control.
-Host IP on inside network  -
-Application to access - 74.219.x.x
-Inside ACL name - inside-acl

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Cisco Firewall :: ASR 1000 ZBF Can Use Police Action In An Inspect Rule

Mar 23, 2011

I have two questions about ZBF on ASR1000 with Firewall and Flexible Packet Inspection license:
1 is IPv6 supported?

2 can I use police action in an inspect rule? I want to limit some protocols to low bandwidth. There is no police command in ZBF policy map.

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Cisco Firewall :: ASA 5510 - Scan Traffic To Public IP?

Feb 19, 2013

Im having problems with google saying we generate to much traffic to [URL]
I need to know which machines on the inside are talking so much with google. Can this be done via ASA 5510? do i need a third party program for this?

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Cisco Firewall :: ASA 5510 - Email Logging VPN Traffic

Feb 29, 2012

I use ASA 5510 and I would like to log VPN traffic ( for example, as soon as a remote user try to connect to the asa). I would like this log be send to a specific mail address. I already configure Email Logging for severity  ( level 3) and it works well.
How I can add the VPN traffic Log ?

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Cisco Firewall :: Traffic Shaping ASA 5510 Vs 5505?

Oct 19, 2011

Is there any difference with traffic shaping capability on the 5510 as opposed to the 5505? is there anything the 5510 can do that the 5505 cant? with regards to TShaping?

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Cisco Firewall :: Redirect HTTP / Ftp Traffic (ASA 5510)

Apr 25, 2011

i have the following scenario :
ISP1-------ASA 5510----------ISP2
i would like to use ISP2 for all http/https/ftp could I force my ASA to set a different gateway for http/https/ftp traffic ?i have tried several solutions such as nat/pat rules, nothing seems to work.

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