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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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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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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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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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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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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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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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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Apr 25, 2012
We currently have one Cisco ASA 5510 firewall at our mailn office. Our firewall does not let users access the internet. We currently have a web proxy that lets users access this. I need to let users access one website through the firewall without going through the firewall. I believe this is possible if I use dynamic NAT.
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Jul 7, 2011
There are anonymous VPN services that let you hide your real IP address from the websites you visit.But can you host an HTTPS website from behind a VPN so that nobody knows your real IP address?
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Oct 15, 2011
Our client tried to a download a real time generated file from a website, the generation process around 5 mins, after 5 mins, the file will be started to download
When my client direct connect to internet, the file can be download successfully, but when pass through the ASA 5510 and using the internal IP address, a message something like "Are you sure want to logout from this web page?" appears in Safari after 5 mins, i think the time of the error message appear when a "you can start to download" message send from the server to client, the page session timeout so that make the user cannot download the file from internet as the session is not vaild.
I couldn't find any timeout setting in "show runn", is it possible the setting in ASDM? how can I find it and configure it?
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Mar 21, 2012
Iv tried about everything you can find when you google things about not being able to access a particular website but none work checking out all security settings, deleting all cache, disabling security, checking date and time, flushdns, use opendns, try other devices (not one device in my household can get to https pages on this one site), making sure root certificates are updated, bypassing router, unplugging internet and router to ''reset'', trouble shooting with isp, website, ssl issuer, other wildblue users, other website users, other tech forum, checking for virus and malware and I'm sure there's more that I can't recall at the moment. I am not the only user of this website with a problem and all us having a problem have satellite internet (different providers), however not everyone with my satellite internet (wildblue thru dishnetwork) has this problem as I have asked here...some do some don't Wildblue ''blocking'' a website's ssl? - WildBlueWorld.com Forums
I can go to the website toontown.com but I can not access any pages that are ''secure'' or https. Can't login and using satellite internet?
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May 25, 2011
I have a self signed certificate on an ACS 4.2 Windows machine. I open a browser port to https://ipaddress:2002 of the acs and get the certificate error message as expected. When I proceed to the site then check the certificate via the shield on the top of the browser it shows is issued to ACSCOSC216_7. I install the certificate via the IE certificate import wizard.I then connect to the acs via the poper fqdn at [URL] login with my account but now get;The website declined to show this webpage.
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May 28, 2012
I have a cisco asa 5505 firewall. Is it possible to block secure websites in it like [URL]? I have already tried regular expression filtering but it filters only http traffic.
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Mar 4, 2013
I am getting some problem with ASA WebVPN browser, in some website I cannot show links or part of the page. Is there some applet java that i cannot import in "client-server plug-ins"? I've found only java plug-in for remote access.
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Mar 18, 2013
One of our customers has an ASA5510 with CSC SSM-10 security module. The software version of the module is 6.6.1125.0.Is it possible to do https filtering with this module ? The customer is complaining that this is not possible...from Cisco I've read the following:
• HTTPS Filtering
– Able to allow or block HTTPS traffic.
– Supports group-based and user-based HTTPS policies.
– Includes URL blocking/URL exception list support for HTTPS domains.
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Jan 6, 2011
I'm trying to access my ASA 5505 by https://192.168.1.1 but I can't. I'm using Windows 7. I already have installed ASDM and I can enter in the box by ASDM. I am preparing to reformat my PC and I'm afraid that I won't be able to access my ASA if I do.
The Mozilla show the message: An error occurred during a connection to 192.168.1.1.Cannot communicate securely with peer: no common encryption algorithm(s).(Error code: ssl_error_no_cypher_overlap)
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Dec 21, 2011
Windows IIS server configured behind a Cisco ASA 5540 listening on port 443 currently. Access-list and static translation configured. I have been ask to redirect all port 80 calls to port 443 for this web site only at the firewall. I have suggested moving it behind our content switch with negative results. Can we do this at the firewall level? how to accomplish the redirect for a single site. 8.2.4 is current code
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Nov 27, 2012
I am setting up an ASA 5550 8.4 and asdm 6.4. Last thing I am missing is to get the static nat rule done for https. Done it with asdm and cli and always end up with "error: nat unable to reserve the port". Looked around the Net so far and changed the http enable port to 4433. ASDM access is only configured for inside and mgmt port. Disabled under RA VPN all checkboxes in clientless ssl and any connection profiles since IKEv1 is used for vpn access.
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Jan 5, 2012
We have an ASA5505 UL bundel, updated with this license "L-ASA5505-SEC-PL=" to enable traffic from DMZ to Inside. No NAT or rules deployed for that yet.
On the Inside we have Exchange 2007 in a single server installation. The public url for smtp, ActiveSync, OWA and Outlook Anywhere is mail.company.se. There is a static NAT for outside traffic to access above mentioned services on inside. Now, on DMZ there is the WLAN for guests to access the Internet. How ever, our Smart Phones with WLAN turned on, cannot sync to the Exchange Server on the Inside! The DMZ gets IP-addressen from ASA on DMZ Interface with external DNS configured. How can I configure the ASA to achieve the function of ActiveSync from DMZ to Inside with the public URL from the phones?
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Jun 28, 2011
I upgraded MY ASA IOS with 8.4.2 and CSC IOS with 6.6.1125.0 .
Then after HTTPS filtering fine with Firefox broswer but not with IE.
In URL blocking window i configured Public IPs of some https web sites then URL blocking working with IE.
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Aug 3, 2011
I have a request for blocking urls using a class map. I have made this work with HTTP, however it does not work for https. This is a 2851 router with IOS Version 12.4(15)T7. I see i could use the command "match protocol secure-https" however this does not let me specify any specific urls.
Does a new IOS version will support what I'm trying to do? Or if there is another way?
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Nov 18, 2012
I have a closed network that is not connnected to the internet, just other sites that we want to communicate with. We have a cisco router connected to the outside interface on an ASA5505 and a cisco router connected to the inside interface on the same ASA5505. I have an inside interface that connects our management LAN, five separate DMZ interfaces with a separate LAN (VLAN) on each DMZ interface and the outside interface that connects to the other sites. Data is not allowed to mingle between the five DMZ's.
Alll connections to the other separate nodes are handled with the router on the external interface. IPSEC GRE tunnels have been established between all sites and BGP routing has been verified. Pings are good between inside, dmz and external interfaces and between the DMZ's and the other sites, to include hosts on our local networks and hosts at the remote sites. Inter and intra traffic is enabled.
When a remote site attempts an https connection, the initial ACK handshake makes it through the ASA5505, but the return SYN/ACK is being knocked down and I don't understand why (it is not because of ACL's, they are any any at this point).
Why the return SYN/ACK to the remote site isn't getting through the ASA5505 outbound. Will probably have the same issue with FTP, but right now, just trying to solve one problem at a time.
ASA5505 is in routed mode, not looking to NAT since the IP addresses in the DMZ need to be reached by their real IP address.
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Sep 14, 2012
I have an ASA 5505 running 8.4.4.1. I've configured three WAN interfaces and have assigned failover on one of them (we have two ISP's, and a total of 3 static IP's in 3 different subnets). I've noticed that all the traffic is flowing through only one of the three interfaces, but I need to allow incoming https traffic on the second WAN port so I can access our Exchange server (we already use https on the first WAN port to access another server).
[code] WAN1 is the default outgoing route and we've configured several incoming services on it (smtp and https for example) and appears to be working properly as mail is coming and going and users can access the RDS gateway.I need to configure WAN2 to accept https traffic and send it to our Exchange server to enable OWA (webmail) access.I've configured the same Access and NAT rules on all three WAN interfaces for smtp (but I suspect only the first one is currently functioning at this point, I'll test it next chance I get). I thought all I'd have to do is configure an access and NAT entry on WAN2 (same as on WAN1), but direct the traffic to the OWA server instead of the rds gateway server, but it is not working.
In the realtime log I can see that it appears to be receiving the traffic on the WAN2 IP, but seems to be passing this through to the inside via the WAN1 interface.
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Jul 29, 2012
What are the limitations on the max number of concurrent HTTPS connections when using Auth Proxy for HTTPS traffic on a Cisco ASA 5520.
1) What is the max number of concurrent Authentications that the ASA can perform (HTTPS)?
2) Once Authenticated. What is the max number of concurrent HTTPS Authenticated connections to the back end HTTPS server.
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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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Feb 27, 2013
I need to redirect all http and https traffic from one source in a dmz network, to port tcp/8080 on a proxy server on the inside network.
The source device doesn't handle proxying very well, so i've been advised to redirect the tcp/80 and tcp/443 ports to tcp/8080 as it passes through the firewall.
Scenario is thus:
PIX 515E 6.3 (5)
DMZ server: 172.31.255.250 (Real IP), 10.44.181.236 (NAT IP)
Inside Proxy server: 10.44.132.28 (Real IP), 172.31.255.110 (NAT IP)
I've configured a static NAT redirect using the following command: static (inside,dmz) tcp 172.31.255.110 www 10.44.132.28 8080 netmask 255.255.255.255 0 0
When I try to add the next command of: static (inside,dmz) tcp 172.31.255.110 443 10.44.132.28 8080 netmask 255.255.255.255 0 0
I get the following error: ERROR: duplicate of existing static
Is there a work around for this at all or am I stuck with the limitations of the software?
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Jan 14, 2013
I have an ancient Alteon load balancer which only supports HTTP and telnet access. Our management people only allow HTTPS through the management firewall farm, and don't want to change this policy. So I need a low cost HTTPS to HTTP conversion, ideally on Cisco hardware like an ASA5505. It only needs one concurrent user. Is there a way to configure an ASA 5505 to terminate the inbound HTTPS seession and re-originate a HTTP management session to the Alteon? It looks to me as if the Clientless SSL VPN might do the job.Is there a way to do a SSH to telnet conversion on the ASA, or on a router?
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Jan 7, 2011
How to filter URL which includes "https", using the csc ssm module?
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Nov 24, 2011
Configuring an asa 5505 with 8.42 software.I need to access an https server on the inside via the outside interface. have moved the http server enable to port 10443.Tried to make a "network object nat rule"
object network Vejrstation nat (any,outside) static interface service tcp https https object network Vejrstationnat (any,outside) static interface service tcp https https.
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Dec 17, 2012
I have a TAC on this, but thought I would throw it out here too. We recently upgraded a 5520 to 8.4 code so HTTPS traffic can filter through the CSC. Well, it takes several attempts to pull up any https pages. Cisco thought it may be hardware, so I swapped out the CSC, but before I go through the hassle of moving licnese, I brought a second ASA with CSC, which prior to this was their main ASA running 8.2 code and did not have issues, of course HTTPS did not filter through it either. the exact same thing happened on this ASA. So apparently it is not hardware related. One other thing I found, if I bypass https, it still happens, and the only solution is to shut down the CSC module. Now I think it may be the ASA policy that while not the cause, but is being difficult. I found that if you pull SIP inspections out, and reapply them in testing voice issues, you must reboot the ASA for them to work again. I am wondering if this is the case with the HTTPS traffic not releasing from the CSC even with the ACL having it removed. I need to try that next.
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Mar 13, 2011
Is it possible for a Cisco ASA 5580 to create Syslog entries when someone connects via HTTPS or SSH to it. I need to obtain information from Syslog when someone does this.
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Nov 15, 2011
I recently installed an RV042 v1.1 vpn router (older hardware revision but using the latest available firmware 1.3.12.19-tm) and set up VPN access with the QuickVPN client. QuickVPN requires that the HTTPS setting be enabled under the Firewall options, so I did. I then scanned our static IP with grc.com's ShieldsUP! to check for open or non-stealthed ports and discovered that ports 80 and 443 show as wide open, while port 113 is closed but not stealthed. If I disable the HTTPS setting under Firewall, then ports 80 and 443 become stealthed. Is there any way to use QuickVPN and keep these ports stealthed?
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