Cisco Firewall :: How To Block URLs In ASA 5510
Oct 9, 2011
I have 1 firewall module of ASA 5510. I am trying to block some URL's in it via ASDM but not working.
So far tried by following standard cisco doc which shows hwo to enable URL blocking via ASDM n via regex. Not working in my case.
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Jan 31, 2011
i have cisco asa 5510 as firewall, i was trying to block some site using the link provided below
[URL]
and its working fine, but the problem i am having, when i go to download attachment from hotmail its not downloading, from gmail and other mails its
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Oct 20, 2012
i use ASA 5510 and i want to block some urls :
-192.168.2.70 to 79 allow every thing
-192.168.2.80 to 89 : block facebook , myspace, twiter,
-192.168.2.90 to 99 : block facebook , myspace, twiter, youtube , dailymotion
-192.168.2.100 to 199 deny everting
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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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Jul 12, 2012
I have cisco ASA5510 firewall using in my network but unable to bolck Url's unwanted. can i block the [URL] on the asa by using regular exp.
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Dec 27, 2011
How to block the unwanted urls or sites in firewall?
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Dec 2, 2012
how to allow few url and block other in cisco asa 5510
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Apr 12, 2011
ASA 5510, version 8.4.1 with ASDM 6.4.1
How can I prevent the user to share files with p2 programs (torrent, eMule, etc) and to chat via Instant Messaging, Facebook, Twitter, etc. ? I find a lot of suggestion, but allways related to 8.3 or older
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Oct 3, 2012
block skype 5.1 in my network. This version of skype doesn't need Administrator rights to be installed. In my network there are 2 ways to Internet, one filtered by a PIX 525 ver 6.3(3) and the other by a ASA 5510 ver 8.3(2). No IPS system present on my network.
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Nov 23, 2012
i want to Block torrents service in my Firewall , and give access to one of my pc , is it possible to do in the IOS 8.2
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Feb 25, 2013
Now, i want to block some websites in cisco asa 5510 and in want to block key word like "sex", "game",..how can i config it?
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Jan 4, 2012
I have a ASA 5510 device. I have been asked to block Ip range for India from accessing set of servers. Total Subnets: 34,675,968.I really don't want to create a two mile long access list with all these subnets.
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Apr 16, 2013
I have cisco ASA 5510 with basic configuration (default policies). The problem is that windows XP users are unable to send emails form MS outlook and unable to log on to Hotmail , Gmail or any mailing site. While windows 7 and 8 users are not facing any problem.
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Mar 5, 2012
how to go about setting up the ASA to block any SMTP traffic outbound except for our Exchange Server. This is in relationship to a SpamBot issue that blacklisted us. I have an ASA 5510 running version 6.2(5) / 8.2(2) with three ports. DMZ, Inside and the Outside interface. Up till today, I only needed to block outside traffic to our internal network which I used the ASDM to configure a rule on the outside interface for an incoming rule. I am assuming I need to create an outgoing rule on the outside interface; however, just to make sure I understand the terminology/traffic flow, I created the rule with my computer as the source (192.168.0.131) with ALL destination and the service as HTTP. My logic, which seems to fail here, is that any traffic from my computer going outbound would be blocked; however I am still able to browse... That said, if I were to change the source as the Exchange server and the Service Type to SMTP, it would not actually block traffic and therefore not solve our problem. I even gone as far as permitting traffic from my computer, expanding the hit counter and I see no hits. So I am no doubt doing this wrong. What I do know, is when I first created the rule, a second rule was automatically created (Implicit rule) that deny all sources and blocked all HTTP traffic until I changed it to Permit?
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Jul 25, 2012
I have created Different extended access-list which allow/block some specific services like IP,TCP,UDP ,ICMP etc for certain source and destination . But now I have to allow/Block all/any type of services to a certain host from a extended access-list . How can I do it ?
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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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Mar 17, 2011
I purchased a SA520W for my company, and i have some probles for configuring firewall. I want to deny access to facebook, youtube and twitter but not for 4 hosts which needs this websites for work. I tried to configure content filtering > blocking URLs but with this solution, I deny acces for all users, So, I tried to make IP v4 rules :
The 4 hosts who may access to these websites are 192.168.50.124 to 127
Example :
FROM Zone : LAN
TO : WAN
Service : Any
Action: block always
Source hosts : 192.168.50.32 to 192.168.50.123
destination hosts : 66.220.158.11 (one of the facebook's ip)
but it does not work. So, I am looking for an other solution, or maybe my rule is not correctly configured ?
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Apr 22, 2013
where is the best place to block unwanted traffic? By that I mean, should I block it at the router, firewall, IPS? As an example, I'm dealing with DNS flood attacks - probably DDoS and reflection. I have a pair of Cisco 2821 routers with two different ISPs doing BGP. Behind that I have an ASA 5510 with IPS module. Behind that I have 2 public DNS servers. Over the last few days I've seen an increase in bogus DNS queries - high volume, distributed. My question is where is the best place to put the ACL to block them? I've been putting them on the ASA, but when the attack is running, it jacks the CPU to 60%. If I don't put the ACL, the IPS seems to pick them up after a while and the CPU is almost as high as with the ACL. I haven't tried to put the ACL on the routers.
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Jan 6, 2011
I have a Cisco ASA 5510 with a 5 block of IP addresses assigned from our ISP. I am having issues with connectivity and routing traffic from the outside interface to the outside interface. I have my outside interface set up with IP address of 24.182.x.146, it allows internet access and also hosts a web server. Any time I have a client using this device for internet access, I am unable to have traffic accepted for my web server. I.E 100.100.x.52 is using this device, it browses to https://24.182.x.146 and it gets an unable to connect. I am able to connect to the web server from any other ISP/Device. [code]
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Nov 29, 2012
I've configured an ASA 5510 FW with asa901-k8 ios. on it's "inside" port there is 10.90.0.0 network. there is another network (10.190.0.0) in my system that can be reached via another router which has 10.90.0.253 ip address. when a client in the 10.90 network wants to reach the 10.190 network the fw redirects the request to the router (10.90.0.253) because the fw is my gateway. there is no problem so far... but... while i can ping and traceroute a 10.190... user from 10.90... network, i can't use any non-icmp appliactions. for example i can't use rdp programs, http web interfaces of some devices on remote network (10.190.0.0). what can cause that? is there any rule in asa that blocks these protocols?
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Jun 5, 2012
some recommendations for product selection and overall infrastructure setup for our datacenter: We have an old, legacy setup, and are looking to replace equipment, improve performance, enhance security, and implement hardware redundancy (if cost effective).
1) We now have (2) IP blocks from our provider, and need to support both (because we have mailers on older IPs with a good reputation rating).
2) We have (2) aged Sonicwalls, one for each IP block, each connects to multiple internal subnets (some internal subnets need connectivity to eachother, some don't).
3) We have (mostly) public facing web servers (Linux/Apache), as well as database servers (with no external access).
Questions-
1) Should we implement a Cisco ASA 5520 w/ or w/o SSM modules for the new IP block (for webservers)?
1a) Should we implement a Cisco ASA 5510 or 5505 for the existing IP block (for mailers)?
1b) Or, can we have multiple public IP blocks connected to a single ASA 5520 (or 2 ASA's w/ failover)?
2) Can we connect both firewalls (5520 and 5510/5505) to a single Catalyst 3550 (or similar) using VLANs, and have 6 - 10 VLANs for webserver subnets, with ACLs controlling which subnets/servers can connect to eachother?
2a) Should we implement a second Catalyst 3550 (or similar) for redundancy (webservers have multiple network cards).
3) From our provider, we only have (1) dmark which both IP blocks connect through. Currently we have a switch connected to the dmark in order to 'splice' the connection, and have both existing firewalls connected. Is there a better approach to this?
4) We would like to implement SSL-VPN, and possibly site to site IPSec VPN, but only if there will not be significant performance degredation.
5) Other thoughts/recommendations for new features, enhanced security, or redundancy?
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Feb 27, 2013
I configured a Cisco 861 router to allow only youtube.com and block all other URLs. I used the below configuration but is not working. Actually everything is blocked even the access to the router. Is there any other way to acheive this requirement?
class-map match-any YOUTUBE
match protocol http host *youtube.com*
class-map match-all YOUTUBE-ONLY
[Code].....
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Jun 12, 2011
I have a performance issue with ACE 20, urls is very slow sometimes, and not from all computers, some computers are facing this problem not all of them,
[code]....
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Oct 11, 2011
I would like to know how can I block a ip address from the CLI at the Cisco PIX Firewall Version 6.3(4)
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May 23, 2012
How many urls can you block with this router also is it good for games and watching videos or is it just a slow business router for business stuff ?
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Jun 22, 2008
I have a ASA 5520 upon which I need to build a WebVPN for the company urls - webmail, intranet portals etc. There will be 2 groups -
a. Confidential Access - For senior management.
b. Public Access - For employee access.
RSA Token & LDAP auth would be used for access to the WebVPN. However, I am unclear on certain aspect.How do I isolate the 2 groups? I mean only Senior management should be able to view & access the first set of links while employees see and access the other set of links only.Both the groups will be available to all users loggin on to the WebVPN. Since the authentication mechanism - LDAP - is the same, anyone would be able to access the groups and in turn, urls.
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Jun 28, 2011
how can i store urls used by the client side in the server using java
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Jan 1, 2012
I'm a big fan of Cisco products and recently have purchased an E4200. I always connect my iPod classic to the router and listen to the music on my ps3 and laptop. The only problem is that I can't make any playlists since the media server creates a different link to a song, every time I reconnect my iPod. It'd be great if you allow the server to create links like below. I'm sure all the users will e much happier with it! [URL] like this.
Something tells me I'll never see the day that I can activate this feature on my E4200. Anyways, I leave it to your engineers make it happen...
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Sep 2, 2009
I am encountering very odd browsing errors when using this router. URLS are being redirected to the wrong IP addresses.
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Feb 27, 2012
I really need to know a way to block teamviewer through asa. Knowing that teamviewer uses https port.
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Dec 18, 2011
What does a firewall block at the transport layer?
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Oct 29, 2012
how can we block videos only in Facebook using firewall
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May 20, 2013
I am using ASA5505 and I would like to block certain websites such as facebook.com on some users only
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