I have Zone Based Firewall running on a 2821 router and would like to configure Url Filtering with Websence . IOS running on that device is
c2800nm-adverterprisek9-mz.150-1.M7.bin . Once you have ZBF config you cant configure url-filtering using classic way ( ip inspect ) and this has to be done using class , policy maps .
For this to to happen it is required to have match protocol http command under the class map , it wont work using the match access-group command . Following is what I configured
ip access-list extended NAT
permit ip 172.20.0.0 0.0.255.255 any
class-map type inspect match-all Inside_to_Restrict
match access-group name NAT
match protocol http
Once I put match protocol http command browsing becomes dead slow , also without using match protocol command I cant continue to configure Url Filtering . Is this a problem related to IOS where match protocol command isnt working fine . I have checked CPU utlization of Router and it was roughly near 7 percent .
I could see debug messages on which means URL filtering was working but from user end it HTTP was almost dead and website was not opening up .
After doing a lot of troubleshooting I found out that it was a problem related to match protocol http command , when ever I put this command under the class-map HTTP sessions become dead slow . We had communication with someone working with web sense devices and got to know that one more customer had to scrap ZBF for web sense to work .
I cannot apply classic url filtering ( web sense ) which requires ip inspect as router's interfaces are already configured for Zones .
We have the same problem: for some websites HTTP response is very slow when using ZBF and Websense urlfilter (6-7 minutes for JPG of ~38Kbytes). If we remove the urlfilter config then the same website loads correctly at good speed.
When using the ip inspect firewall config and urlfilter we had the same problem until we added
access-list 1 permit any
ip inspect name test http java-list 1
With that piece of config on ip inspect the inspect http and URL filter works just fine but there does not seem to be an equivalent for ZBF.
Did you find a solution to use ZBF and not have that issue without rolling back to the IP inspect config ?
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...