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Zone-Based Policy Firewalls 5 step process - Cisco Learning Network My example PMAP action will be to inspect the class map Here you can also define the policy action to pass or drop traffic Step 5 you will create a service policy by naming it and identifying the flow in which traffic is going and identifying the zone membership (zone-membership) and use the names of the zones we created
Zone Based Firewall Part 1 - Cisco Learning Network Inspect Allows for stateful inspection of traffic flowing from source to destination zone, and automatically permits returning traffic flows even for complex protocols, such as H 323
IPSec Traffic Through Cisco ASA: Understanding NAT and Inspection Scenarios Conditions: ASA is doing NAT ASA is configured with inspect ipsec-pass-thru Required Configuration: Enable IPSec inspection on ASA Allow UDP 500 on outside interface (if R7 is initiator) What Happens: ASA inspects ISAKMP (UDP 500) negotiations ASA dynamically opens holes for ESP and or UDP 4500 based on negotiation Benefit:
IP Inspects -- Why do we need them? - Cisco Learning Network CBAC Definition ip inspect name FWOUT tcp ip inspect name FWOUT udp ip inspect name FWOUT icmp Seems pretty complete doesn’t it? With this simple configuration, most things will work Earlier, I said that all TCP services would work That is mostly true, but we’ll soon see an exception to this If we look at the context sensitive help for ip inspect name FWOUT, we see several other
Question about ZPF with the TFTP protocol - Cisco Learning Network I tried a class-map: class-map type inspect match-any USERS_ACCESS match protocol icmp match protocol tcp match protocol udp match protocol tftp Does the order matter? And should I use: class-map type inspect match-any USERS_ACCESS match protocol tftp match protocol icmp match protocol tcp match protocol udp I'm not at the lab right now so I can't try it Maybe tomorrow morning
ASA Default Inspection - Cisco Learning Network Hi Atul, Inspection refers to the ASA's ability to look inside the configured protocols and perform certain actions based on the 'controlplane' traffic found in the traffic flow The ASA has an understanding of the protocols it can inspect Some protocols, such as FTP, can dynamically open additional ports for data transfer The inspection is not required as such, but some protocols won't work
Class Map [match default-inspection-traffic] Hi Atul, Sure you can do that By default, class-map inspection_default is assigned to global_policy policy-map and to view the protocols inspected by default on ASA use following command ASA1# sh run policy-map global_policy ! policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect esmtp
Question Detail - Cisco Learning Network Hi Loc, Take a look at this example It shows how stateful inspection is configured in IOS XE devices Security Configuration Guide: Zone-Based Policy Firewall, Cisco IOS XE Release 3S - Firewall Stateful Inspection of ICM… Example: Configuring Firewall Stateful Inspection of ICMP Device# configure terminal Device (config)# access-list 102 permit icmp 192 168 0 1 255 255 255 0 192 168 2 22
unable to ping outside interface of ASA - Cisco Learning Network The ASA needs to inspect ICMP for the return traffic to work (the quick way to do this is "fixup protocol icmp") And also be aware that the R1 would not be able to reach the IP address on the ASA's outside interface This is a caveat of the ASA However, R1 should be able to reach R5 if everything is correctly configured Expand Post Like
Intelligent Proxy in Cisco Umbrella how it works The solution is the "Intelligent Proxy" with "SSL Decryption" features The intelligent proxy is the ability for Cisco Umbrella to intercept and proxy web requests to inspect the content of the web traffic We can classify by categories which type of web traffic we want to proxy and apply SSL decryption