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IPSec Traffic Through Cisco ASA: Understanding NAT and Inspection Scenarios [inspect UDP 500] ASA tracks ISAKMP negotiation over UDP 500 and automatically permits associated ESP or UDP 4500 traffic Properly allowing IPSec traffic through Cisco ASA depends on whether NAT is applied and whether IPSec inspection is enabled
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
DNS Inspection problem - Cisco Learning Network Hi Team, I have been having problems with DNS inspection and I can't seem to make it work DNS resolutions to public DNS doesnt work Any thoughts? Here is the packet trace: ASA# packet-tracer input INT-WIRELESS-GUEST udp 192 168 254 172 65535 4 2 2 2 53 Phase: 1 Type: FLOW-LOOKUP Subtype: Result: ALLOW Config: Additional Information: Found no matching flow, creating a new flow Phase: 2 Type
IP Inspects -- Why do we need them? - Cisco Learning Network ip inspect name FWOUT udp ip inspect name FWOUT icmp ip inspect name FWOUT ftp This will tell our IOS firewall to properly inspect and handle ftp traffic In other words, this adds the some specific protocol intelligence that is required to handle ftp What about other protocols, like SMTP? Shouldn’t that work since there are no secondary
Zone Based Firewall Part 1 - Cisco Learning Network Zone-Based Policy Firewall (ZBPF) (Zone Based Firewall) is the successor of Cisco IOS Legacy Firewall called (CBAC) Context-Based Access Control Concept of ZBPF is zone, which groups different interfaces sharing the same security attributes or the same level of trust Permissions for traffic forwarding is made between the zones or within a zone, not between physical interfaces
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
Cisco ACI Local SPAN (Access), Nexus 9000 Ethanalyzer SPAN-to-CPU It can inspect packets that are either sent to the switch’s supervisor or generated by the supervisor itself SPAN-to-CPU allows traffic from a specified interface on the Nexus switch to be redirected to its CPU interface
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
decrement-ttl - Cisco Learning Network inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect netbios inspect rsh inspect rtsp inspect skinny inspect esmtp inspect sqlnet inspect sunrpc inspect tftp inspect sip inspect xdmcp inspect icmp class class-default set connection decrement-ttl Show of global_policy Rack1ASA1# sh service-policy Global policy