- BGP communities are optional transitive attributes
- They are used mainly to associate an administrative tag to a BGP route
- In spite of the communities being transitive, Cisco IOS routers do not pass them across the BGP sessions by default. The feature needs to be activated using the command “neighbor send-community”
- To display the community in the structured notation, you need to enter the global configuration command “ip bgp-community new-format”
- In order to set a community value, use the route-map command “ set community etc” or to add the community value on the existing community values use “set community additive ”
- The routes with communities assigned to them can be matched using “community-list” and which can then be referenced in a route-map later. There are two types of community lists : standard and extended. For eg.
- ip community-list 1 permit 101:1 101:2
- ip community list 1 deny no-export Std community list
- NO-ADVERTISE community attribute: The well-known NO_ADVERTISE BGP community signals BGP router not to advertise the particular prefix to any BGP peer.
- NO_EXPORT community attribute: The well-known NO_EXPORT community instructs the BGP router to advertise the prefix only across iBGP peering links. It ensures that the prefix is not advertised anywhere outside its AS
Be it a Network Operations Manager, Security Architect or a Security Auditor, the people up the hierarchy always harangue the Security Engineers to compile the list of firewall objects or rules or policies or the traffic statistics and so on.. This can turn out to be quite hectic especially if there are no built in features to systematically provide the output in a "layman-readable" format. Come, Checkpoint's "Object Explorer..." which not only provides the output in the "layman-readable" format, but also provides in-built filtering mechanisms, thereby ensuring that the Security Engineer doesn't have to rely on Google for building his scarce Microsoft Excel data filtering skills. The following screenshots will show how easy it is, with Checkpoint R80.10 to generate the firewall configuration inventory. On the SmartConsole Unified Portal, navigate to Menu >> Open Object Explorer... Select the Categories you wish to see in your output: Click o...
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