trying to set up security context for one of our remote clients. they have an ASA 5540 and want to use it for seperating their own & their subsidaries traffic flow. Would each of these contexts have their own seperate interface details? Will the main context ( system context, as i know) be the one with main config?Can the system context have main configs or does the configs have to be on the other contexts.
If the main context is to have the internet link connected, and the other contexts were to use this link , will the other contexts need seperate public ip's on their own interface for internet to work or will they be using main context.
Thanks.Something which is confusing me. I plan to put in 4 contexts ( excluding admin). Is admin context required to be configured with ip address and things & whether i can rename it to be used a different context?
Second, this firewall is planned to get connected with a upstream router(most probably with a layer2 device in between). Now this router interface will have vlans ( 4 vlans) on it to cater to all 4 contexts. Is this correct and does this mean the outside interface is generally shared?
If not, please suggest a way out to understand the interfacing of upstream router & physical firewall.
Thanks in advance.
PS: different query related to context was cleared by another gentleman in different post, but out of nowhere i got this nagging doubt.h
Most of what i have commented below has been answered but thought it will be help to give you quick Architectural overview of the context on ASA.
System Context ============== Unlike other contexts, the system execution space does not have any Layer 2 or Layer 3 interfaces or any network settings. Rather, it is mainly used to define the attributes of other security context attributes. Here are the three important attributes configured for each context in the system execution space:
1, Location of context's startup configuration. The configuration of each context is also known as a configlet. 2, Interface allocation. 3, Additionally, many optional features, such as interface and boot parameters, can be configured within the system execution space.
Admin Context ============== Also the admin context provides connectivity to network resources, as mentioned earlier. The IP addresses on the allocated interfaces can be used for remote management purposes, such as SSH or Telnet. The security appliance also uses the IP addresses to retrieve configurations for other contexts if they are located on a network share. A system administrator with access to the admin context can switch into the other contexts to manage them.
The security appliance uses the admin context to send the syslog messages that relate to the system.
The admin context configuration is similar to a customer context. Aside from its relationship to the system execution space, it can be used as a regular context. However, using it as a regular context is not recommended, because of its significance.
As mentioned above you can change the name of admin context BUT Changing the name of the admin context from admin is not recommended.
Pakcet Forwarding between Context ====================================
In multiple mode, the two contexts communicate with each other as if two standalone appliances were communicating with one another. The security contexts can talk to each other in two ways:
Without a shared interface With a shared interface Depending on what mode you use, the packet flow is different
DocumentationCode download linksGoalRequirementLimitationsSupported ISR
and UCS-E ModelSupported ISRG2 and UCS-E Blades:Supported ISR4K and
UCS-E Blades:Step by Step ConfigurationConfigure one of the connectivity
options to access the Cisco IMC from the n...
Firepower Threat Defense (NGFWv) on UCS E-series - Transparent Mode in
HA DocumentationCode download linksGoalRequirementLimitationsSupported
ISR and UCS-E ModelSupported ISRG2 and UCS-E Blades:Supported ISR4K and
UCS-E Blades:Step by Step ConfigurationCo...
Question I am currently unable to specify "crypto keyring" command when
configuring VPN connection on my cisco 2901 router. The following
licenses have been activated on my router :