Cisco :: ASA Inter-context Traffic?
Jan 25, 2012
I don't have an ASA to lab this up on, and having read through the literature I have available to me I'm not sure how this would work but here's where I am at the moment. Situation: One ASA, two contexts, no shared interfaces, no 'hairpinning' to another common device like a router or layer 3 switch.Requirement: The ASA will separate two security zones. Each zone must be independent of the other (no shared interfaces).Expectation: Traffic to be enter the sole interface in context A, then be internally directed to context B before being dispatched out.
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Jan 11, 2013
I have a customer, who has the SVI's configured on the Core (4500x) and this is connected to a ASA 5525x, there is a requirement of restricting traffic between different vlans. How can i use the ASA to accomplish this task. ACLs on the Switch are not stateful and hence not considering this option, Also we are not planning to configure the GW's on the ASA since there is lot of traffic between the vlan's and this will become a bottleneck
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May 9, 2011
I just received my rv220w and perhaps I haven't got enough experience with cisco routers. How can I restrict traffic between different VLANs?
For example: Hosts in one VLAN shall only be allowed to access a web server in another VLAN. All other traffic should be blocked. I've created two VLAN with Inter VLAN Routing enabled. But it seems there's no way to install a firewall rule between VLANs.
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May 7, 2013
Is it possible to use 1 or 2 of the 4 gigabit ethernet ports from one ACE straight into the other ACE for redundancy? So ACE_01 gig0/4 to ACE_02 gig0/4.If so, is it a case of just having the layer 3 config instead of trunking etc..Also - is it possible to create a context within the same vlan as the Admin context?
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Jul 1, 2012
On my production environment I have a firewall with already two contexts defined (15% of CPU used) and I want to add a new one.
This context is going to use the same interfaces as the others contexts. When I will enable the context, can I have some sort of repercussion on these two context ?
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Jan 13, 2013
I have two ASA 5510 in an Active/Active failover configuration; On the first ASA I have a license for five security contexts, on the second one I have the default two. On the pair I configured seven security contexts and everything works as expected; so far so good. Let's suppose now that the first ASA (the one with the license for 5 contexts) goes up in smoke; all the contexts migrate to the surviving firewall and life is still good. But what happens if, for some reason, I need to reboot the second ASA before the first one is repaired? My guess is that it will come up with just its own license for two contexts and that I will not be able to operate all my virtual firewalls.
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Dec 15, 2011
I face an issue while creating source nat on cisco ACE. There is already a default source nat ip for the context. I created a new one for smtp traffic alone. Iam facing issues in prefixing the newly created nat-pool rule(nat-pool 100) above the default one (nat-pool 2257) on the external gateway interface as its not placing that on top ,due to which only the default snat ip is getting shown on all servers.
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Mar 10, 2011
I need to create a IPSec Site-Site VPN in the Single mode firewall. Is it possible to create the tunnel. I have ASA 5510 Security Plus with Ver 8.3
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Oct 25, 2011
What are the new features added or going to be available on the 8.5 release on the ASA. Would this release "finally" support VPN on multi security context mode.
By the sounds of things looks like every other major vendor supports this feature except Cisco.
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Jan 3, 2013
I have a customer who has vlan's and SVIs residing on a core 6509. the 6509 is connected to an ASA 5515 then out to the internet/sp edge deviceIP routing is not turned on. there is a static route on the 6509 that routes all ip's to the inside interface of the asa 5515 that the 6509 core is connected to.there is a set of vlans that are apart of a 192.168.128.0/19 subnet and all those vlans can "speak" to each other.
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Apr 12, 2012
Just messing around with packet tracer for a little practice. I tried to setup a router on a stick config with 3 switches trunked and PCs on different vlans. Anybody know of any issues that may arise with STP and inter-vlan routing? I set everything up correctly with trunking, addressing, encapsulations, vlans, but did not touch STP. Unable to ping from any PC to any where.
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Jan 4, 2012
I know most QoS capabilities aren't available in multiple context mode, but I need to do some really simple policing on one of my contexts. I just want to apply a hard 20Mbps cap on an interface. I've seen a few places that suggest that basic policing is possible in multiple context mode, but apparently not by the normal commands.
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Mar 28, 2012
I Just deployed some of these new modules and running A4.x code. How to configure an ACE with the maximum context?
We run in tranparrent mode with 110 Contexts, we found that with a base config for each context(80 lines of code) this would only leave us with 7% of available RAM. The Device begins to shut down services @ 5%. like SSH and others.
So, Is this even possible to configure 250 contexts and still manage the device.
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Sep 16, 2012
I need to upgrade 2 active-standby cisco ACE4710, the issue is I cannot access FTP/TFTP/SFTP server via Admin context but can be accessible via other contexts.
Can I copy the ACE system software file from FTP/SFTP/TFTP server to image: directory durectly or need some other way around ? I could see the option is available to copy ftp: to image: via other context.
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Jul 3, 2012
I am currently working with ASA 5585 with several contexts. What is the percentage of the CPU used per context. I already have the opportunity to do it for the whole ASA (context admin) using the SNMP mib CISCO-PROCES but, unfortunalty, this mib doesn't allow us to know the percentage of used CPU per context.
I was able to know the number of core used per context but not the percentage of the CPU used.
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Jan 14, 2013
We have a pair of cisco Asa 5520 currently running multiple context mode. We wish to change to single context mode for following reasonWe will migrate infrastructure to hosted vendor . I was thinking of configuring site to site . Current Asa we pal to kee since wireless sits in our DMz and we have net screen that hosts tunnel for erp1. Is context change required for running site to site2. Is it a good idea for creating site to site on to make sure wireless network and oracle traffic goes through managed firewall ?
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Feb 25, 2013
Say I have a managed switch that supports VLANs. I have two computers and one server connected to the switch (I'll call them PC-1, PC-2, and SRV-1).Without routing, I want both PC-1 and PC-2 to talk to SRV-1 and vice versa, however I don't want PC-1 or PC-2 to talk to each other.I achieve this by making each port a trunk port. I make PC-1 a member of VLAN 2, PC-2 a member of VLAN 3, and SRV-1 a member of VLAN 4. The port that SRV-1 is on I make a tagged member of PC-1 and PC-2 (VLAN 2 and 3 respectively) and make the ports the PCs are on a member of the SRV-1 VLAN (VLAN 4).Everything tests OK (that is, the clients can't talk to each other, however the clients can individually talk to the server)
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Feb 26, 2013
When you configure an ABR to inject a summary route into an area, what are the circumstances under which the ABR will inject the summary? I.e., since it's not a set of specific subnets learned directly from other OSPF routers, does the summary get injected regardless of what's in the routing table of the ABR?
I would imagine this could cause problems in a situation where there is an ABR injecting a large summary into an NSSA that also has a backup path over the Internet (IPsec tunnel or something). For example, if the area 0 routers from which the ABR receives routes went down, the ABR would continue to inject the summary route into the NSSA thus tricking those routers into sending traffic to the ABR rather than over the backup link.
I can't imagine any other way an ABR would decide when it's suitable to inject the summary though.
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Jan 31, 2013
What is inter vlan routing protocol? What are its three modes?
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Oct 21, 2011
i am doing a set-up having the ASA as my Layer 3 device providing inter-vlan communication. ASA with 8.3 firmware. how i can achieve this goal. i am trying to follow some answered topic related to this but its pre 8.3. VLANs created on the same physical have same security level.
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Sep 12, 2011
[code] I would like to config two IP ranges, one for staff, one for guest wireless access. The dlink wap supports multi vlan SSIDs.Reason I'm doing this is to prevent access on the guest wireless to access the win 2003 server.Will the switch inter vlan route the 192.168.2.1 to 192.168.1.1? How will vlan 2 get DHCP, will dhcp relay need to be set on vlan 2 to 192.168.1.20 ? [code]
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May 17, 2011
Can inter VLAN routing be done on SRW (Cisco 300 series) switches ?
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Mar 18, 2011
I've got an ASA which has a number of contexts. They all share the same external interface, and in the interest of saving addresses I'm wondering if the standby address for each context is really necessary. I know that in active/passive the standby address is what allows the two to communicate and monitor that particular interface, however, in active/active I don't see the point as the context is either going to be on one or the other.
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Jan 12, 2012
We have ASA configured in multi context mode, with software 8.4(2) configured for AAA Configuration is admin context as follows:
aaa-server TAC protocol tacacs+
aaa-server TAC (management) host 10.162.2.201
key *****
aaa authentication enable console TAC LOCAL
aaa authentication http console TAC LOCAL
aaa authentication serial console TAC LOCAL
aaa authentication ssh console TAC LOCAL
Because of multiple context, after logging in we enter System context. Console port authentication is working fine except access to privileged mode while connecting over console port. After issuing "enable" command ASA accepts only configured enable secret in system context and changes user ID to enable_15, so we are unable to do user-level command authorization and accounting.It seems that ASA in system context is not aware of any AAA configuration, and there isn't any command to configure AAA in system context.Is there any way to configure enable authentication over AAA in system context?
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Apr 27, 2011
I am looking to deploy a cloud/borderless network solution and cannot get my head around how the licenses (AnyConnect Mobile and essentials) will be applied in a multiple context deployment. Any correct documentation.
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Oct 23, 2012
Firstly is this the right forum to post threads about FWSM's. We have 2 FWSM's in two seperate 6500 switches. There are a number of contexts on each FWSM.I want to fail a context from one FWSM over to the other 6500 and FWSM. Can you tell me how I can do that? Do I need to do it in the admin context and do I need to do it on the admin context of each 6500?
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Oct 29, 2012
I have a ASA 5510 and planning to implement multiple context in a 2 tier security level and vrf-lite. meaning I have 2xASA facing the internet and below that a 2x3560 switch for our extranet and below that is another 2xASA for intranet. See diagram below. In this kind of network I want to know how it would impact the total throughput and resources of the ASA using multiple context?
INTERNET
| |
| |
2811A 2811B
| |
| | (OUTSIDE)
ASA_A-------ASA_B
| | (INSIDE)
| |
3560A---------3560B
| |
| | (INSIDE)
ASA_C--------ASA_D
| |
| | (OUTSIDE)
3560C----------3560B
| |
INTERNAL NETWORK
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Dec 3, 2012
I have just joined a networks team and will be working on two fwsm versions 4.0(8) in two 6500 routers. Now the fwsms seem to be virtualised with multiple contexts. The server team want a new context setup for a group of servers behind a vlan. [code]
This context just seems to have two Vlans and a BVI interface. What is the function of this context and why we have 2 admin contexts?
Also another important question is on which 6500 do I create the new context? Is the admin context active on one 6500 just like other contexts and will sync across or do I have to create the new context on both 6500s.
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Dec 9, 2012
I need your support for upgrading the Security context license on 5550, at present we have 5 Security context license installed in ASA but we want it to increased till 10 conctexts. I want to understand if we need to get addtional 5 Security context license or 10.
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Nov 6, 2011
I'm having a problem with a context, I have two CISCO ASA 5550 (failover) and also we have the CISCO CSM to monitoring it, but since some weeks is showing a memory usage of 100% but then it drops until reach zero and then again the graphic goes up. This is the second time that the graphic shows this
I also check this on the CLI and i'ts fine because is showing the real percent, so my question here is why is showing this kind of behavior, I mean it was working fine before.
In the other hand I checked the secondary device and this is showing a 99% of used memory, but as the other one this graphic doesn't drop
I also checked via CLI and it says that it had the 99% memory used , Is there a way that i can put more memory on the context or what do you suggest that I can check on my firewalls.
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Jan 29, 2012
I am trying to configure multi context on the 5520 ASA , how can i configure 1 outside and 1 inside for the 2 context or how to configure both outside from the same subnet and insides also from the same subnet , i did the below configuration but didn't work . [code]
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Jun 6, 2012
I have a active-active setup with 2 cisco asa 5585x running 8.4 - the boxes ahve each 2 sec context's build-in - which gives 4 sec context in the cluster. I have 2 x 5 extra licenses (2 x ASA5500-SC-5) which I haven't applied yet - will this give me a total of 10 or 14 security contextes? I am a bit in doubt because if I only get 10 sec contextes in this cluster then could I instead get a single 10 security context license (1 x ASA5500-SC-10) and add this - hereby I would get 12 then.
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Mar 11, 2013
We already know that ASA 9.0 supports site-to-site VPN in multiple context mode. But remote access VPN isn't supported. Obviously, SSL-VPN is a very important feature for most multi-tenant deployment scenarios where each context acts as a border firewall towards the Internet for each tenant. The alternative to terminate all tenant remote-access VPNs in one context means that each tenant would have to be routable from the ASA, which of course isn't a reasonable requirement in most cases.
So, what I'd like to do is to deploy an ASA cluster, and provide remote access VPNs for each tenant, where the connectivity for each remote access group can be addressed with whatever IP address space, and that goes into it's own VRF in the back-end.
As far as I can tell, this isn't doable with the ASA, since multiple context mode prohibits the use of remote access VPN, and I can't think of any other work-around than either having individual firewalls running in single context mode for each tenant, or demand that all tenants are interoperable routing-wise and configure a separate ip address pool in a single context mode for each tenant.
Essentially, there's no good way to implement this with multiple virtual firewalls, using cisco firewalls?
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