Cisco Switching/Routing :: 3750 - Transparent Firewall Between VLANs
Jun 19, 2012
I have to put an ACL Firewall in front of a public IP range.There's no routing so I want to do it with a transparent layer 2 Firewall. I found this document which descibes exactly that feature I need: [URL]
It seems to be a feature introduced in IOS 12.3.
My Questions:
1.) is it possible use this transparent firewall feature with the 3750 Switch instead of a "normal" IOS-Based router?
2.) I've seen there is no IOS 12.3 for the 3750 but rather 12.2 (currently installed) or 15.0.1. Is this Feature included in 15.0.1?
If the feature described above is not available, is there any other way to achieve my goal?
View 1 Replies
ADVERTISEMENT
Nov 22, 2011
On a low-end switch like a 2960 the maximum VLANs is 255, as shown in the output of VTP status:
Maximum VLANs supported locally : 255
Number of existing VLANs : 245
When the VTP mode is changed to transparent, VLANs from the extended range can be added without increasing the number of existing VLANs - e.g. if I create VLANs 3000 - 4000 the number of existing VLANs is still listed as 245.
If MST is used to cut down on the number of spanning-tree instances - and assuming propagation of VLAN configuration via VTP is not required - is there any downside to using transparent-mode VTP to increase the number of available VLANs? It does feel like I'm cheating the maximum listed in the datasheet.
View 4 Replies
View Related
Jan 28, 2012
We have a few stacked 3750 switches with vtp transparent configured...some plugged in a fiber from another network into our stacked switches...that network/switch has vtp server configured...once that switch connected to our stack of switches, it turned that stack switch into vtp server...causing the previous vlans configured to erase thus causing management issues with the stacked switches..
View 4 Replies
View Related
Feb 18, 2012
Is is correct that vlan's exceeding 128 runs without spanning-tree.?
View 7 Replies
View Related
Jan 24, 2012
I have a stacked Cisco Catalyst 3750 configuration that currently has one V LAN configured. VLAN 192 - 10.192.0.0/16
The Catalyst has an ip on this range of 10.192.0.1. I would like to configured a few more V LAN's to be able to run some more network ranges through this device. Would it be a case of just adding the V LAN's to the master and then configuring an IP for each V LAN within the inter-v lan routing section? Some V LAN's will require access to each other but not all.
View 8 Replies
View Related
Nov 8, 2011
I'm trying to setup a port on a catalyst 3750 so it will pass traffic for 2 vlans. It connects to a (watchguard) firewall which I've configured with a primary IP (for vlan 27) and a secondary IP (for vlan 29).
However I can't seem to find the correct commands to enter on the cisco switch port (I've tried a variety).
FYI the current configuration is...
interface FastEthernet1/0/38
description ## Connection to WG vlan27 and vlan 29 ##
switchport trunk encapsulation dot1q
[Code].....
View 8 Replies
View Related
Feb 13, 2012
Currently we have an Ava ya IP Office switch running on the same network as our PC clients. I would like to seperate the two network into 2 V LAN's.
We have a mixture of Catalyst 3750 switches and some older 3500 models.Where do I start? Should I leave the PC's and servers on the default V LAN and just move the IP handsets?
View 6 Replies
View Related
Jun 27, 2012
I am looking for a way to create different routing policies for vlans on a 3750 table.
My set up is
Clients----------- 3750 -------------- ASA ---------------Servers
|
|
|
Internet Routers
What i am trying to do is on the 3750 to route private networks to my ASA on different subintefaces and all internet to my internet routers . Each VLAN has a different GW for the internet. On some case i have the ASA as a default gateway. ASA default default route is 3750 where i need the internet traffic to be spllited on the proper Boarder router.
View 1 Replies
View Related
Apr 11, 2012
I would like to configure a 3750 switch port to be able to use two vlans. I know you can do this with a voice and data vlan, but what about two data vlans ? Say I have two devices, one on a 10 subnet and the other on a 172 subnet, but i only have one wall jack for both devices to plug into. So I use a mini switch to connect both devices and connect the switch to the wall jack; and of course this all leads back to one switch port. When I go to enter the switchport access vlan 172 cmd, how would I also make it so the device on the 10 subnet could route out ?
View 9 Replies
View Related
Jun 1, 2012
I am trying to configure router on a stick with 2811 and 3750, but I just cannot get it to work - vlans are not getting propagated from 3750 to 2811: 3750:
Code...
View 1 Replies
View Related
Nov 29, 2011
We currently have a HP blade platform which has two Cisco CBS30X0 switches built into it running Version 12.2(55)SE. These are connected to two Cisco C2960 aggregation switches running Version 12.2(44)SE6. According to this article I need to upgrade these to 12.2(25)FX: url...
1.)This will according to that article only allow me to create edge ports on them, is this a hardware limitation or am I just not finding what firmware I need to upgrade them to, in order to allow the creation of community VLANs? We have these aggregation switches conncted directly to multiple types of firewalls which take care of each of our clients networks including internet access etc. We are wasting many VLANs and IP addresses with our current setup so I am hoping to move over to using private VLANs. The setup of the private VLANs looks simple enough.
2.)When the private VLAN's try to communicate, all info will be sent directly to the layer 3 device I gather, which will not need to know anything about the private VLANs?
View 12 Replies
View Related
Jan 15, 2013
A CISCO 3750-X stack with several VLANs and many ACLs applied to the virtual interfaces. Intervlan routing is on. Connected to this stack are VMware hosts and with about 500 VMs.We started using the ACLs to allow connectivity between VLANs to specific hosts and it has grown to thousands of lines. I personally do not think this is good for the switch and believe the switch was not intended to be used for that security feature.
- Does it make it sense to add an "internal firewall" between the CORE ROUTER AND THE 3750-X SWITCH STACK ?
- Do you recommend any other way?
- Any recommended CISCO resource/white paper to read about best practice
View 4 Replies
View Related
Jan 20, 2013
We have a data center with servers set up for different projects, some servers from partner companies and several small LANs. The traffic between all those needs to be controlled and firewalled. The servers and LANs are divided into different subnets and VLANs. Physically, their traffic is aggregated on a couple of 4506 and then sent to a FreeBSD server, where the logical gateways are set up and traffic is filtered between them.The BSD server is dying and having it there is incorrect in the first place, so we are planning to replace it with two ASA (5520) in failover.The question that arises is how to correctly implement firewalling between VLANs. Originally we thought to set up the firewalls in transparent mode and logically terminate VLANs on a stack of 3750 switches behind them, but would that filter the traffic between the VLANs? Then we thought to perhaps terminate the VLANs on the ASAs, use routing mode, and do filtering there, as well. Or should we implement multiple contexts? We have about 20 VLANs and all of them differ in rules of what should go there. None of this can be concidered an "inside" - trusted - zone, nor "outside". Internet and external links are connected and filtered in a different place.
View 1 Replies
View Related
Feb 4, 2011
I'm setting up a Cisco 3750 layer 3 switch with several vlans. I thought enabling routing would route between the vlans, but no such luck.What I want is to share the internet access of vlan 100 with the other vlans/ip-nets.How can I do that?
View 2 Replies
View Related
Feb 29, 2012
After changing the VTP mode to from client to transparent, I noticed the output of 'show run' now displays the vlans. I don't have any spare 2970s to check this with at the moment. Output of 'show run' looks like this now with vlans info, this was not shown before changing the VTP mode.
vlan 2
name 16.6.16.0/27
!
[Code]......
View 3 Replies
View Related
Mar 25, 2012
My current production network is setup using VTP in Client mode, and I am looking to enable VTP Transparent so I can enable the extended VLANs. My main question would be, would enabling VTP Transparent on my 6509 affect all of the access switches it is connected to? And if so, would changing all of the access switches to VTP Transparent allow them to regain connectivity quickly with little downtime? Or is there another way that I should be handling this situation to enable the extended VLANs?
View 2 Replies
View Related
May 1, 2013
We are moving a small network of 3560 and 3750X switches from VTP Server and Client to VTP Transparent. I noticed the vlan database is stored differently depending on the VTP mode.
Is there any chance of losing vlan database on a given switch when moving from Server or Client to Transparent?
View 11 Replies
View Related
Jun 30, 2012
Do I need the Universal image to perform stftp on a 3750 or 3750-X?
View 8 Replies
View Related
Jun 1, 2012
WE have to deploy ASA5585 in between User vlans & server vlans. we have to find all the ports that needs to be opened on firewall. any tools to do same.
View 2 Replies
View Related
Dec 5, 2012
I have an ASA 5505 and I have the three regular vlans, outside, inside and dmz. The best would be only have outside and inside and skip dmz, but without explenation there is not possible to have more then two clients in whats now dmz because of a mac filter on third party device.
So as security is concerned dmz and inside is equal, one to one and there should be full access between them. I ran the wizard and said that the only way traffic not should be possible to flow is from dmz to outside.
In the NAT rules the onle rule is
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
But traffic from one way or the other dmz to inside, og inside to dmz it says in log
3Dec 06 201215:38:39305006172.17.6.1053portmap translation creation failed for udp src inside:192.168.6.102/49358 dst dmz:172.17.6.10/53 From documentation I have an image with network drawing from documentation. What do I have to do allow traffic btween inside and dmz, both ways.
View 3 Replies
View Related
Apr 26, 2011
I do have the below setup,,
1. I have 6509 switch
2. I have 2 WLC configured in Active/Active mode connected in Trunk mode (L2 Port-Channel) connected with 6509 switch
3. On switch side i have configured the port as Trunk
4. L3 SVI for wireless users are created in 6509 switch (attached the diagram).
I would like to introduce a Cisco ASA 5520 firewall with AIp-SSM module so that all wirelees traffic can be inspected.
The issue is: Without changing any configuration in the network (switch & WLC) is it possible to introduce the firewall?
View 2 Replies
View Related
May 5, 2013
I have an asa 5520. How would I configure my dedicated management interface to be able to route off subnet while the firewall is in transparent mode?
View 1 Replies
View Related
Dec 3, 2012
I would like to configure an ASA5512-X in firewall transparent mode, but I am having trouble getting ASDM to lauch when I do.
I have created a BVI interface with an IP address, and I hve enabled the mangement interface, but ASDM does not lauch when I enter the IP adress of the BVI I created.
Apprently you need to use the bridge-group command to assign an interfce to a bridge group. When I enter this command at the (config-if) prompt for Management 0/0, this command is not recognized.
What are the general steps for configuring the management interface to be able to launch ASDM in transparent mode?
View 1 Replies
View Related
Dec 22, 2011
Trying to set up a asa 5505 in transparent firewall mode. I cannot set the management ip address:
ciscoasa> enable
Password:
ciscoasa# config term
[Code].....
View 7 Replies
View Related
Mar 14, 2011
I am configuring an ASA5540 firewall for a client, only difference to usual being that it is to run in Transparent mode. I have looked through for an EAL4 transparent firewall config guide but found nothing and therefore assumed that the usual one would be used.The clients security bod has now come back and insisted MAC filtering should be used but I can find no reference of this anywhere. Does MAC filtering is required to make a transparent box EAL4 compliant and if so where I can find documentation supporting this?
View 1 Replies
View Related
May 14, 2012
I'm trying to install an ASA 5510 transparent firewall using ASA version 8.4(3)9 but I don't understand how traffic will ever pass through my firewall if both interfaces are on the same sub net(V lan) as the host and it's default gateway? The reason I'm doing this is were installing UAG (or Direct Access) and the UAG appliance need to have public IP's but still be behind a firewall (see attached diagram).
Looking at the documentation (which all seems to be for 5505's running 8.2) it almost seems like i need to have the transparent firewall 'in-line' to the ISP router?, but this router services another IP address range on another v lan for other (routed) firewalls (not shown on diagram) so putting it 'in-line' is not possible. Surely this can't be the case can it? If not how is it supposed to be cabled up and configured so packets go through the firewall?
View 3 Replies
View Related
May 9, 2011
I am familiar with the PIX and ASA's. We have two Cisco 6509's with a FWSM installed in both. Our network is shown in the diagram. We use Blue Coat Packetshapers and Barracuda Proxy appliances. I plan on setting up HSRP on both 6509's for traffic coming from our ISP Cisco 2811's as well as use HSRP for our DMZ and internal network. I would like to setup the firewalls for statefull failover. We will be using PAT for our internal users and one-to-one static NAT for our DMZ.
Is it better to setup the firewall's as transparent or routed?
Since the firewall is built into the switch, how do I insert the Barracuda proxies? I can configure them as transparent or routed proxies.
View 2 Replies
View Related
Apr 27, 2011
I'm integrating a Cisco ASA5505 with a Websense proxy. I have a configuration setup where we have four routers which are used for Internet access. There are two VLAN's - Guest and Private. What I would like to achieve is making the use of available bandwidth by load distribution via GLBP, and filtering users web traffic. Two routers will be used for a GLBP group in one VLAN, and the other two routers will be used for GLBP in another VLAN.The users are connected to a Cisco 2960 switch and are in their respective VLAN's. I'm planning a 802.1q trunk to a Cisco ASA from the 2960 switch, carrying both VLAN's.What I would like to know is if there is a CSC module (or similar) which has Websense installed on it, and if it is possible to setup the ASA5505 in transparent mode to filter the traffic in this way? Hopefully this would allow multiple users to take advantage of the additional bandwidth, and not be restricted by using a traditional proxy setup which where all web traffic would be originating from a single MAC address.
View 1 Replies
View Related
Jul 4, 2012
upgrading our small office network. We currently have about 75 employees with probably 125 devices on the network. I'd like to create about 10 vlans for the different departments and then configure intervlan routing as needed. Currently we have all unmanaged switches and it's just a huge broadcast storm on the network. We are upgrading our Cisco 800 router to an ASA5505 sec. Plus license. I need some recommendations on switches. Of course, this needs to be done as cheap as possible.... Is there a way to use the ASA to configure all the vlans and intervlan routing and access lists and use a cheaper switch to provide the access layer to hosts?
View 4 Replies
View Related
Jan 23, 2013
I have the following config using a Cisco 1921. I am trying to get devices on the the native VLAN to get internet access via the gateway x.x.x.73.Any thing being routed from the other Vlans 15/20/30 can get access, but nothing from an internal IP address. Is there something I am missing.
The Xs replace the same 3 octets for each interface.I am trying to route from VLANs 15/20/30 to see VLAN 5. I have tried a few things, in terms of adding extra ip routes, but can't get anything to work. Each of those Vlans have another router on the other side of them, which I have also tried adding ip routes too, but nothing. One of the routers (Vlan15 is a Draytek 2830). [code]
View 5 Replies
View Related
Mar 27, 2012
I have purchased these two switches from ebay as a test lab, I plan to connect them up via a gigastack modulecable and enable ip routing on the c3550 and vlans to talk to each other.
I'm very much a procurve person and really need to get into the cisco switching.I will want to trunklacp between the switches - whats the process is setting that up on cisco switches?
View 1 Replies
View Related
Feb 19, 2012
I have a 3560E with 2 vlans that I want to route between. one device with 2 vlans and route between.Interfaces are configured as such:
int g0/11
switchport mode access
switchport access vlan 10
int g0/12
switchport mode access
switchport access vlan 11
[code]...
Laptops on each port with 10.10.10.2 and 10.10.11.2 configured on them. I can ping from 10.10.10.2 to 10.10.11.1, but not to 10.10.11.2.What do I have to configure to be able to get the 2 laptops to talk to each other?
View 9 Replies
View Related
Sep 10, 2012
i have a ASA5510 in the office, that already configured 3 context, namely, admin, user, server.in the server context, the last running config was not saved, and there was a power trip last friday night. 1 of the sub interface was affected, and i need to recreate that interface.I am getting the below error, it only allow me to do changes those pre-defined interface.how to I create extra sub interface?
View 3 Replies
View Related
