WLC 2106 CPU ACL Preventing Client from Getting DHCP traffic

Hi,
Here is my portion of ACL List applied on the Controller CPU.
- permit 192.168.1.0/24 0.0.0.0 UDP DHCPServer DHCPCLient Any Outbound
- Permit 0.0.0.0 192.168.1.0/24 UDP
DHCPClient DHCPServer Any Inbound
The DHCP server is connected to a Cisco Switch on different VLAN.
When I enable the CPU ACL. The client couldn't get any IP address.
But when I disable the CPU ACL. the clients have no problem getting the IP Address.
what could be wrong here?many thanks

If your DHCP server is on a different subnet than your clients, then you'll have to set up a helper address so that clients can cross L3 to reach the DHCP server.
Apply the following command to the router interface facing the client:
ip helper-address

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Hi, how are you?. Sorry by my questions and thanks for the patience.
I have a doubt. CPU ACL affects only the traffic of the management interface?.
For example:
Controller WLC 5508 version 7.0.98.0
Interface management IP address 186.108.26.2/24
Interface XX IP address 190.139.109.101
I have configured the following ACL and applied to CPU ACL:
(Cisco Controller) >
(Cisco Controller) >
(Cisco Controller) >
(Cisco Controller) >
(Cisco Controller) >show acl cpu
CPU Acl Name................................ ACL
Wireless Traffic............................ Enabled
Wired Traffic............................... Enabled
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ACL Counter Status               Enabled
ACL Name                         Applied
ACL                              Yes
(Cisco Controller) >show acl detailed ACL
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Index Dir       IP Address/Netmask              IP Address/Netmask        Prot    Range       Range    DSCP Action      Counter
     1 In         1.1.1.0/255.255.255.0         1.1.1.115/255.255.255.255    6     0-65535   443-443    Any Permit           0
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     3 Any         0.0.0.0/0.0.0.0                 0.0.0.0/0.0.0.0          Any     0-65535     0-65535 Any   Deny          51
DenyCounter : 27
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It is not necessary to allow the ports of tunnel capwap?.
I have applied this ACL and traffic from Interface XX to 190.139.109.101 is filter. If I remove CPU ACL traffic to interface XX is permit. Then CPU ACL affect all interfaces???.

Hi,
better a late reply than no reply at all ...
The CPU ACL actually filters traffic that is destined to one of the WLC ip addresses, so it works on all interfaces, but does not filter all types of traffic. Only traffic that is destined to the WLC itself.
So if you apply a CPU ACL, it is likely you need to either allow capwap ports or allow everything in the subnet where APs are.
Regards,
Nicolas

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Mar 10 20:02:02.419: DHCPD: BOOTREQUEST from 0100.1a6b.3a56.13 forwarded to 10.4.16.222.
Mar 10 20:02:10.473: DHCPD: Reload workspace interface Vlan2512 tableid 3.
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Mar 10 20:02:10.474: DHCPD: using received relay info.
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####<Oct 30, 2008 8:46:44 AM MDT> <Error> <HTTP> <rhonti> <nps-supp-gui-ms-1> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1225378004500> <BEA-101020> <[weblogic.servlet.internal.WebAppServletContext@4f2189 - appName: 'nps_history_gui', name: 'nps_history_gui.war', context-path: '/nps_history_gui'] Servlet failed with Exception
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=================Begin web.xml=======================
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
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<welcome-file>default.htm</welcome-file>
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==================End web.xml=======================

I got that error when using the request URL /myapp/ or /myapp/index.html.
Regarding,
At any way, you should map the ExtensionsFilter on the FacesServlet rather than on any url-pattern. Could you elaborate on what you mean? Maybe with an example?
Thanks, - Dave

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I attached a crappy drawing..

Hi Scott,
Thanks for your answer.
So what you are basicly saying is that I have 2 choices: 1 - disable the Proxy option on the WLC and work with external DHCP servers (internal will not work when this is enabled). 2 - Enable the Proxy option and only work with the WLC internal DHCP.
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What do you think may be different this time? The router that I am using isn't the most expencive but it is providing DHCP to other clients (wired client) with no problems.
Thanks!!!

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Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.

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- FayT is triggered as expected. (Even though this can be an issue if the page is scrollable and FayT scrolls the game away from view)
- Click inside the game ONCE
- Either wait or play around some more, but do not click again
- Once the search bar disappears, you lose focus. Pressing keys either has no effect or triggers FayT again.
Expected: The game keeps focus when search bar disappears.
Notes:
- There are other, likely similar methods to reproduce this
- Clicking a second time within the SWF prevents the focus issue to happen (I think. Maybe not with all methods ?)
- It works with other HTML pages and other SWFs. You should be able to trigger the bug even with a barebones SWF that only registers key strokes, I think.
- I didn't give you the step by step way to have focus locked in the SWF instead of away from it, but it should be similar. 2 clicks outside might fix it. Plus, I can't see a situation where this "reverse bug" would be annoying for the user.

How to Prevent CacheStore from Getting Called when Loading from DB

Hi,
I have a Cache with WriteBehind enabled. The issue is when I'm initializing the Cache from its Persistence Store (SQL Server 2005) I dont want it to call its CacheStore implementation. In the coherence book written by Alexander Seovic it recommends using another Cache to control writing to different Caches, sort of like a global flag, but that will just work in a WriteThrough scenario and not in a WriteBehind. One of my theories is to use a MapTrigger in which when i'm loading from the db I intercept the call and tell the object not write to the DB, maybe through writing directly to the Backing Map though i'm not sure if writing to the BackingMap prevents the Calling of the CacheStore. Please let me know. Tks.

Hi user13402724,
The documentation covers a scenario like this here: http://download.oracle.com/docs/cd/E14526_01/coh.350/e14509/appsampcachestore.htm#sthref512
JK

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