The ranting of an IT Professional:

Cisco


February 25, 2010  4:30 PM

Cisco 1411 Wireless bridge – Radio interface won’t come online



Posted by: Jason Tramer
bridge, Cisco, disabled, interface, non-root, radio, reset, root, Wireless

This gave me some issue the other day. I was setting up two Cisco 1411 wireless bridges to connect to each other for the first time. One was root bridge, the other set as non-root bridge. After i set them up I was checking the web interface of the non-root bridge and the Radio interface was...

February 12, 2010  2:56 PM

Cisco router not handing out DNS server to DHCP clients



Posted by: Jason Tramer
Cisco, client, DHCP, DNS, pool, router, server

I had a weird issue yesterday. I had a Cisco 1800 series router that was configured to hand out DHCP and up until a few days ago everything worked fine with it. Then suddenly out of the blue it still handed out DHCP but did not hand out the DNS-Server option even though it was configured. I...


December 16, 2009  2:17 PM

Adding a secondary address to an interface on a Cisco ASA



Posted by: Jason Tramer
address, arp, ASA, Cisco, interface, IP, route, secondary, static

Unlike in a Cisco router where you can used the secondary command to add a secondary address to an interface, the Cisco ASA does not support this. Here is a workaround however. 1. First find out the mac address of the ethernet interface you will be using: sh interface Ethernet0/1 This should...


December 13, 2009  12:11 AM

Cisco 881 Router crashes



Posted by: Jason Tramer
12.4.24t1, 12.4.24t2, 881, Cisco, crash, memory leak, router

I was recently working with a Cisco 881 router that kept having memory leaks and crashing. At first it would only crash once a day or so but eventually it started crashing hourly. I went through serveral different firmware versions and finally found one that fixed the issue. The last version I...


December 3, 2009  3:41 PM

Configure Active-Standby High Availability on a ASA



Posted by: Jason Tramer
active, Add new tag, ASA, ASDM, Cisco, CLI, HA, High Availability, standby, wizard

Ok so you can easily do this from within the ASDM using the HA wizard, however I recently tried this and had issues with the wizard not working for me. So here is how you do it from the cli: Primary: failover failover lan unit primary failover lan interface failover Ethernet X failover key...


December 1, 2009  12:46 AM

Security hole for SSL Clientless VPN



Posted by: Jason Tramer
Cisco, Security, VPN

Check out this article: http://www.theregister.co.uk/2009/11/30/vpn_authentication_weakness/ This is quite big news. Cisco has been pushing it's clientless SSL VPN pretty hard.


November 30, 2009  4:11 PM

Scheduling commands on a Cisco router



Posted by: Jason Tramer
Add new tag, Cisco, kron, router, schedule, scheduling

I recently needed to schedule nightly reboots for a Cisco router and I found this article very helpful. http://articles.techrepublic.com.com/5100-10878_11-5553313.html


November 30, 2009  4:09 PM

Incompatibility on Site to site VPN tunnels between Watchguards and Cisco ASA’s



Posted by: Jason Tramer
ASA, Cisco, VPN, WatchGuard

I have been working with a client with multiple sites and up until recently they have been using Watchguards at all sites. Recently we have been switching out some of the Watchguard for Cisco ASA's but there have been a ton of site to site VPN issues. For example, a tunnel goes down, so you re-key...


November 26, 2009  10:40 PM

Cisco ASA L2TP issues with LDAP authentication



Posted by: Jason Tramer
ASA, CHAP, Cisco, Ipsec, L2TP, LDAP, PAP, PPTP, RA, Remote Access, ssl, VPN

So I configured my ASA to provide L2TP remote access VPN. I originally set it up with a local user database and it worked fine. After I decided to tie it in to LDAP so I could authenticate against Active Directory. I set up my LDAp integration and used the built-in test tool to make sure it worked,...


November 26, 2009  3:43 PM

Setting up WAN Failover on a Cisco ASA



Posted by: Jason Tramer
ASA, Cisco, failover, WAN

Here is a useful link I found for setting up WAN failover on a cisco ASA. http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a00806e880b.shtml Bear in mind you need a security plus license on a 5505 or 5510 for this to work.


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