Category: Cisco
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Cisco NAT FTP to same IP as Overload
The idea for this tutorial is you only have a /30 on our outside interface. You have an FTP server on the inside of your network you want to make publicly accessible. What we are going to do is NAT the FTP port on the outside interface to our FTP server on the inside. We…
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Cisco IRB – Bridging on a Cisco Router
IRB is Integrated Bridging and Routing. Bridging is synonymous with switching, as a bridge is roughly equivalent to two ports of a switch. Sooo, what this allows us to do is to set a couple of ports on a router to bridge across. You can also create a BVI (Bridge Group Virtual Interface) interface that…
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Cacti Video Tutorial Netflow / Flowviewer
I wasn’t initially clear enough, so here is meat and potatoes explanation of netflow, then it will get into the history: Imagine a user in your network is downloading a huge file from somewhere on the internet. Now imagine you are exporting netflow information from your internet router and collecting it on your cacti box.…
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Adding Ringtones to CallManger 4.X
Occasionally, you just have to make an interesting ring tone. My favorite is to take the popular Youtube video and pull out excerpts, make a ring tone, then sneak it on someone’s phone…:) I’m a classy guy, what can I say? So, I use Audacity Portable to chop up my file. Once I have it…
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Cisco ATA 186 Setting Static VLAN – Tool to Calculate VLAN Value
If you are going to setup an ATA in a network that is non Cisco(sans voice vlan on switches), then you will need to manually configure your ATA to support the Voice VLAN. The easiest way is to let you ATA pull DHCP and configure it via the web interface: http://192.168.1.100/dev If you want to…
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ASA Crypto Map Ordering
A friend of mine was telling me about an ASA issue he was having. His LAN-to-LAN tunnels would establish and cause intermittent connectivity issues. He would be able to only get to some subnets on either side of the tunnel. It wasn’t always the same subnets, nor would it always happen. His ACLs were the…
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Use Asterisk as an SRST (Survivable Remote Site Telephony) Gateway with Cisco CallManager
What is this and why do I need it? Here’s the scenario. You have a central office with five remote offices. You run Cisco CallManager at the central office and you simply deploy phones out at the remotes to use the central Callmanager. This saves you money by using a single call server. Now imagine…