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Posted on in Networking
The following are the Peer-to-Peer (P2P) protocols recognized by Cisco's NBAR Protocol Discovery.
If I've missed any, leave a comment below or use the Slaptijack Contact Form to update me.
Thanks!
Posted on in Networking
Occasionally you might need an Autonomous System Number (ASN) that is only used on your network. The need for these should be infrequent, but it does happen.
One thing that comes to mind is a customer that connects to your network in multiple locations. That customer needs an ASN for …
Posted on in Software
Two more updates for applications based on the Horde Application Framework were released today. Once again, the product descriptions are from Jan Schneider of The Horde Project.
Posted on in Software
Sam Varshavchik has announced an updated release of the Courier Mail Server and Courier IMAP Server (Courier 20070921). Changes since the last release include
Posted on in Software
In a recent article on Read/WriteWeb about Online Office Apps, Josh Catone mentioned off-hand that he didn't like the Gmail user interface. Since I've been using the Gmail interface exclusively for quite a while, I decided it might be time to talk about the problems I have with the …
Posted on in Networking
You'll find that some network problems can only be solved by sticking a packet sniffer on the network and seeing what the packets are doing. In a switched environment, this will not work properly since each port is configured to only broadcast traffic destined for the MAC addresses it has …
Posted on in networking
One of my pet peeves is Cisco switch and router interfaces that remain unlabeled. There is nothing worse that trying to debug a network problem when the problematic interface is unlabeled. Instead of spending valuable time working on the actual problem, you've got to trace down where this cable goes …
Posted on in Networking
I've been in the situation before were I needed to discover the neighbors of a Cisco device programmatically. This is useful in a case where you want to crawl a network without hard-coding a list of devices into your script. By default, all Cisco devices have Cisco Discovery Protocol (CDP …
Posted on in Networking
If you are at all familiar with <acronym title="Simple Network Management Protocol">SNMP</acronym>, you've probably heard of "community strings". Community strings are similar to passwords. They define and grant access to a device's <acronym title="Management Information Base">MIB</acronym>. If you've used SNMP in conjuction with a …
Posted on in Networking
I've got a Class C (/24, subnet of 256 IPs) that I assign glue addresses for point-to-point links out of. Although all these little /30 subnets are in the same location, they are not guaranteed to be on the same router. So, the question is, how can I see which …
Posted on in Graphics Design
More giving credit where credit is due.
I recently had the great misfortune of opening Slaptijack in Internet Explorer. I was so horrified with how the site looked in IE, I immediately enlisted the help of Web Developer Stephen Hebert of Acadian Imaging. Generally, I prefer to figure these sorts …
Posted on in System Administration
This comes up pretty infrequently, but I think it's worth knowing. I specifically had a situation where I was greping hostnames out of a file. Personally, I like hostnames to appear in all uppercase, but this file was full of hostnames in all lowercase. You can solve the problem with …
Posted on in Networking
Generally speaking, a route server is a network device that does not participate directly in routing, but carries an entire routing table that other devices may refer to. Often times, this is a router that carries the entire Internet BGP routing table (currently over 220,000 routes).
More commonly, a …
Posted on in Graphics Design
Without much fanfare, Slaptijack broke into the Alexa Top 1,000,000 web sites earlier this week. Although the Alexa ranking is notoriously inaccurate, it does give some gauge of a site's popularity.
Since Alexa relies on their toolbar to determine the reach of a website, I'd like to thank …
Posted on in Software
Internet Systems Consortium, Inc., makers of the popular BIND <acronym title="Domain Name Service">DNS</acronym> server and INN Usenet server, has announced the End of Life for BIND 8 . I received an email from ISC on this topic earlier in the month, but I wasn't aware that the <acronym …
