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Author Archives: Adam
Create ACL Rules with Wireshark
I stumbled onto this wireshark feature by accident really but thought I would share a little bit about it. Essentially what wireshark does is allows you to review all the captured packets and then a single packet in more detail. Continue reading
Posted in Networking, Security Tagged networking, packet capture, security, testing, trouble shoot Leave a comment
Best PHP 101 Function
I was explaining to a friend the other day how to best debug PHP scripts. There are of course debugging modules that can be bolted in or other specialty IDE tools. However, since this guy was new to the language and to programming in general I figured I would cut all of that out and make it simple and easy. With PHP the alternative is to dump information out to the screen and read it from there. I shared with him my all time favorite, most used, yet simplest PHP function for doing this. It looks something like this: Continue reading
Cisco Two or More IP Addresses
I wanted to take an opportunity to share an experience I had recently and explain how I resolved it. The situation I walked into was quite ugly. A small consulting firm had helped install some new switches at a medium sized business. They basically did a rip and replace. Before the replacement the network was configured with four VLANs; One VLAN for IP cameras, IP Phones, a few isolated APs, and of course corporate PC data. The bad news was that the fly-by-night consulting firm had a tech on this job that knew nothing about VLANs. Can you see the … Continue reading
Keeping Time on Cisco IOS
When doing any type of troubleshooting I am big on log files. To get the most out of your log files, however, you need the time stamps to be accurate. For time stamps to be accurate you need to ensure your systems are all running with exactly the same time Continue reading
Posted in Networking Tagged cisco, configuration, IOS, logging, networking, trouble shoot Leave a comment
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