Ryan's Random Ramblings ← Random notes about technology, (motor)bikes, and whatever's on my mind

Managing VPNs from the CLI in Linux

Mar

14

2013

Since I have finally made the switch on my work laptop to use Linux (Ubuntu 12.10) as my primary OS, I have found a few bugs that slow me down on a regular basis. One of the bugs is that the nm-applet will stop working correctly and won’t let me make any changes to the ...

Kegerator Build Part 2: Adding a tower 3

Nov

11

2012

Adding a tower I wrote up my initial kegerator build here and promised more details when I added a tower. Well, I didn’t do any documentation during my tower install and I took forever to even take pics of the finished project, but I finally did take a few pics, so here is a quick write-up ...

Kegerator Build Part 1: Converting the Fridge 22

Jul

20

2011

I found a good deal on CraigsList for a small GE fridge that I have been able to convert into a 2 corny kegerator. It is GE model WMR04BAPBB. I have not added a tower to it yet, but do plan on adding that in the future. There is a diagram on the back of ...

Juniper to Cisco VPN

May

19

2011

In order for a VPN to work between Cisco and Juniper, each subnet needs to be defined on the Juniper firewall as a proxy-id. The juniper firewall also requires “policies” to be created to allow all of this traffic. Two policies are necessary for each local to remote subnet – one for each direction the ...

Decrypt Pre-shared key for Cisco IPSEC VPN

May

18

2011

There are a couple ways to retrieve a pre-shared key for a Cisco IPSEC VPN. The easiest way is to actually get it from the running config on the ASA. Unfortunately using a show run will only give you asterisks for the PSK, but you can use this command to see the PSK in the ...

Juniper ScreenOS troubleshooting

May

17

2011

Traffic flow debugging This is the most common way that I have set up debugs to determine what is happening to the traffic: set ff src-ip [source ip] dst-ip [dest ip] clear dbuf debug flow basic get db stream The first line (set ff…) is not necessary, but is very useful to limit the debug ...

How to use sed to replace a string in multiple files

Apr

18

2011

Using sed, it is possible to do a search and replace across one or many files. The syntax is as follows: sed -i 's/search/replace/g' [filename] The -i option does inline editing so that the file is actually edited. Without the -i, the file is not edited, but the replacement is printed to the screen. The ...

Chrome OS laptop – Cr-48

Dec

19

2010

I had an excellent surprise today when my neighbor rang my bell to let me know a couple packages had been mistakenly delivered to his house last week. If that wasn’t enough of a surprise, when I opened the boxes, my jaw hit the floor upon realizing that one of them was a brand new ...

Brewing Beer

Nov

19

2010

I recently got a beer brewing kit for my birthday and started my first batch the other day. I’m starting with a Dunkelweizen as it was listed as a beginner recipe, the fermentation temperatures are within easy range without a refrigerator, I like german wheat beers, and it’s the time of year for darks. Is ...

Upgrade ESXi 4.0 to ESXi 4.1

Aug

1

2010

Prior to the upgrade, a backup of the ESXi configuration is recommended. This backup can be done using the vicfg-cfgbackup command that is part of the ESXi CLI. The CLI can be installed in Windows or Linux.