I use the atftpd tftp server daemon. For the most part, it is an easy package retrieval. However there are some custom security and directory settings. Continue reading "TFTP Installation with ATFTPD" »
Thursday, May 10. 2007
TFTP Installation with ATFTPD
Installing Asterisk
It has been a year or two since I last worked with the Opensource PBX solution called Asterisk. Instead, I've been doing stuff with Cisco Callmanger and Voice Gateways for the last while. My support pages are still receiving regular hits with regards to Asterisk Support, so I think I should do more with it. I've got a bunch of scripts laying about that I'd like to resurrect. Continue reading "Installing Asterisk" »
Wednesday, May 9. 2007
Various Perl Based Proxy Tools
In perusing Debian's Package List, I came across a number of Perl based Proxy tools.
The first one, an item that sounds interesting, but havn't thought of a way to put it into
action yet, is an HTTP Recorder. HTTP::Recorder
is a browser-independent recorder that
records interactions with web sites and produces scripts for
automated playback. Recorder produces WWW::Mechanize
scripts by default (see WWW::Mechanize
by Andy Lester),
The next item is an HTTP Tunnel. httptunnel creates a bidirectional virtual data connection tunnelled in HTTP requests. The HTTP requests can be sent via an HTTP proxy if so desired. This can be useful for users behind restrictive firewalls. If WWW access is allowed through a HTTP proxy, it's possible to use httptunnel and, say, telnet or PPP to connect to a computer outside the firewall.
The third item is HTTP::Proxy. It is a Perl based HTTP Proxy. It sounds like it can do some SSL type interception as well. It has an ability for add-on modules allowing various parts of a page to be re-processed prior to delivery back to a user.
Redirecting a Web Page
I've encountered a number of ways to redirect a web page. If all you have access to is a web page, then a meta tag is the way to go: Continue reading "Redirecting a Web Page" »
Upgrading Nfsen and Nfdump
As an update to my two articles for installing nfdump and installing nfsen, here are a few corrections and a process for upgrading. Continue reading "Upgrading Nfsen and Nfdump" »
Tuesday, May 8. 2007
Determiniing Space Used in SubDirectories
When space is getting tight, one has to find out where the space is being used. Sometimes it suffices to find where the most accumulation is and cleaning that up. To find that accumulation, use the du command: Continue reading "Determiniing Space Used in SubDirectories" »
Removing lots of files
If I don't have a clean up program running, sometimes autocollected files tend to accumulated. For example, netflow processing on 5 minute intervals can accumulate a large number of files. An 'rm' with a partical wild card seems to complain. Continue reading "Removing lots of files" »
Monday, May 7. 2007
Importing a Blosxom Blog into Movable Type
I have my Blosxom based blog organized by category directories rather than by date. I've written a Perl script to take this collection of articles and transform them into a MovableType import file. My content files have a .txt extension. You'll need to change the match string if your extension is different from mine. Continue reading "Importing a Blosxom Blog into Movable Type" »
Security Enhancements for Remote Access at Microsoft
Here is a link to a paper that has a bunch of useful stuff in it regarding Microsoft VPN's, IAS (Internet Authentication Server), security scripting, and Windows 2003 based Remote Access Infrastructure: Security Enhancements for Remote Access at Microsoft: Technical White Paper
User Certficate Auto Enrollment
With my 802.1x test setup, machine certificates were being sent to domain machines with no problem, but user certificates were not showing up.
In the group policy object, right on the container housing the users that needed certificates, I set the auto-enrollment settings. For some reason things weren't being inherited from the domain default policy. The group policy container is User Configuration -> Windows Settings -> Security Settings -> Public Key Policies -> Autoenrollment SEttings. The 'Enroll Certificates Automatically' needs to be checked along with it's two subsidiary check boxes.
The following command serves as a manual refresh of the policy:
gpupdate /target:user
Enrollment will take several minutes. Running the certmgr.msc mmc snap-in will allow one to check that the certificate has arrived in the Personal -> Certificates store.
The Application Event Log will contain success/failure status for the auto-enrollment.
I also found out from an troubleshooting auto-enrollment article, that domain users without email addresses will not auto-enroll. They don't need an actual email box, just an entry in the email attribute in Active Directory.
As further reference, Microsoft has an article on How Autoenrollment Works. There are other related and helpful articles in the same library section.
Movable Type Links
Here are some links to various pages in Movable Type that look useful: Continue reading "Movable Type Links" »
Sunday, May 6. 2007
I Hate PHP on a database call.
I think this is the second time I've been caught on this. And I should have recalled the second time around to check this. Continue reading "I Hate PHP on a database call." »
apt-get: Managing Packages
In a few of my earlier articles regarding upgrading and updating a Debian system, I missed a few key facts. Continue reading "apt-get: Managing Packages" »
Saturday, May 5. 2007
Post Processing NMAP2Nagios Output
nmap2nagios is a module available from Nagios ExchangeK (I seem to recall). From an nmap based network scan, it generates information useful for import into Nagios. I needed to muck with the output somewhat in order to remove redundant references and other stuff. I'm sure there is a better way to do this, but this what I ended up with. If nothing else, it was a good introduction to the command line edit utility 'sed'. Continue reading "Post Processing NMAP2Nagios Output" »
Friday, May 4. 2007
Configuring eSensors with Nagios
The EM01B WebSensor from Esensor (http://www.eesensors.com/websensor.html) provides Temperature, Humidity, and Illumination values to Nagios.
Continue reading "Configuring eSensors with Nagios" »