Technology Errors

xplico pcap File Upload Fails

I have been playing around with xplico which is a NFAT (Network Forensics Analysis Tool) tool included in Backtrack Linux. Pretty cool application though there are some things I am still figuring out or may be caused by the version be older in Backtrack. One of the main items where I could see new users to Xplico running into is actually noted numerous times on Xplico’s website and so I simply wanted to expand on what has already been noted there. If you are having issues uploading pcap files via the Xplico web interface then it is likely related to the size of the pcap file and the size that the Apache web server will accept. Use the information below to modify the web server configuration to allow larger files to be uploaded.

Technology Insights

Create MySQL User With mysqladmin

When setting up a server or group of servers for the first time you may find yourself wanting to create MySQL users without having to login to MySQL. It would make sense for the mysqladmin command to offer this functionality but it does not. Instead you can create the MySQL user with the mysql command as shown in the below example performed on a server running Ubuntu Linux 12.04  also known as Precise Pangolin.

Technology Insights

Remove Amavis Content Filter From Postfix Configuration, Requeue All Postfix Email Messages

I installed ISPConfig awhile back on a web hosting server that at one point also hosted email accounts. I recently moved all of the email to a different server and wanted to cut down on CPU and memory usage so I needed to disable amavisd, clamd, courier-imap, and courier-authlib. These services provided a way to receive email via POP3 and IMAP as well as content filtering and virus scanning for all of that email. So after shutting all of the services down I needed to remove the reference to the local content filter from Postfix because if amavis is shut down and mail is sent from a web application to the localhost then the connection will be refused and Postfix will not send the email. Below I describe the Postfix configuration lines to comment out as well as a way to reload all of the queued email into the Postfix queue so it could be sent again.