Here is a breakdown of some iptable commands. udp - User Datagram Protocol (streams without checking) tcp - Transmission Control Protocol (checks if destination is available) # input and output commands -A OUTPUT -d [IP ADDRESS] -o eth0 -p tcp --dport [DESTINATION PORT NUMBER] -j ACCEPT -A INPUT -d [IP...
Here is a breakdown of the crontab structure (remember to check env to see if parameters need to be set) * * * * * | | | | | | | | | +----- day of week (0 - 6) (Sunday=0) | | | +------- month (1 - 12) | | +--------- day of...
For those interesting in tackling subnetting, this topic came up at work and looked around for some vaid info. I hope this helps you the way it helped me. Download PDF ...
Here are some useful links if you are concerned about this DNS changer malware. http://www.youtube.com/watch?v=Gl7d6cDFDHo (Video breakdown of malware and resolution) http://gizmodo.com/5924272/your-internet-might-shut-off-tomorrow-because-of-a-virusheres-how-to-fix-it (Website with more info) Make sure DNS IPs in your computer and/or router do not match these before any other steps are taken: 64.28.176.0 - 64.28.176.255 67.210.0.0 - 67.210.0.255 77.67.83.0 -...
Permissions: u - User who owns the file. g - Group that owns the file. o - Other. a - All. r - Read the file. w - Write or edit the file. x - Execute or run the file as a program. Numeric Permissions: 400 read by owner 040 read by group 004 read by...
