In Windows Server 2008 R2 the TCP Offload Engine TOE will be enabled by default, however WS2008 is shipped turned off for some reason.
To Enable it, run the following netsh command from a elevated command prompt:
netsh interface tcp set global chimney=enabled
What this does is it moves the processing over to the network adapter, however the NIC needs to have the appropriate capabilities to offload the entire network stack.
Best thing to do is test it first and then implement it.
Also note, don’t bother making this change in a VM guest machine.
XSS-Me is the Exploit-Me tool used to test for reflected Cross-Site Scripting (XSS):
SQL Inject Me is the Exploit-Me tool used to test for SQL Injection vulnerabilities.:
The default firewall configuration tool for Ubuntu is ufw. Developed to ease iptables firewall configuration, ufw provides a user friendly way to create an IPv4 or IPv6 host-based firewall.
NOTE: ufw by default is initially disabled.
# ufw enable
Turn off firewall:
# ufw disable
Show current status rules:
# ufw status
Allow 80/tcp to any IP on this host:
# ufw allow 80/tcp
Delete above rule
# ufw delete allow 80/tcp
You can also do more complex rules like:
# ufw allow proto tcp from 18.104.22.168 to any port 25
More Info at Ubuntu Documentation:
Sudo (su “do”) allows a system administrator to give certain users (or groups of users) the ability to run some (or all) commands as root while logging all commands and arguments.
Ubuntu uses the SUDO method, if you want to use sudo and the sudoers file in Debian you will need to install it e.g. aptitude install sudo
Then edit the sudoers file at /etc/sudoers and add users/groups to it for that user/group.
More info at:
Sample file: http://www.sudo.ws/sudo/sample.sudoers
Another example: http://www.go2linux.org/sudoers-how-to
A very common task to do on Linux systems is to backup files and folders to a single zip file.
Another task you might want to do is package up a directory and send to another host.
Here is a great site with examples and explanations on using tar and gzip:
To backup all the files and folders in my home folder and store them into a folder called backup with a compressed file called homebu.tgz issue the following command:
[email protected]:~$ sudo tar -czvf /home/keith/backup/homebu.tgz /home/keith/
Use the Shred command to wipe data in Linux:
$ sudo shred -zn10 /dev/sda # to wipe a partition/drive
$ sudo shred -zn10 -u -v /home/fred/filedoc.txt # to shred and remove a file or files
Shred can be used to shred a given partition or a complete disk. This should insure that no data is left on your disk.
Microsoft’s “Scheduled Tasks” codes …. what do they mean?
When you see the result of a scheduled task it might say something like this:
0x0 or 0x1 or 0xa
See this MS KB article to explain and troubleshoot Scheduled Tasks: