Archive for 'General' Category
Best compression using tar and 7z
Compress using tar and 7z $ tar cf – <source folder/file> | 7z a -si <Destination archive>.tar.7z $ 7z x -so yourfile.tar.7z | tar xf – -C target_dir Reference:1. http://askubuntu.com/questions/300097/how-do-i-create-tar-7z-file-from-the-command-line 2. http://askubuntu.com/questions/341628/how-to-extract-tar-7z-files-from-command-line
Converting OVA to QCOW2 for use with QEMU/KVM
Extract the .ova file $ tar -xvf file.ova Convert the .vmdk to .qcow2 $ qemu-img convert -O qcow2 file.vmdk file.qcow2 Reference: http://edoceo.com/notabene/ova-to-vmdk-to-qcow2
Block Inbound for Ports 135, 445, 1028 and Ping (ICMP 8) for Windows 7, 2008 Server
For workstations/servers that are public Internet facing and do not have a hardware/software firewall solution, use Windows Firewall with Advanced Security and block port 135, 445, 1028 and PING (ICMP 8) . GRC’s Shields Up! shows these ports as being open. Reference: https://www.grc.com/x/ne.dll?bh0bkyd2 http://www.rackspace.com/knowledge_center/article/creating-an-inbound-port-deny-rule-for-windows-firewall-windows-2008
Check Linux with rootkithunter and chkrootkit
Debian Linux # apt-get install chkrootkit rkhunter OR # aptitude install chkrootkit rkhunter CentOS 6.x # yum install chkrootkit rkhunter
Import Active Directory Domain Services Cmdlets
Open Powershell Prompt PS C:\> Import-Module active*PS C:\> Get-Command -Module active Reference: http://blogs.technet.com/b/heyscriptingguy/archive/2010/01/25/hey-scripting-guy-january-25-2010.aspx
Resetting the ESX host firewall policy in ESX 4.x
Resetting the ESX host firewall policy in ESX 4.x You cannot stop the firewall service in ESX 4.x. If you try, you see themessage: Firewall can’t be stopped. To disable the firewall run: esxcfg-firewall –allowIncoming –allowOutgoing You can allow all packets through the firewall by running the command: $ esxcfg-firewall –allowIncoming –allowOutgoing To return the […]
create backup of entire filesystem with tar and bzip compression
# tar -cjvpf backup.tar.bz2 –exclude=backup.tar.bz2 –exclude=proc –exclude=sys –exclude=dev .
dd using netcat to /dev/sdx / or from/to image file
destination: # nc -l 19000 | bzip2 -d | dd bs=16M of=/dev/sda source: # dd bs=16M if=/dev/sda | bzip2 -c | nc serverB.example.net 19000 Reference:http://www.ndchost.com/wiki/server-administration/netcat-over-ssh OR dd from source partition to destination image file destination: #nc -l 19000 | bzip2 -d | dd bs=16M of=/path/imagefile.dd source: # dd bs=16M if=/dev/sda | bzip2 -c | nc […]
Reset iptables firewall
# /sbin/iptables -F# /sbin/iptables -X# /sbin/iptables -t nat -F# /sbin/iptables -t nat -X# /sbin/iptables -t mangle -F# /sbin/iptables -t mangle -X# /sbin/iptables -P INPUT ACCEPT# /sbin/iptables -P FORWARD ACCEPT# /sbin/iptables -P OUTPUT ACCEPT
Online Anti-Virus Websites and Tools
Free online service that analyzes files enabling the identification of viruses, worms, trojans and other kinds of malicious content detected by antivirus engines and website scanners http://www.virscan.org http://virusscan.jotti.org http://vscan.novirusthanks.org http://www.viruschief.com http://www.metascan-online.com https://www.virustotal.com http://www.garyshood.com/virus http://online.drweb.com/ http://www.threatexpert.com/filescan.aspx http://www.clamwin.com/content/view/89/85 Free service that analyzes and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware. http://ScanURLs.com […]
