• -A = append a rule to a chain
• -I [rulenum] = insert a rule to a chain [at position ]
• -R [rulenum] = replace a rule from a chain
• -D = delete a rule from a chain

Wikipedia: iptables
Ubuntu: IptablesHowTo
Difference between iptables -A and -I option
Linux Native Firewall : Introduction to IPtables
Iptables in linux

Ubuntu

UFW – Uncomplicated Firewall

Fedora

RedHat: Using Firewalls

BTS = Base Transceiver Station
NB = Node B
eNB = EnodeB = Evolved Node B

Wikipedia: Node B
Wikipedia: EnodeB
LTE eNB

How to Use Borders
How to center the text in a JLabel?
Swing Custom Border
Inserting padding into a JLabel
JPanel Padding in Java

Launch4j – Cross-platform Java executable wrapper
JSmooth – Java Executable Wrapper

Convert Jar To EXE, Executable File
Convert Java to EXE — Why, When, When Not and How

HP Switch Befehle Übersicht – Kurzbefehlsreferenz Procurve Switche
HP Procurve Befehlsübersich (PDF)
Configuration of HP ProCurve Devices in a Campus Environmen (PDF)

HP-2920-48G# config
HP-2920-48G(config)# no lldp run
HP-2920-48G(config)# show lldp config

 LLDP Global Configuration

  LLDP Enabled [Yes] : No
  LLDP Transmit Interval    [30] : 30
  LLDP Hold time Multiplier  [4] : 4
  LLDP Delay Interval        [2] : 2
  LLDP Reinit Interval       [2] : 2
  LLDP Notification Interval [5] : 5
  LLDP Fast Start Count      [5] : 5

Coloring texts in java
How to Use Editor Panes and Text Panes
Text Component Features

ICMP and InetAddress.isReachable()
Java InetAddress isReachable ICMP (Ping)
How To: ICMP Ping in Java (JDK 1.5 and above)

Top 5 Best System Monitoring Tools (02.11.2009)
Why is OMD the Best Open Source Monitoring Solution over Zabbix, Zenoss or Sensu (28.11.2013)

• Use Nagios to check Services (Aapche, Servers, Network, Qmail, MySQL, MemCached, Disk Space, Memory etc) Availability and Manage Alerts.
• Use Cacti to make Services (Apache, MySQL, MemCached, Redis, etc) performance graphs.

What is the difference between nagios xi and cacti for monitoring?

The main components of OMD are Check_MK, PNP4Nagios, Nagvis, and of course Nagios.

• OMD – The Open Monitoring Distribution
• The Check_MK Monitoring System
• PNP4Nagios
• NagVis
• Nagios – The Industry Standard In IT Infrastructure Monitoring

Only root can mount /dev/sdb1 on /media/sdb1 – contribute to external usb drive
Problem with cifs-util. Mount: only root can mount
mount: only root can mount — What the hell is this?

=> use the option “user”

//172.21.5.98/homes   /media/bsd   cifs   noauto,user,uid=andreas,credentials=/home/andreas/.smbcredentials,iocharset=utf8,sec=ntlm 0 0

username=bachi
password=PASSWORD