11 The weakness that often is not realized Network Admin

The threat of breaking into the network system not only coming from the hackers, people in the company's own staff alias could do it. Of course this requires an alertness of an admin to maintain the company's network security system in order not be penetrated. Here are 11 things that the writer can become a special concern for the reliability of the system admin for a network security company where you work to stay awake:

1. Gullible and too trusting to the user / user you are, especially the female staff or friends who ask for help.
2. Building and the access door entrance / exit that is not safe.
3. Documents and computer disks or peripherals that have not been destroyed or not destroyed at the time was thrown into the trash can be read by others.
4. A weak password or even the network does not use a password system altogether.
5. Defense network that is less strong because there is probably no firewall and so forth.
6. Access controls are weak, missing files and some that should not be given access to users who do not need.
7. The system does not do patches.
8. Authentication and disclosure of information a web application is not done haphazardly.
9. Wireless system running with the default settings and without WEP, WPA or WPA2, is very risky and easy to dijebol.
10. To enable SNMP host tissue in a state of default or just use guest mode to the community so it is easy to dijebol.
11. Using a firewall, router, remote access and dial-up equipment in a state of default or password guest or using passwords that are too easy, because this entrance into the system hackers.
    

Below is some port that is very often performed penetration (hacking) by mischievous hackers and staff to try hacking into a network security system:

• TCP port 20 and 21 FTP (File Transfer Protocol)
• TCP port 23 Telnet (Terminal Emulation)
• TCP port 25 SMTP (Simple Mail Transfer Protocol)
• TCP and UDP port 53 DNS (Domain Name System)
• TCP port 80 and 443 HTTP and HTTPS (Hypertext Transfer Protocol)
• TCP port 110 POP3 (Post Office Protocol version 3)
• TCP and UDP port 135 RPC
• TCP and UDP ports 137-139 NetBIOS over TCP / IP
• TCP and UDP port 161 SNMP (Simple Network Management Protocol)
  

Similarly, I hope some of this information can be used as reference for the network admin for more care in securing their computer systems and networks.