In PuTTY, right-click on the mouse is configured to automatically pastes the contents from the clip-board. While this is a great convenience, it is equally dangerous when you are logged onto live production systems. Have you pasted “reboot” and pressed enter without realizing what you’ve done??
Category: Windows
SolarWind Advanced Subnet Caculator for Classless subnet & CIDR calculation
Advanced Subnet Calculator from SolarWind is a simple but powerful easy to use Subnet Calculator for Windows.
Advanced Subnet Calculator can perform
whois lookups for hostnames and Domain Names
IPWhois Lookup for the provided IP Address
Classful Subnet Calculator
Claseless Inter-Domain Routing (CIDR) Calculator
Address Generator for a given IP Address and Subnet Mask
How to fix Exchange & Outlook connection issues over IPSec VPN
Recently we had this problem with this problem with an Exchange 2003 server in the HQ and Outlook Clients in a particular branch office. The Branch office connects into the HQ through a site to site IPSec VPN using Juniper Netscreen SSG20 firewalls on either end of tunnels.
The Problem
The Outlook clients would connect OK but suddenly loose connection to the Exchange server and never connect back. The Outlook Client status will say "Disconnected". The client PCs will however be able to ping the server and network connections look OK. This happened in random times and sometimes when sending large emails.Dr.TCP – Fine Tune TCP/IP Parameters including MTU in Windows
Dr.TCP is a simple but powerful utility that can let you fine tune the TCP/IP parameters for your Network Interface Card (NIC). It works on Windows XP, 2003,2000.
Dr.TCP takes the hassle out of editing the Windows Registry and modifying keys to fine tune the TCP/IP Parameters at
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<AdapterID>]
mturoute – Free utility to find the MTU Value to a host or IP Address
One of the most important thing that is ignored most of the time while troubleshooting a network problem to a host or a network is checking the MTU related issue. This makes more sense in situations like troubleshooting VPN related issues.
MTUROUTE is a small but smart utility that uses ICMP pings of various sizes in order to determine the MTU values (Maximum Transmission Unit) on the path between itself and the target system. MTUROUTE can operate in normal mode where it sends multiple ICMP packets to each hop on the path to identify the smallest MTU between the host and hop or in a Traceroute mode where it will attempt to determine the lowest MTU between the local host and each hop in the communication.
It is important to note that care has to be taken as it generates muti fold ICMP traffic as it tries to determine the MTU Values.
File Shredder – Free Opensource tool to Secure File Destruction
Secure destruction of data like personal details, banking information, confidential company information or critical customer data when they are no longer required is very important to information security for the simple reason that they can always be recovered in many ways from the hard disk. This is even more important when you sell or throw away your old PCs. Simply deleting the files from the PC doesn't really remove the files for good. They can always be recovered. FileShredder just protects you from that. File Shredder is an opensource free file secure destruction software for permanent removal of critical confidential files from the hard disk. With File Shredder you can remove files from your hard drive without fear they could be recovered. File Shredder has been developed as fast, safe and reliable tool to shred company files.