Useful Network Links
These are some useful links that I use for gathering information
about networks in my day to day job as a networking consultant
- Everything you ever wanted to know about a particular DNS, Domain or IP Address.
- Everything you want to know about a UK place and also does funky coordinate transformations.
- A Netmask/Broadcast Address/Network Address
- A nice reference site with the IP,
IPV4 protocol options and formats displayed nicely and fully. It
has other IP Suite
references as well (eg a large list of standard
- Internet Query
Tools hosted at Demon. These
tools allow you to find out compehensive information on a host,
domain or an IP address.
- Spam Tracker This
is a quick and dirty general purpose internet address lookup thingy
that will also tell you whether it is a known source of spam.
is another way of finding out whether an IP address is on the spam
- Verify MX record
accessibility. This link allows you to determine whether a domain
has some MX records and whether they are all likely to work.
- Smurf Amplifier Registry
A place where you can find out whether your network can be used for
smurf attacks. It contains a database and checking CGI.
Virus/Trojans List this is a useful little list of TCP/UDP ports
that are used in probes against remote systems and the names of the
programs that do it.
- "What does
my firewall mean when it says..."An explanation of which ports do
what in a firewall log. There are links off to other useful
information pages from here as well.
IP Protocol Numbers This is a list of the assigned values of the
PROTO field in an IP header.
Well Known Port Numbers This is a list of the
of the well known port numbers either assigned or registered with
IANA. If you want a 'complete' /etc/services file (unlike the one
you probably have been supplied with) you can cobble it together
UK Telephone Code Locator Find out where someone in the UK is telephoning
from when you dial 1471.
- Fire Forensic CDROM is a freely
downloadable ISO image containing a linux kernel + windows binaries
for conducting forensics (or maintenance) on a machine that has
been infected or otherwise failed.
- SysInternals has a range of
free M$ exploration and monitoring tools as do
I am always on the lookout for useful network exploration facilities, if
you have such then please let me
Copyright © 2001 Dirk Koopman, Tobit Computer Co Ltd. All rights reserved
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