iptoolb2.zip 142.4 kilobytes
IP Search Toolbar is a floating toolbar offering dns / reverse lookups, Finger, Ph (can update Ph server list automatically), Whois, Ping, Time (can set system clock), and a very fast multiple address ping (scan). Supports SOCKS 4 (not for Ping, which uses ICMP). Extensive config. options
netlab95.zip 455 kilobytes
Gives youFinger, Whois, Clock Synchronization, Ping, Traceroute, DNS lookup, and Port Scan functions from a single interface. You can even find out the time of day at a remote host's location.(Unfortunately many Internet Providers have blocked most of these options, but it`s still a useful tool)
setupipcalc2.exe 407.4 kilobytes
Provides all the information you need to know about IP addressing. Enter an IP address and the number of subnet bits you wish to use and it will display what subnet mask to use, the number of available host IP addresses, the individual host number, etc.
spade110.exe 924 kilobytes
Sam Spade is an integrated multi-threaded network query tool for Windows 95 and NT4.0, it provides the following (and a few other) functions:
PING: ping a network host to see if it's alive, and to see how long it takes packets to get there and back.
NSLOOKUP: find the IP address from a hostname, or vice-versa.
WHOIS: ask a whois server who owns a domain name, Sam Spade will usually ask the right whois server automatically, or you can query a particular server.
IP BLOCK WHOIS: ask a whois server who owns a block of IP addresses, it now supports IP block queries via whois.arin.net.
DIG: a more advanced DNS query tool, DIG asks a DNS server for all the information it has about a host.
TRACEROUTE: find the route packets take between you and a remote system.
FINGER: lookup user information on a remote unix system.
SMTP VRFY: ask a mail-server whether an e-mail address is real and whether it's being forwarded to other addresses.
WEB BROWSER: browse the web, viewing the raw HTTP traffic/headers rather than the rendered HTML, very handy for debugging CGI scripts, it will not send any identifying information to the webserver, and by not supporting file download, java, javascript, cookies or anything else it has far fewer security holes than real browsers, as it doesn't render the HTML it makes attempts to hide information (such as hidden form fields, white-on-white text, meta fields etc.) obvious, these make it a useful tool for investigating malign web sites.
KEEP-ALIVE: sends http packets to your ISPs webserver every minute or so, to keep a dialup link active.
DNS ZONE TRANSFER: this asks a DNS server for all the information it has about a domain.
SMTP RELAY CHECK: this checks whether a mailserver is secure. It attempts to send e-mail back to yourself via somebody elses e-mail server (one which you're not supposed to have access to). Hopefully it'll fail, but if it doesn't the mailserver is open to all sorts of abuse and the administrator needs to secure it.
USENET CANCEL CHECK: this asks your local news-server to look for cancelled messages in a set of groups.
WEB SITE DOWNLOAD: this will copy a web site to disk.
WEB SITE SEARCH: this searches a web site for anything matching a list of patterns.
E-MAIL HEADER ANALYSIS: this will check the received lines in an e-mail header for consistency, it can help in tracking down the true source of forged e-mail.
Things to be aware of: SMTPport probing is impolite, and some might claim illegal, so be nice with it. Use it only on systems you suspect of being used as relay sites. Scanning ports will trigger some cracker detecters Scanning all the ports on a machine simultaneously puts a high load on your system, which seems to give some winsocks indigestion. The cancel search puts a high load on the newsserver, so if you're using your ISPs newsserver check during quiet times The web crawler is very, very dumb. It's intentionally so, but you do need to keep an eye on it. It ignores all robot exclusion protocols (that will be optional eventually), so will happily chase down infinite trees. It's a sharp tool, use it carefully. A list of simiair tools for other operating systems can be found here