Available is a simple whois Applet that will probe any server on the Internet to tell you if it is available/up/running. It does a ping probe via ICMP (Internet Control Message Protocol) and the UDP (User Datagram Protocol) echo port 7. The server may appear to be unreachable if your firewall blocks these probes. Available also probes the home HTML (Hypertext Markup Language) page via TCP/IP (Transmission Control Protocol/Internet Protocol) port 80. As a side effect, it will tell you the IP (Internet Protocol) address given the host name, or the host name given the IP address. You can also run it as a standalone utility:
I don’t have a proxy server myself, so I have not been able to experiment with getting Available to work with one. It may simply be a matter of setting some Java properties with the -D option on the command line. It would probably be easier for you to experiment with Available run as a standalone utility than an Applet. In my opinion, proxy servers should be transparent to applications. The current proxy interface sounds like the work of teenage programmers who live on cheap pizza and don’t change their underwear. If you are successful at getting proxies to work with Available, please pass on what you did.
Here is what Oracle has to say about proxies.
❘ precis ❘ screenshot ❘ browse source repository
for the current version of Available.
WhoIs to check if a server is available/up.
698K zip for Available Java source, compiled class files, jar and documentation to run on your own machine either as an application or an Applet.
Runs on any OS that supports Java e.g. W2K, XP, W2003, Vista, W2008, W7-32, W7-64, W8-32, W8-64, W2012, Linux, LinuxARM, LinuxX86, LinuxX64, Ubuntu, Solaris, SolarisSPARC, SolarisSPARC64, SolarisX86, SolarisX64 and OSX.
First install the most recent Java.
To install, extract the zip download with WinZip, (or similar unzip utility) into any directory you please, often J:\ — ticking off the use folder names option.
To check out the corresponding source from the Subversion repository, use the TortoiseSVN repo-browser to
After you have installed the jar, you can run it as an application. Type:
java -jar J:\com\mindprod\available\available.jar
adjusting as necessary to account for where the jar file is.
download ASP PAD XML program description for the current version of Available.
Available is free. Full source included. You may even include the source code, modified or unmodified in free/commercial open source/proprietary programs that you write and distribute. Non-military use only.
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