Free connectivity software for linux

Haskell Database Connectivity project provides an abstraction layer between Haskell programs and SQL relational databases. This lets you write database code once, in Haskell, and have it work with any number of backend SQL databases (MySQL, Oracle, PostgreSQL, ODBC-compliant databases, etc.)
HDBC is modeled loosely on Perls DBI interface http://search.cpan.org/~timb/DBI/DBI.pm, though it has also been influenced by Pythons DB-API v2, JDBC in Java, and HSQL in Haskell.
HDBC is a from-scratch effort. It is not a reimplementation of HSQL, though its purpose is the same.
Main features:
- Ability to use replacable parameters to let one query be executed multiple times (eliminates the need for an escape function)
- Ability to access returned rows by column number
- Ability to read data from the SQL server on-demand rather than reading the entire result set up front
- HUnit testsuite for each backend driver
- Well-defined standard API and easy backend driver implementation
- Lazy reading of the entire result set (think hGetContents, but for the results of SELECT) (see sFetchAllRows)
- Support for translation between Haskell and SQL types
- Support for querying database server properties
- Add-on package (hdbc-missingh) to integrate with MissingH, providing a database backend for AnyDBM.
- Support for querying metadata such as column names.
- Support for querying additional metadata (column types, etc.)

Scalix Connect for Evolution provides full-function connectivity between Novell Evolution and the Scalix Server.
Scalix Connect for Evolution natively supports IMAP and iCal, resulting in compatibility with the full range of functionality offered by Evolution. No end user retraining is required when Evolution users move to Scalix.
Scalix offers the industrys richest third party support for Novell Evolution, enabling organizations to make centralized enterprise email, calendar and scheduling, address book, and contacts a reality for users on Linux desktops. Whether using Evolution, Outlook or Scalix Web Access, Scalix users enjoy full interoperability with other Scalix clients regardless of the operating platform, email client or web browser.
Scalix Connect for Evolution provides full-function connectivity between Novell Evolution and the Scalix Server. Compatible with Evolution 2.4.x, Scalix Connect natively supports IMAP and iCal resulting in compatibility with the full range of functionality offered by Evolution. No end user retraining is required when Evolution users move to Scalix.
Main features:
- Integrated email, calendar, and directory services
- Rich Text Format (RTF) message formatting
- Offline email folder synchronization (IMAP offline mode)
- Free/Busy directory lookup for group scheduling
- Client- and server-based rules
- Public folders
- Folder management, storage and sorting
- Public distribution lists
- Full Evolution address book & contacts

TrinityOS is a step-by-step, example-driven HOWTO on building a very functional Linux box with strong security in mind.
TrinityOS is well known for its strong packet firewall ruleset, Chrooted and Split DNS (v9 and v8), secured Sendmail (8.x), Linux PPTP, Serial consoles and Reverse TELNET, DHCPd, SSHd, UPSes, system performance tuning, the automated TrinityOS-Security implementation scripts, and much more.
Main features:
- Master References and Recommended Guidelines
- Linux Distribution Thoughts
- Core OS setup
- Network Connectivity
- Security
- System backup
- More Extensive Guides

VPNmonitor is a free Java tool to observe network traffic. Network administrators can use it to monitor VPN (PPTP and IPSec) and SSL (HTTPS) connectivity of wireline/wireless networks.

If you are using Linux this way you will run VPNmonitor:
1. Install libpcap 0.7.2 or above from http://www.tcpdump.org/
2. Copy Jpcap libraries to the jre directories:
cp net.sourceforge.jpcap-0.01.13.jar /jre/lib/ext
cp libjpcap.so /jre/lib/i386
3. su to root
4. Run VPNmonitor
java -jar VPNmonitor.jar

SOPE Application Server is an extensive set of frameworks (16 frameworks, ~1500 classes) which form a complete Web application server environment.
Besides the Apple WebObjects compatible appserver extended with Zope concepts, it contains a large set of reusable classes: XML processing (SAX2, DOM, XML-RPC), MIME/IMAP4 processing, LDAP connectivity, RDBMS connectivity, and iCalendar parsing.
The individual frameworks of the package can be used standalone (for example in Cocoa applications) and do not require the application server itself.
For MacOSX developers, the package includes SOPE:X, which contains special Xcode and Cocoa support for SOPE.
Enhancements:
- This release fixes a set of minor bugs.
- It improves the vCard parser, the IMAP4 client library, the MySQL adaptor, and BSD packaging.

net-check package is a pair of simple perl scripts that will monitor and report on your internet connectivity.

The scripts came about when my DSL provider repeatedly dropped the connections on a machine that was used exclusively as a dial-up gateway.

In addition, since I am spending $50 a month for my internet connection, I want to make sure I get what I paid for.

A Sample:

To: user@isp.net
Subject: Automated Network Checks Report

Last month, there were 64.25 hours of downtime out of 720 possible hours.
(There were only 2692 out of 2880 possible samples made.)
Last months ratio was 0.089 so your bill should be $45.53.

---------------------------------------------------------

1 : 2 hr
2 : 22 hr
3 : 0.5 hr
4 : 1.25 hr
5 : 1.75 hr
6 : 0.25 hr
7 : 0.25 hr
8 : 0.25 hr
9 : 1.25 hr
10 : 3.25 hr
11 : 1.25 hr
13 : 0.25 hr
14 : 1.75 hr
15 : 0.25 hr
16 : 0.75 hr
17 : 0.75 hr
18 : 8.5 hr
19 : 0.75 hr
20 : 11.5 hr
21 : 0.75 hr
22 : 0.75 hr
23 : 1.75 hr
24 : 2 hr
25 : 0.25 hr
27 : 0.25 hr

N-View is a network monitor for small and medium-sized networks. It features automatic scanning of subnets for host addresses, monitoring of ICMP responses from all hosts, signalling of timeouts and delays in the GUI and by mail, a portscanner, an SNMP client (MIB browser and trap receiver), a graphical display of network traffic for network interfaces, connectivity to hosts by telnet, HTTP browser, or an arbitrary external program (such as ssh), printing of network diagrams, automatic generation of HTML pages, and more.
Main features:
Simple configuration:
- automatic scan for hosts, based on ICMP ("ping"),
- configurable limits for response delay, timeout and port scan interval,
- individual configuration can be stored in a configuration file;
Graphic display:
- automatic arranging of icons for hosts and subnets (optional),
- arbitrary background pictures for each screen,
- signalling delay and timeout of hosts and subnets with coloured icons,
- graphic display of traffic load for selected network interfaces,
- arbitrary labelling for all icons and windows;
Signalling of status changes on display, acoustic and per e-mail (optional):
- on timeout or delayed reply of a host,
- on changes of the open port status,
- on receiving of SNMP traps;
Management interface, connections to hosts:
- via external browser,
- via internal telnet client,
- via internal SNMP client/browser;
Flexible display:
- showing Subnets as tabbed or cascaded windows,
- coloured printer output of network diagrams,
- network diagrams can be accessed from HTML browsers from inside the network (external HTML server required);

DECnet is a project to provide DECnet phase IV connectivity for Linux.
What you get is DECnet phase IV end-node and routing capabilities on your Linux box.
As it stands you can "set host" to an OpenVMS system, copy files to and from OpenVMS systems, run remote tasks and test the connections. You can also mount VMS directories as Linux Filesystems. VMS users can start terminal sessions on Linux or access to Linux files or foreign mounted filesystems as NCPFS, NFS, SMBFS via the FAL daemon.
You can use X-Windows from OpenVMS to Linux if you build your X-Server with DECnet support or download one. This makes Linux into an excellent (and cheap!) X-terminal for VMS as well as Unix. It is also possible to display Linux X programs on a VMS workstation using DECnet.
LAT is available as a client and server. This is completely independant of DECnet and does not require a DECnet-enabled kernel. I mention it here partly because I maintain both packages and partly because LAT and DECnet are generally of interest to the same group of people.
Enhancements:
- Fix compile error on Fedora Core 6