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22

What exactly do you need? wireshark - network sniffer/analyzer iftop - bandwidth usage darkstat - traffic analyzer nmap - network port scanner nessus - vulnerability scanner metasploit - penetration testing


17

Open Source Look at the project web site Look at the documentation Look at the mailing list archives Look at the SCM (svn, git, hg, etc) In doing so, pick up on the following points... How mature is the software What is the user-base size (lots of people? 3 people?) Who are the people in the user-base (corporate, home user, small business, etc) Is ...


16

Zimbra is an open source alternative to Microsoft Exchange. It uses a number of open source products, namely Postfix, Tomcat and OpenLdap. It can interact with Active Directory and other directory structures. It also offers a pretty extensive AJAX enabled web interface. It offers most of the features offered by Exchange: Email Contacts Shared Calendaring ...


16

Having recently gone through the same song and dance with my own management ("VMWare is really expensive! Check out what OSS options there are out there.") I have some observations to share. I/O performance does vary by hypervisor, though CPU performance is much less variant. In general, 'thin' provisioning is a great way to dock I/O performance. Some ...


15

My recommendation for an IMAP and POP3 server would be Dovecot. It uses the Maildir format, which uses a single file per email, which tends to perform better in most operations than the traditional mbox format. Dovecot uses a number of index files to speed up the performance of the operations that traditionally take a while with Maildir. If Maildir isn't ...


14

We currently used PowerDNS to host many zones using a MySQL server. PowerDNS has been great to us. Some pros/cons: Pros: Uses MySQL backend - other DB backends are available Updates to DB are published instantaneously Very friendly to MySQL Replication. We run two servers with replication and updates published instantaneously to both DBs (and dns ...


13

Ahh...the white whale of open source, the Exchange killer. There's no shortage of competitors: SoGO Open-XChange Zimbra Citadel Bongo Horde @Mail Meldware OpenChange Scalix eGroupWare phpGroupWare And, for those that aren't necessarily looking for free (in either sense), but just don't like Microsoft or Exchange: Gordano PostPath (once Cisco decides ...


12

Sure, OpenOffice For an OS, try Ubuntu or LinuxMint


12

Evolution, by way of evolution-mapi: Package: evolution-mapi Description: Evolution extension for MS Exchange 2007 servers A provider for Evolution that can connect to Exchange 2007 servers and also to Exchange 2003, 2000 and 5.5. It is very beta though, so please report bugs!


12

Best Practical: Request Tracker RT is an enterprise-grade ticketing system which enables a group of people to intelligently and efficiently manage tasks, issues, and requests submitted by a community of users. RT manages key tasks such as the identification, prioritization, assignment, resolution and notification required by enterprise-critical ...


11

Dia is a such program. DiaCze is a windows only version packaged with icon for network diagramming (but you can extract content on a windows computer and copy it to a unix system). Edit: I discovered Kivio today, a Visio like (but still in development)


9

Check out RT: Request Tracker, by Best Practical at http://bestpractical.com/rt/. It's free and open source and works pretty well from what I've heard/read from others. We use a custom-built system internally, so I don't have personal experience with RT.


7

Apart from Open Office that others have metioned there is Google Docs. Actually MS do offer pretty deep discounts for Charities and some not-for-profits, in Ireland and other places. See - here.


7

Lack of activity. If the project has not released new code, show lots of unclosed bugs (or bugs that are very very old with no new bugs), or have user forums that have a very high spam-to-post ratio, that's a sure smell of a decaying codebase. Active projects have regular releases, bug-churn that indicates new ones openned are not outpacing the old ones ...


7

The entire point of HTTPS traffic is that it's encrypted between the server and the end-user so no one else can snoop on it - including your filters. You won't be able to do any content filtering on it. The only HTTPS filtering you'll be able to do is blocking the SSL port to specific IP addresses. If you whitelist, you'll have loads of false positives - ...


6

Alfresco is another big player in the (open source) document management picture, so make sure you also check them out to see what you can rig together. You can get basic document management (folders, revision control) for free, but with the BOM request you might be moving beyond what out-of-the-box open source can give you.


6

Having used Connect Direct, I would say avoid it if you can. My reasons are: Is very hard to set up (it took our infrastructure team a year) There is a massive learning curve to the application, no one here really understands it still We haven't found it any more reliable than psftp and a cron job. On its plus sides: Banks seem to love it When it ...


6

If you have a Windows domain you should read up on using Group Policy to install software. Having said that, though, if the software isn't packaged in Windows Installer (MSI) format this becomes significantly harder. Using Group Policy Startup Scripts to perform silent installations of non-MSI-based packages is certainly possible, but you need some scripting ...


6

I use OTRS (http://otrs.org) for my "support desk" functionality. It is a very powerful application and does a nice job. I will admit that it is a little daunting at first (initial configuration, etc.), but once you get going, you'll be quite impressed. My customers can send an email to the support address and OTRS will, based on my rules, funnel tickets ...


6

I'd take a look at Go Anywhere Services if you absolutely need something professionally supported and secured. Or you can just let a 3rd party host your FTP, and make the security their problem. Mind you, I think it's overkill. As long as it's patched, Windows FTP, Linux FTP, it's all good, and it's not difficult to force SFTP either. You're going to be ...


6

Your question doesn't specify you need a fancy GUI, so I'm going to suggest GraphViz (http://www.graphviz.org/) With graphviz can define your nodes and connection in a text file and use the command line to generate the graph in a number of different output formats. Its no Visio but it often does the job for me.


6

Dia (http://projects.gnome.org/dia/) is the preeminent free opensource diagramming software. It's also pretty ugly. If you're on a mac, I recommend Omnigraffle (http://www.omnigroup.com/applications/OmniGraffle/). It's my favorite diagramming software on any platform. It's neither free nor open source. There are also online tools that actually look ...


6

Solr, from the Apache Lucene project. Excerpt from the web site http://lucene.apache.org/solr/ Solr is an open source enterprise search server based on the Lucene Java search library, with XML/HTTP and JSON APIs, hit highlighting, faceted search, caching, replication, a web administration interface and many more features. It runs in a Java servlet ...


6

There is an Exchange-like open source project called Open-Xchange. It is a messaging and collaboration platform combining common free software packages, open standards and web services. Open-Xchange Server is available as proprietary software and as a community supported open-source software (GPL 2) package.


6

There are plenty, really. Deceptive Licensing - Too many solutions are trying to nickel and dime me to death. The package costs X, but if you want advertised options 1, 2, and 3, that'll be $500-1500 more per option. No thank you. No one uses it - Or at least, Google can't find anyone talking about it. It's either brand new (in which case, you're a ...


5

From jldugger's original link: phpBB falls short primarily on scalability, however until you reach about 5,000 active members, you should be okay. From Gaia Online, a phpBB-based web forum, as of 25/5/09 (today): 28985 users. (24975 visible, 1664 hidden, 2346 guests). 29k > 5k! Now perhaps the original link was talking about scalability out ...


5

Although not stable enough for everyday usage yet, ReactOS is going to be a fantastic option for such organizations when it reaches a more mature codebase.. It is a Windows clone, so anyone familiar with MS Windows will understand it instantly.


5

dd and dd_rescue. See also, this question: Using DD for disk cloning


5

Despite not being familiar with Sitecore, I'm going to go out on a limb and suggest that Drupal is a pretty good match, exactly because it is insanely flexible. When looking to migrate a church website from static HTML to a CMS platform, I downloaded and trialled over 50 different platforms. Took my weekends for several months- yeah, I'm a sucker for ...


5

Have another look at backuppc. Backuppc has a very intuitive web interface, works for both linux and windows hosts, and although it claims to be for PCs, it would work fine for backing up servers too! If you're really intent on doing it on the cheap, you will probably find you have to make some sacrifices.



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