The document discusses the principles and freedoms associated with free/open source software (FOSS), highlighting the rights of users to run, study, modify, and redistribute the software. It emphasizes the importance of licensing that allows for source code access and the ability to improve and share modifications while maintaining the integrity of the original author's work. Additionally, the document mentions various tools and security considerations related to open-source software.

1. Prabath Siriwardena
Software Architect & Senior manager, WSO2

2. Free/Open
Source
Software,
or
FOSS,
is
software
that
is
liberally
licensed
to
grant
users
the
right
to
study,
change
and
improve
its
design
since
its
source
code
is
made
available

3.
¡ The
freedom
to
run
the
program
for
any
purpose
¡ The
freedom
to
study
and
modify
the
program
¡ The
freedom
to
copy
the
program
so
you
can
help
your
neighbor
¡
The
freedom
to
improve
the
program
and
release
your
improvements
to
the
public,
so
that
the
whole
community
benefit

4.
¡
The
license
should
not
prohibit
free
redistribution
¡
The
program
must
include
source
code
and
must
allow
distribution
in
source
code
as
well
as
compiled
form
¡
The
license
must
allow
modifications
and
derived
works,
and
must
allow
them
to
be
distributed
under
the
same
terms
as
the
license
of
the
original
software
¡ The
integrity
of
the
author’s
source
code
and
reputation
must
be
maintained
by
requiring
derived
works
to
carry
a
different
name
or
version
number
from
the
original
software
¡ The
license
must
not
discriminate
against
any
person
or
group
of
persons

5.
¡ The
license
must
not
restrict
anyone
from
making
use
of
the
program
in
a
specific
field
of
endeavor
¡ The
rights
attached
to
the
program
must
apply
to
all
to
whom
the
program
is
redistributed,
without
the
need
for
execution
of
an
additional
license
by
those
parties
¡ The
rights
attached
to
the
program
must
not
depend
on
the
program
being
part
of
a
particular
software
distribution
¡ The
license
must
not
place
restrictions
on
other
software
that
is
distributed
along
with
the
licensed
software
¡ No
provision
of
the
license
may
be
predicated
on
any
individual
technology
or
style
of
interface

6. http://news.netcraft.com/archives/2011/01/12/january-­‐2011-­‐web-­‐server-­‐survey-­‐4.html

7. http://www.securityspace.com/s_survey/data/man.201007/mxsurvey.html

8. http://en.wikipedia.org/wiki/Usage_share_of_web_browsers

14.
Lot’s
of
eye
balls

15.
Lot’s
of
[Expert]
eye
balls

16.
Lot’s
of
[Expert]
eye
balls
XML
signature
HMAC
truncation
authentication
bypass
DTD
based
XML
attacks
XML
Signature
Wrapping
Attack
The
Java
security
bug
Double.parseDouble("2.2250738585072012e-­‐308");

17.
Money
can’t
buy
the
best
evaluation

18.
Money
c
an’t
buy
the
best
evaluation
AES
IPSec
PPTP

19.
¡ Absence
of
meticulous
evaluation
¡ Spurious
open
source
¡ Lack
of
sponsorship
¡ Lack
of
proper
documentation

20.
¡ Nessus
¡ Snort
¡ Nagios
¡ SpamAssasssin
¡ ClamAV
¡ OpenSSL
¡ OpenSSH
¡ Ossec
HIDS
¡ Wireshark