we expand networks to include new services, we must continually strive
secure them. It is not an inherently easy thing to do.
First, we need to balance growth and total security without duplicating
operations. Second, our networks need to support the mobility of our workforces
as the number of remote sites that are connected continues to multiply.
finally, while one cannot predict what will be needed for tomorrow, we
build in the flexibility to adapt to whatever unknown priorities may
the near future....
This chapter explains the operations of the different types of firewall technologies and the role they play in network access control and security architectures. It also describes guidelines for firewall rule set creation. The chapter then describes the function and building blocks of Network Address Translation.
The attackers are always looking to compromise the network. Custom settings will help prevent easy access for hackers IDS, firewall and Honeypost is the important technology. All analytical tools and related financial/economic concepts are discussed within this systems context, which reflects the three basic types of decisions made continuously.
The logs contained in this document are divided in four categories. The categories are
router, firewall, Intrusion Detection Systems (IDS) and miscellaneous. These logs are
meet to be used as reference to identify the type of software that generated a log model
and if necessary, how they can be interpreted.
The Grid is a highly dynamic environment. The standards governing grid services are currently
being defined and software implementations are subject to revision. The resources available are
continually being expanded and changing in configuration. The user community is geographically
widely distributed and volatile. Managing security in this environment, whilst retaining the desired
level of accessibility for users is a challenge for software designers, implementers and site
Kerio Connect is the successor of the successfull application Kerio MailServer. Kerio Connect
is a modern multiplatform mailserver which supports variety of communication protocols.
These protocols allow using of any email clients including those which are supported by
mobile devices. The mailserver also allows direct access to mailboxes via a proprietary web
Kerio Connect uses mailboxes to store various data types. Besides email messages, calendars,
notes, contacts and tasks are kept in mailboxes. Calendars and tasks offer also task and
Welcome, let’s take a minute and revisit what we have learned so far. We started out with an
example attack and then focused on one tool that would have given a lot of bang for the buck, a
firewall. If you reflect back carefully on the firewalls and ways to avoid firewalls then you realize
we introduced the concepts of threats and countermeasures. We covered the history of the threat as
far back as 1995 to the most recent type of attacks.
Use caution when testing. Certain types of testing, including network scanning, vulnerability testing,
and penetration testing, can mimic the signs of attack. It is imperative that testing be done in a
coordinated manner, with the knowledge and consent of appropriate officials.
Ensure that security policy accurately reflects the organization’s needs. The policy must be used as a
baseline for comparison with testing results. Without appropriate policy, the usefulness of testing is
There are several different types of security testing. The following section describes each testing
technique, and provides additional information on the strengths and weakness of each. This information
is also summarized in Table 3.1 and Table 3.2. Some testing techniques are predominantly manual,
requiring an individual to initiate and conduct the test. Other tests are highly automated and require less
Most businesses have broadband (high speed) access to the Internet. It is important to keep in mind that
this type of Internet access is always “on.” Therefore, your computer - or any network your computer is
attached to - is exposed to threats from the Internet on a 24 hour a day/7 day a week basis.
For broadband Internet access, it is critical to install and keep operational a hardware firewall between
your internal network and the Internet. This may be a function of a wireless access point/router or may
After you read this chapter you should be able to: Describe various types of network attacks, and identify ways to safeguard against these attacks, including firewalls and intrusion detection software; discuss techniques to prevent unauthorized computer access and use; identify safeguards against hardware theft and vandalism;...
SQL*Net is a protocol Oracle uses to communicate between client and server
processes. (SQL stands for Structured Query Language.) The protocol consists of
different packet types that PIX Firewall handles to make the data stream appear
consistent to the Oracle applications on either side of the firewall. SQL*Net is
enabled with the fixup protocol sqlnet command, which is provided in the default