3. NETWORK POLICY
In order to implement network
policy , an organization can issue
rules such as , only one
computer from the entire
network is allowed to establish
an ftp connection i.e. to
download some content we
have to visit that one particular
computer.
4. ADVANCED AUTHENTICATION
While running an
application you might be
required to enter a user
id and password. This
help to ensure that
malicious programs does
not harm your devices, if
you are confident about
that application you can
ask for the combination
of id and password by
the network admin.
5. PACKET FILTERING
Packets received by the
firewall are analyzed against a
database of trusted
resources, if verified than they
are allowed through
otherwise annoying message
appears on the screen.
Some firewall also logs such
request with your IP and you
may be later questioned
about your intentions while
making such request
6. APPLICATION GATEWAYS
Popularly known by the name of
application proxy or application
level proxy the proxy establishes
the connection with the
destination behind the firewall and
acts on behalf of the client, hiding
and protecting individual
computers on the network behind
the firewall.
7. FIREWALL CAN SAVE US FROM
Remote login
Application backdoors
SMTP session hijacking
Operating system bugs
Denial of service
E-Mail bombs
Spam
Source routing
8. WHAT IT CAN’T DO
Can’t protect you against malicious insiders
Can’t protect you against connections that don’t go
through it like TOR.
Can’t protect against completely new threats.
9. CONCLUSION
In order to protect ourselves from all the threats, we
actually have to block everything, but that rules out
logic of having an internet connection.
Hence the proper way is to block everything and then
allow what we need resulting in the need for a good
network administrator who completely understands the
need of an organization.
