Scanning the Internet for External Cloud Exposures via SSL Certs
Group G
1. Using an Intranet Within
a company
What is an Intranet
Communication Method during Intranet
What is a firewall ?
Types of Firewall
2. What is an Intranet
When build the computer network in a limited
range, is going to raise low cost and vendor inde-
pendence characteristics by using standard tech-
nology of the Internet.
It can use software and hardware for the Internet.
3. Communication Method
during Intranet
Intranet is business and to be
used, security and the com-
munication cost are impor-
tant. Communication during
intranet is often performed
by an original leased line,
not the internet.
For example there is com-
munication between the cen-
ter which integrates one be-
tween the POS system in a
convenience store. There is
a lot of use by a financial in-
stitution of the bank.
4. What is a firewall ?
The system to prevent invad-
ing a computer network in the
organization from outside.
The computer in which such
system was included.
The cracking act which tries
to invade the inner computer
network from outside was
compared to a fire.
An expression as a “firewall”
is being employed as the one
which stops that.
5. Types of Firewall
Packet filter: Looks at each
packet entering or leaving
the network and accepts or
rejects it based on user-de-
fined rules.
Application gateway: Ap-
plies security mechanisms to
specific applications, such as
FTP and Telnet servers.
Circuit-level gateway: Ap-
plies security mechanisms
when a TCP or UDP connec-
tion is established.
