Solwise SAR715PV ADSL Ethernet Router User’s Guide
Chapter
7
. How to…
113
Click
Apply
to keep the changes.
If you are unsure about any settings or values then you are advised
to leave the values set to default.
When you have finished altering the settings then remember to
save the new configuration and restart.
7.8.2 Packet
Filtering
Packet filtering allows you to block certain types of traffic, such as
telnet access or FTP applications, the 715PV allows you to
completely customise what you want to filter. There are pre set
security levels of
none, low, medium & high
. The tables below
The following tables describe the default policies enabled in the
firewall for each of the high, medium and low security levels. The
tables tell you whether a certain service can be received
in
or
allowed
out
by a specific policy:
HIGH SECURITY LEVEL
External < > Internal
External < > DMZ
DMZ < > Internal
Service Port
In
Out
In
Out
In
Out
http 80
x
3
3
3 3 3
dns 53
x
3
x
3
x
3
ftp 21
x x x
3
x
3
telnet 23
x
x
x
x x x
smtp 25
x
3
3
3 3 3
pop3 110
x
3
3
3 3 3
nntp 119
x
x
x
x x x
real audio/video
7070
x
x
x
x x x
icmp N/A
x
3
x
3
x
3
H.323 1720
x
x
x
x x x
T.120 1503
x
x
x
x x x
SSH 22
x
x
x
x x x
MEDIUM SECURITY LEVEL
External < > Internal
External < > DMZ
DMZ < > Internal
Service Port
In
Out
In
Out
In
Out
http 80
x
3
3
3 3 3
dns 53
x
3
3
3 3 3
ftp 21
x
3
3
3 3 3
telnet 23
x
3
x
3
x
3
smtp 25
x
3
3
3 3 3
pop3 110
x
3
3
3 3 3
nntp 119
x
3
3
3 3 3
