Actiontec electronic GT704WR Firewall Security, Level Services Table, High Security Level

Firewall Security	F
Level Services Table

The following information is related to the Firewall options (High, Medium, and Low) section in the “Advanced Setup” chapter of this manual (see page 44). The types of services and their respective ports are listed in the two right-hand col- umns: the “In” column details whether a particular service can be accessed by a user outside of the network; and the “Out” column details whether a computer on the Router’s network can access a particular incoming service.

For example, in the “High Security Level” section below, the http service uses port 80. Since no is listed in the In column, a user outside the Router’s network cannot access a computer on the network via the http service; in this case, no computers on the network can be used as a Web server (i.e., to host a Web site accessible to outside users). However, since yes is listed in the Out column, all computers on the Router’s network can access the Internet via the http port.

If Basic Security is selected in the “Firewall” screen, firewall filtering is based on the basic NAT firewall.

High Security Level

Service	Port	In	Out
http	80	no	yes
dns	53	no	yes
ftp	21	no	no
telnet	23	no	no
smtp	25	yes	yes
pop3	110	yes	yes
nntp	119	no	no
real audio/video	7070	no	no
icmp	n/a	no	yes
H.323	1720	no	no
T.120	1503	no	no
SSH	22	no	no
imap	163	yes	yes
https	443	yes	yes
secure imap	983	yes	yes
secur pop3	885	yes	yes

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