Firewall protection settings - Advanced programs options (Addresses and Ports)

 

Advanced options for defining network access for programs installed on your computer consist of specifying the IP Addresses (number or numeric code that uniquely identifies every computer that exists) and communication Ports (access points in a computer or means through which information is transferred -inbound/outbound- from the computer to the outside and vice-versa) that those programs can use.

 

You can only access these advanced options if the corresponding to one of the selected programs has the Allow action associated to it. Two tabs are displayed when you access these advanced configuration options.

 

Addresses

In this tab you must indicate the IP addresses (the addresses of other computers - workstations and servers in the network number or numeric code that uniquely identifies every computer in the network) that these programs can use. The following options are available:

 

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·      All. If you check this option, programs to which you granted network access permission will be able to communicate with any other computer (with every IP address they find and which identify other computers).

·      The following addresses. Type the IP address corresponding to the computers (network workstations and servers) with which programs can communicate (computers that can be accessed). You can enter individual addresses or address intervals.

 

When you enter several individual IP addresses, separate them with a semicolon (,). If you want to specify an address range, separate them with a hyphen (-).

 

For example: 192.168.1.1,192.168.1.45,172.1.1-172.1.1.250

 

Ports

The communications ports are the access points in a computer or means through which information is transferred –inbound/outbound – from the computer to the outside and vice-versa. In this tab, you must indicate if the program can connect to the network and if the program can be used from the network (if other users or programs will connect to it from the network). In both cases, you must define functioning characteristics. You have the following options:

 

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Connect to other computers (client). This allows you to indicate if the program will be able to connect to the network.

 

·      Allow (act as client). If you check this option, every field in this section will be enabled. You can then indicate the communication ports (access points in a computer or means through which information is transferred –inbound/outbound – from the computer to the outside and vice-versa) the program can connect to:

 

TCP ports: you can select the following TCP (Transmission Control Protocol) type communications ports- a protocol that organizes the groups into which data is broken up into when it is transferred between computers, in order to avoid errors) to which the program can connect: All, ftp data, ftp, telnet, smtp, tftp, gopher, finger, (WWW) http, kerberos, rtelnet, pop2, pop3, sftp, nntp, irc and https.

 

UDP ports: you can select the following UDP (User Datagram Protocol) type communication ports (type of communication protocol that allows information to be transferred between computers, without controlling the dataflow), to which the program can connect.

 

Connect from other computers (Server). This allows you to specify if the program can be used from other computers connected to the network.

 

·      Allow (act as server). If you check this option, every field in this section will be enabled. You can then indicate the communication ports (access points in a computer or means through which information is transferred -inbound/outbound- from the computer to the outside and vice-versa) through which connections to the program can be established from other points in the network:

 

TCP ports: you can select the following TCP (Transmission Control Protocol) type communications ports- a protocol that organizes the groups into which data is broken up into when it is transferred between computers, in order to avoid errors) through which other computers can connect to the program: All, ftp data, ftp, telnet, smtp, tftp, gopher, finger, (WWW) http, kerberos, rtelnet, pop2, pop3, sftp, nntp, irc and https.

 

UDP ports: you can select the following UDP (User Datagram Protocol) type communication ports )type of communication protocol that allows information to be transferred between computers, without controlling the dataflow), through which other computers can connect to the program.

 

image\nota_shg.gif Note: In both cases (when the program acts as a client and when the program acts as a server), you can enter port ranges, separated by hyphens, (-) or single ports, separated by semicolons (,). You can also indicate the numbers corresponding to each port, without having to write the protocol name (sets of code and formats -a language- used by computers to communicate).