Lantronix SCS1620 Guia do Utilizador descarregar pdf (Página 62)

SCSxx05/SCSxx20 User Guide 4: Configuration

4-4

Configuring Firewall (Packet Filtering)

The SCS incorporates a packet filtering option (a "firewall"). (The Web

configuration interface uses the term “Packet Filtering.”)

Note: You must not use packet filtering (firewall) if you are using NFS or

NIS, because it would filter out the NFS or NIS packets.

You may configure the firewall for your site by setting the following parameters.

 Enable/disable Firewall (default is disabled)

 Reject method (default is Reject; returns a connection denied on blocked

ports.)

 Ping response (default is disabled, which makes the SCS visible to

pings)

 TCP public services (default is ssh, telnet, and https allowed)

 UDP public services (default is ntp allowed)

1. With Configure the Firewall selected, press Enter. The firewall prompt

displays.

2. Select Yes to enable or No (default) to disable packet filtering, and press

Enter. If you selected Yes, the reject method prompt displays.

If you selected No, the setup menu returns with Configure Device Ports

selected.

3. To choose the reject method for attempts to access your site, select Deny or

Reject (default). (The screen explains these responses.)

What is the value for REJECT_METHOD?

Use DENY to ignore connection attempt on blocked ports.

Use REJECT to return connection denied on blocked ports.

DENY / REJECT

4. Press Enter. The ping response prompt displays.

5. Select Yes to enable the SCS to be invisible to ping or traceroute inquiries,

or No (default) to disable this feature.

Enable INVISIBLE_TO_PING?

Do you want the SCS4805 to be invisible to ping and

traceroute?

You will still be able to ping and traceroute outbound from

the SCS4805. Yes is recommended for maximum security.

Yes / No

6. Press Enter. The TCP public services prompt displays.

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Lantronix SCS1620 Guia do Utilizador Página 62