Introduction; Your Sonicwall Internet Security Appliance - Dell SonicWALL GX250 Manual

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Introduction

Your SonicWALL Internet Security Appliance

The SonicWALL is a complete security solution that protects your network from attacks,
intrusions, and malicious tampering. In addition, the SonicWALL filters objectionable
Web content and logs security threats. SonicWALL VPN provides secure, encrypted
communications to business partners and branch offices. SonicWALL VPN is included
with the SonicWALL GX250 and GX650.
The SonicWALL uses stateful packet inspection to ensure secure firewall filtering.
Stateful packet inspection is widely considered to be the most effective method of
filtering IP traffic. MD5 authentication is used to encrypt communications between your
Management Station and the SonicWALL Web Management Interface. MD5
Authentication prevents unauthorized users from detecting and stealing the SonicWALL
password as it is sent over your network.
The following figure illustrates the SonicWALL's security functions.
By default, the SonicWALL allows outbound access from the LAN to the Internet and
block inbound access from the Internet to the LAN. Users on the Internet are restricted
from accessing resources on the LAN unless they are authorized remote users or
Network Access Rules were created to allow inbound access.
If the SonicWALL includes a DMZ port, users on the LAN and on the Internet have full
access to the devices on the DMZ.
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