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TZ400/Comcast Router - effect on Anti-Virus, Anti-Spyware and intrusion prevention

DaveInPADaveInPA Newbie ✭
in Entry Level Firewalls

I have a TZ400 on a LAN port of a Comcast modem/router.

WAN IP on the firewall is set to DHCP to get IP from router (10.1.10.x).

LAN on the firewall is a different network (192.168.1.x)

No VPN, VOIP or other complications. It works fine.

My question is: Does the fact that the firewall is looking at NAT traffic reduce the functionality of the firewall features (Anti-Virus, Anti-Spyware and intrusion prevention)?


Thanks,

Dave

Category: Entry Level Firewalls
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Best Answer

  • CORRECT ANSWER
    MasterRoshiMasterRoshi Moderator
    Answer ✓

    Upstream NAT should not effect your security posture unless you have a very niche circumstance.

Answers

  • TKWITSTKWITS Community Legend ✭✭✭✭✭

    "Does the fact that the firewall is looking at NAT traffic reduce the functionality of the firewall features (Anti-Virus, Anti-Spyware and intrusion prevention)?"

    Antivirus, antispyware, etc. are functions of the 'UTM' features of the platform, not the 'firewall' features. Either way, since you are double NATd and double firewalled I suppose that, yes the UTM functionality of the Sonicwall is being 'reduced'.

  • DaveInPADaveInPA Newbie ✭

    Thank you for the reply TKWITS - I'll rephrase.

    Does the fact that the traffic passing through the TZ400 is NAT'd make it more likely that harmful/malicious traffic will not be blocked, etc. by the TZ400?

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