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Vlans Cannot connect to Internet

MidnightMidnight Newbie ✭
edited July 2023 in Mid Range Firewalls


I am in the beginner stage of networking and I am having an issue with 2 vlans I just created at home. This is a test lab with some old equipment i had lying around from old jobs.

I have Sonicwall TZ 205 firewall and a HP Procurve 2510G Layer 2 switch.

So far, I have created 2 subinterfaces for the vlans:

X0:v10 and X0:v20

v10: (native)


I have port 1 tagged and included in vlan10 and 20

Port 1 is connected directly to the sonicwall on X0 interface.

I have configured the switch to match the interfaces on the firewall.

I had to configure the ip helper for both and I am receiving dhcp addresses on the devices I have in both vlans.

The problem is neither vlan 10 or 20 can connect to the internet.

On the firewall, I created 2 zones for both vlans and the zones are trusted.

I checked the access rules and it looks like the allow rules i need were created by default.

Please see attached.

Does anyone know what I might be missing here?


Category: Mid Range Firewalls


  • Options
    ArkwrightArkwright All-Knowing Sage ✭✭✭✭

    Let's start with the basics: do you see anything in the ARP cache on those VLANs?

    Is anything logged about the source IPs when they're trying to reach the internet?

  • Options
    AjishlalAjishlal Community Legend ✭✭✭✭✭
    edited August 2023

    @Midnight ,

    Check your NAT policy as well as the ACL.

    As well as check your switch configuration. the switport is tag with VLAN.

    Your clients are receiving the v10/v20 subnet IP from DHCP pool.?

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