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Linked NAT rule for LAN to LAN traffic?

Hello all,

I have inherited a firewall that has linked NAT rules for LAN to LAN type rules. Is there any need for them (I don't think so as really only required for LAN to WAN), and would it hurt anything if I just left the NAT rules?

Thanks.

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rfcat_vk 3 months ago +1 verified

Depends if the same IP address range is in use on both segments otherwise no. Ian

+1 rfcat_vk 3 months ago

Depends if the same IP address range is in use on both segments otherwise no.

Ian

XG115W - v20.0.2 MR-2 - Home

XG on VM 8 - v21 GA

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0 Raphael Alganes 3 months ago

Hello Mark,

As an additional to Ian's comment above, before making any changes/deletion on the NAT rule you might want to review the usage counter and review if there are still connections using the NAT rule

You can reset this to 0 and from there monitor for a certain duration and then make a decision to delete or not.

Hope this helps.

Regards,

Raphael Alganes
Community Support Engineer | Sophos Technical Support
Sophos Support Videos | Product Documentation | @SophosSupport | Sign up for SMS Alerts
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0 rfcat_vk 3 months ago in reply to Raphael Alganes

Hi Raphael,

the traffic between LANs will always go through the linked NAT, so counting the traffic only proves the firewall rule is still in use.

Ian

XG115W - v20.0.2 MR-2 - Home

XG on VM 8 - v21 GA

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