Skip to main content
teccart
New Member
Apr 30, 2024 7:53 PM UTC
Solved

What does it means?

Hello everyone.

Can you please explicate me what is it.

In config-firewall-policy-edit:

fixedport - Enable to prevent source NAT from changing a session's source port.

 

If I understand correctly dport means destination port but explication says source port???

Is it right?

Thank you.

Toshi_Esumi
SuperUser
Apr 30, 2024 8:20 PM UTC

I think you just misread the concatenated word "fixedport". It's not "fixe-dport" but it's "fixed-port".
The more explanation is in this KB.

 

https://community.fortinet.com/t5/FortiGate/Technical-Tip-Using-Fixedport-or-Preserve-Source-Port-on/ta-p/195738

 

Toshi

3 replies

AEK
SuperUser
SuperUser
Apr 30, 2024 8:08 PM UTC

Hi

Yes that's right, it means the source port is preserved when doing NAT.

fixedport = fixed port.

AEK
Toshi_Esumi
SuperUser
SuperUser
Apr 30, 2024 8:20 PM UTC

I think you just misread the concatenated word "fixedport". It's not "fixe-dport" but it's "fixed-port".
The more explanation is in this KB.

 

https://community.fortinet.com/t5/FortiGate/Technical-Tip-Using-Fixedport-or-Preserve-Source-Port-on/ta-p/195738

 

Toshi

teccart
teccartAuthor
New Member
Apr 30, 2024 9:06 PM UTC

Ok. It's my mistake. Sorry.

Risk and Resilience in the Age of AI. An OT Thought Leadership Summit for Houston's Critical Infrastructure Leaders. Date: Thursday, December 3, 2026. Time: 8:30 am - 1:30 pm (CT). Location: The Westin Houston, Memorial City | 945 Gessner Road, Houston, TX 77024