Seems almost arbitrary there BartoszP….
Why not add something here, so that its clear to new folks, and one can point to a reference that talks about attachments…
Something like:
If you are new here - welcome! For your first question, please provide a clear description of your setup, and upload a network diagram if possible. Ensure to include which software version you are using and provide the full config: /export file=anynameyouwish (minus router serial number, any public WANIP information, keys, dhcp lease lists). Zipped files or links to third party sites, to view configs etc are not welcome. Do respect the forum regulars, this is not an official support platform, but a forum that is run by volunteers on their own free time.