"It seems that you're trying to add an external link to a page". Well yes, that's what "Sites using MediaWiki/en" is meant for. I happen to be logged into Wikipedia but that seems irrelevant. Your page asks for an external link, I was obliging but to no effect, your security won't let me.
If anyone would like to drop it there on my behalf, to benefit the page:
- Mirror Swarm - mirrorswarm.com
- Constructing the first Dyson Swarm, one atom at a time.