HTML and Robots.txt

Hello,

I have a question regarding HTML redirect and robots.txt. If I have an HTML redirect in a index.html file in the admin folder of my site, if I tell robots.txt not to crawl that folder would it still have an effect on SEO, blacklisting, etc? My gut instinct tells me no but I thought I should confirm.

If I were to rename the file to index.php and had a php redirect instead, would it still hurt SEO or would that be handled differently?

Thanks in advance!

First of all: what do you mean with "html redirect"?

Secondly: why are you concerned with SEO if this is about your admin folder? Surely, bots have no reason to be there anyway?

HTML redirect such as a meta tag that redirects the site. (I'd post an example or even link to a site that has a guide but the forum isn't letting me)

I've heard such redirects can get your site in trouble with search engines since the script is mostly used by spammers now.

How would bots be able to differentiate between regular folders and what the admin folders without being told? What if one enters the admin folder, finds the redirect and flags the site?

Why would anyone find the admin folder, and why would anyone care? Is your site a spam site?

Maybe I still don't get the full picture.

If you don't want bots or people to find hidden pages, then don't link to them and don't redirect to these pages ever.

Not a spam site. The HTML redirect is only in effect when someone who has permission attempts to access the Admin folder. Since the data required to use the panel to it's fullest is in another file in the same folder a redirect is necessary (index.html will redirect you to say settings.php). If a bot were to find the admin folder say through a link on the front end prompting a user to access the admin folder and the bot is caught in the redirect, would the site flagged?

Sorry if I'm not being clear enough.