efficient way to check parked domains? - dns

I am writing a script that checks if given domain is parked or not. so far, I have this solution:
add couple of characters at the end of the url.
if url redirects to another page and
returns 302 http status code then it is parked domain.
returns other than 302 then it is normal domain.
but some normal domains also return 302.
so any suggestions are greatly appreciated.

It's not as simple as that. A 302 response just means content is temporarily at a different location. This can happen on a normal website and it doesn't always happen on a parked site.
I worked at an ISP with over 20,000 parked domains and we didn't use 302's on any of them.
I don't think you'll find a 100% solution for this. Even if you checked the page for phrases such as "Buy This Domain" and "This Domain May Be For Sale" you won't know for sure.

Related

Partial 301 redirects & SEO strategy

This is somewhat of a subjective question. But would like the communities take on this. My client is doing a site split. www.domain1.com will turn in to -- www.domain1.com + www.domain2.com. I know this isn't typically advisable from an SEO perspective, but they are doing it for legal reasons.
Our plan is to only rip out the product pages on www.domain1.com and add those on www.domain2.com everything else on domain1 will stay and everything else on domain2 will be original content. So here's the question, still a good idea to do single page 301 redirects for the pages that are transferred?
www.domain1.com/apples > www.domain2.com/apples
I know that's a bit open-ended, without a ton of detail, but if you have specific examples of where you've done something similar, I'd be curious to know what worked/didn't.
Yes, with a clarification: http 301 is the best for your purpose, because it means permanent redirect (good for SEO, you pass the page and domain authority, link juice...); instead a 302-redirect (http 302) means a temporary redirect, you have no time limits but all the SEO value won't pass! For your purpose, you don't want that.
In general, all pages should be redirected with http 301. Aniyway, with data analysis you can make a decision: if you have a page unuseful, with no traffic, it doesn't need to be redirected, you can use http 404 or http 410 (you can build also a custom 404 page!).
The last thing, must avoid multiple redirects, for example: instead of site1-->site2-->site3 you just need to do: site1-->site3. The reason is each redirect hurts loading speed (also the most common and useful redirect, from http to thhps!!). You just need to avoid multiple ones.

Building new website on old domain name. How should I redirect the old site?

I recently moved a website to another domain, but I am keeping the original domain for a future website. The recently moved website is permanently moved, but I only want traffic to be redirected temporarily to the other domain.
I have read countless 301 vs 302 posts, articles, etc. and have failed to find any that address this particular situation. And no one answered this similar question:
Moving to a new domain and using the old one for a new website - how to handle 301 redirects?
But the difference with my question is: I don't even know that I should be using a 301 redirect for this. What's the best way to handle this situation in general?
301 Moved Permanently doesn't mean that the domain name should never be used again; it means that the content the user requested has moved permanently, which is exactly the situation you describe.
(308 Permanent Redirect is supposed to supplement 301, but it is sometimes treated oddly and doesn't work at all on Windows 7 or 8.1 under IE.)
When you decide to re-use the old domain for a new set of resources, you can simply stop redirecting away from it. By then you hope that people looking for the old resource have updated their bookmarks/links thanks to the 301. It might be polite to allow some duration of time for this transition to occur.
Neither 302 Found nor its replacement 307 Temporary Redirect is appropriate here, as both misrepresent the situation and do not signify that people should permanently look for the old content in the new location: they're going to be mighty confused when the original domain no longer redirects, allegedly the end of a temporary situation, but then also does not serve the expected content.
You can use the .htaccess file to redirect with 307 status code (the successor of 302 in HTTP/1.1)
Redirect 307 / http://other-domain/
Here's a link that you may find helpful. You can also redirect with 308 status code also as #István Rábel suggested

Catch redirect from another domain

I have a question about redirection 301 or 302.
For ex. i have domain www.example.com.
It's a good site with a good domain history. Some 'BAD' webmasters make sometimes a redirect from bad-histories domain with search bans to redirect it to good domains to downgrade good sites in search system query as Google.
So question is: is it possible to know, have someone made this bad-redirect?
As i understand in each html response html headers are transmitted. May by there is a way to catch this responses to detect such redirects?
Is it well-known practice?
Or it is impossible and it's like paranoia?
I think is paranoia, but major browsers still keep the referrer in the redirection and can be read at destination. In php is:
$referral = $_SERVER['HTTP_REFERER'];
you can trap all referrer urls in a log file and I have no idea how to filter out good sites. this way you will discover only redirects only from websites heaving some traffic;

Pointing multiple domain names at same place

I have a website ranking well in Google, my current website has dashes in and looks like so...
this-is-mine.com
Ive just also bought
thisismine.com
I'd like to point the latter to my first site, but I dont want it to be classed as duplicate content.
I'm unsure if I just do this through 123-reg but will this affect my Google rankings, or is there a correct way of doing this without penalising myself?
According to the link below, my thoughts are confirmed.
A 301 is fine as it forwards everything including page rank to the "new" site. In your case this-is-mine.com.
A 302 could/would be a problem for SEO.
http://seo-hacker.com/301-302-redirect-affect-seo/
If your current website is ranking well then don't disturb it. There is no benefits in pointing multiple domains on one website. You can also make a single page website on the new domain and optimize it for Google and link with your old one.
If you still want to do this then do a 301 redirect but make sure that the domain is new and has no spammy back links pointing to it.

bots and 301 redirect

I have changed the structure of the URLs of my site more than 6 months ago. I detect the use of legacy URLs and redirect to the new URL with a 301 status code. I verified with flidder that the status code is correctly returned upon the request. But bots (yahoo slurps, googlebot, etc.) are still hitting the old URLs. Is there something I am missing?
No, just it takes a very, very long time for crawlers to get the message. I have bots crawling addresses that have not existed since 2005 - when folk harp on with addresses being permanent, they really are.
Additionally, depending on how your URL's are structured, you can disallow the old addresses with robots.txt
Try this and this will only redirect to the bots.
if (preg_match("#(google|slurp#inktomi|yahoo! slurp|msnbot)#si", $_SERVER['HTTP_USER_AGENT'])) {
header("HTTP/1.1 301 Moved Permanently");
header("Location: http://www.your-main-site.com/");
exit;
}
If external sites have linked to your old pages and those links are still accessible for bots, the bots will keep coming and try to access the content.
mentioned you site address here:
http://www.your-main-site.com/
Thats we use to transfer the domain and sometime for blackhat seo.

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