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Recently my client has configured HTTPS. I recommended that he implement 301 redirection to 200. His developer could not do that and it is still using 302 redirects.

How bad it can affect a website if it uses 302 redirects?

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    A 302 will not do what is required. If you can serve a 302, then you can serve a 301. – closetnoc Sep 11 '17 at 16:18
  • @closetnoc I know but the problem where is occurring is not at web server, it is at load balancer. As they installed https on load balancer and www on web server. I hope you are getting what I am saying. I have suggested them to install either at load balancer or at web server but client is not listening or don't want to listen so I am asking would it harm my website as search perspective. – Rajat Sep 11 '17 at 16:26
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    I assume you are trying to redirect http to https. If that is the case, then http must be handled for a proper redirect to occur. If you do not want http to be indexed and https to be, then you must use a 301 and not a 302. I have used load balancers before. These are often transparent proxy servers that look at session state and forwards the request packet modified to the the web server that is handling the session. Generally speaking, you can handle the certificate there too. Can it be a configuration issue with the load balancer? It should be smart enough to handle both protocols okay. – closetnoc Sep 11 '17 at 16:53
  • @closetnoc seems like you are talking sensible but I myself at my end I wouldn't be able to identify where they have the issue. – Rajat Sep 11 '17 at 16:57
  • What load balancer are you using that supports only 302 redirection and not 301 redirection? – Stephen Ostermiller Sep 22 '17 at 16:01
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Whilst I'd definitely always 301 http to https (as why would it ever be temporary?), Google have said that 301, 302, 30x do not dilute your pagerank in SEO.

The team at MOZ have recently studied this, and IIRC they're not so convinced.

If it was my site, I'd definitely tell/bribe whoever did your 302s, and get them to do 301s.

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It is not good to have those redirects as a 302. Google's indexing will keep those old HTTP URLs, as the 302 redirect is a "Temp" redirect. The HTTPS pages will still index, but may compete with the HTTP pages, that or the HTTPS may struggle to index. Would be also concerned if there is a canonical link elements on the pages and if so, what version they point to... ie HTTP or HTTPS.

If the developer can't set the redirects to a 301, then you need a new developer. It should be a simple adjustment.

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