How to move SSL certificate to a new hosting?

My sites are using SSL service of Lets encrypt on my hosting but I will move my hosting to a new host next week. The SSL certificate is assigned on an IP address on my hosting, when moving to a new hosting, how can I keep current SSL and do I need to change IP (used on my old hosting) to use for SSL on new hosting?

Many SSL Certificate Authorities give unlimited server licenses that mean you can install your certificate on number of servers. Now in the case of LE, I actually don't know they are giving unlimited server licenses or not. If they do, they you don't require to request new certificate or reissue it as you can use existing certificate on your new server. Now if they don't, you have to make fresh request for new SSL Certificate.

Klaus Warzecha said:

My sites are using SSL service of Lets encrypt on my hosting but I will move my hosting to a new host next week. The SSL certificate is assigned on an IP address on my hosting, when moving to a new hosting, how can I keep current SSL and do I need to change IP (used on my old hosting) to use for SSL on new hosting?

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Lets encrypt ssl its free, your new hosting provider can issue you a new one so there is very easy to do it.

Klaus Warzecha said:

My sites are using SSL service of Lets encrypt on my hosting but I will move my hosting to a new host next week. The SSL certificate is assigned on an IP address on my hosting, when moving to a new hosting, how can I keep current SSL and do I need to change IP (used on my old hosting) to use for SSL on new hosting?

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You can export the certificate, you will find it in the SSL Certificates section, and import it to your new hosting.
Or you can simply re-issue a new certificate just after the migration.

AlbaHost said:

Lets encrypt ssl its free, your new hosting provider can issue you a new one so there is very easy to do it.

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I don't want to have a new ssl. I want to keep current ssl for new hosting. Is that possible?

VirtuBox said:

You can export the certificate, you will find it in the SSL Certificates section, and import it to your new hosting.

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That's true, I see this option in my hosting panel
Paste a pre-generated certificate and key

VirtuBox said:

Or you can simply re-issue a new certificate just after the migration.

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If i get a new one, my https (ssl) on my blogs can be interrupted?

Klaus Warzecha said:

My sites are using SSL service of Lets encrypt on my hosting but I will move my hosting to a new host next week. The SSL certificate is assigned on an IP address on my hosting, when moving to a new hosting, how can I keep current SSL and do I need to change IP (used on my old hosting) to use for SSL on new hosting?

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Simply answer - your new hosting provider has to Lets encrypt enabled on the server you are on.

VirtuBox said:

Let's Encrypt certificates are only valid for 90 days, so that's why it's not a problem to generate a new certificate instead of keeping the previous one.
But you may have to import your previous certificate if you don't want to have any security errors during the migration, because web browsers will display a warning if you haven't generate a new certificate.

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I am also using Let's Encrypt SSL on my site but I don't know when it will be expired.
I want to check this and renew it before it is expire.
Is there a tool or way to check?

isix said:

Simply answer - your new hosting provider has to Lets encrypt enabled on the server you are on.

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It is necessary condition to enable SSL but you need to save old cer key when moving to a new host.

isix said:

You can check it e.g. here sslshopper.com/ssl-checker.html

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VirtuBox said:

You can do it directly from your web browser by using right-click > inspect > security. You will be able to display the certificate and to see the expiration date.

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Thanks you guys for sharing, both worked.
When can we renew SSL?
When SSL on a website is near expire, they will notice about this?

The best solution for you, is to move to a new host with letsencrypt enabled on their web hosting. However you should make note that a small interruption of around 1-4 hours is still possible. Because lets encrypt ssl are alloted or generated based on IP, so when you change the dns to new server and point the A records to their hosting, then it takes around 30 minutes to 24 hours to get the dns propagation to complete. And you can generate letsencrypt certificate on new server once the dns is resolving at the server end. so a small interruption is possible.

However I am not sure, if exporting ssl from old host to new host will work or not in case of letsencrypt ssl certificates. Even it it gets exported and imported correctly, you may get issues during renewal. So I strongly recommend you to generate new LE SSL on your new host fresh. It makes sure that everything works perfectly.

Another solution:

If you want, you can use cloudflare Origin pull SSL certificate, which is offered for 10 years term, so you can install it on existing host and new host at the same time and this will not affect ssl interupption during migration. So this is last solution I have for you, if you are interested in cloudflare ssl. You can get letsencrypt ssl running, once you are moved to new host and everything settles after a few weeks.

Hope this helps you.

Yes you can,you only reinstall again on your website.

This is rule Letsencrypt , you must renew your SSL every 3 month, there are do problem with renew, many Hosting panels support LE SSL and you can renew this SSL easy for example in Cpanel.

That's correct! Let's encrypt is valid for 90 days only, after that you will need to renew it. Many hosting provider provides it as the free service so your Let's Encrypt SSL certificate will be renewed automatically. If there is no automatic process then you will need to contact your SSL certificate provider or hosting provider.

For any SSL certificate, after moving to new host, you have to re-install it from their server as SSL certificate used to work from the server where your website is pointing. So make sure, before pointing your website to new server, do not install the SSL certificate from that server, it won't work.