Myth #7 – HTTPS Never Caches
People often claim that HTTPS content is never cached by the browser; perhaps because that seems like a sensible idea in terms of security. In reality, HTTPS caching is controllable with response headers just like HTTP. Eric Lawrence explains this succinctly in his IEInternals blog:It comes as a surprise to many that by-default, all versions of Internet Explorer will cache HTTPS content so long as the caching headers allow it. If a resource is sent with a Cache-Control: max-age=600 directive, for instance, IE will cache the resource for ten minutes. The use of HTTPS alone has no impact on whether or not IE decides to cache a resource. (Non-IE browsers may have different default behavior for caching of HTTPS content, depending on which version you’re using, so I won’t be talking about them.) The slight caveat is that Firefox will only cache HTTPS resources in memory by default. If you want persistant caching to disk you’ll need to add the Cache-Control: Public response header.Myth #6 – SSL Certificates are Expensive
If you shop around you can find SSL certificates for about $ 10 a year or roughly the same cost as the registration of a .com domain for a year.(UPDATE: you can get domain validated SSL certificates for free. See comment #1) The cheapest certificates don’t have the level of company verification provided by the more expensive alternatives but they do work with nearly all mainstream browsers.Myth #5 – Each HTTPS Site Needs its Own Public IP Address
With the pool of IPv4 addresses running low this is a valid concern and it’s true that only one SSL certificate can be installed on single IP address. However, if you have a wildcard SSL certificate (from about $ 125 yr) you can have as many sub-domains as you like on a single IP address. Myth #4 – New SSL Certificates Have to be Purchased When Moving Servers or Running Multiple Servers
Buying an SSL certificate involves:Creating a CSR (SSL Certificate Signing Request) on your web server
Purchasing the SSL certificate using the CSR
Installing the SSL certificate by completing the CSR process
These steps are designed to ensure that the certificate is safely transferred to the web server and prevents anyone from using the certificate if they intercept any emails or downloads containing the certificate in step 2). The result is that you cannot just use the files from step 2) on another web server. If you want to do that you’ll need to export the certificate in other format.Read more: HTTP Watch
People often claim that HTTPS content is never cached by the browser; perhaps because that seems like a sensible idea in terms of security. In reality, HTTPS caching is controllable with response headers just like HTTP. Eric Lawrence explains this succinctly in his IEInternals blog:It comes as a surprise to many that by-default, all versions of Internet Explorer will cache HTTPS content so long as the caching headers allow it. If a resource is sent with a Cache-Control: max-age=600 directive, for instance, IE will cache the resource for ten minutes. The use of HTTPS alone has no impact on whether or not IE decides to cache a resource. (Non-IE browsers may have different default behavior for caching of HTTPS content, depending on which version you’re using, so I won’t be talking about them.) The slight caveat is that Firefox will only cache HTTPS resources in memory by default. If you want persistant caching to disk you’ll need to add the Cache-Control: Public response header.Myth #6 – SSL Certificates are Expensive
If you shop around you can find SSL certificates for about $ 10 a year or roughly the same cost as the registration of a .com domain for a year.(UPDATE: you can get domain validated SSL certificates for free. See comment #1) The cheapest certificates don’t have the level of company verification provided by the more expensive alternatives but they do work with nearly all mainstream browsers.Myth #5 – Each HTTPS Site Needs its Own Public IP Address
With the pool of IPv4 addresses running low this is a valid concern and it’s true that only one SSL certificate can be installed on single IP address. However, if you have a wildcard SSL certificate (from about $ 125 yr) you can have as many sub-domains as you like on a single IP address. Myth #4 – New SSL Certificates Have to be Purchased When Moving Servers or Running Multiple Servers
Buying an SSL certificate involves:Creating a CSR (SSL Certificate Signing Request) on your web server
Purchasing the SSL certificate using the CSR
Installing the SSL certificate by completing the CSR process
These steps are designed to ensure that the certificate is safely transferred to the web server and prevents anyone from using the certificate if they intercept any emails or downloads containing the certificate in step 2). The result is that you cannot just use the files from step 2) on another web server. If you want to do that you’ll need to export the certificate in other format.Read more: HTTP Watch
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