I have an ASP.NET site hosted on GoDaddy Plesk. I'm restricting site access using a whitelist of IP addresses to prevent web crawlers from seeing it, but the clients who need to see the site have residential internet service with a non-static IP address. Is there a way to give them access without removing the whitelist altogether? They can always purchase static IP from the ISP, but for $15/month, I'd like to see if there's a viable, free/cheaper option.

1 Answer 1


Most broadband providers provide dynamic IP addresses so whitelisting is not realistic and one of the reasons why generally people don't use it. You will not be able to blacklist and whitelist in this manner but you can whitelist an IP range since most internet providers will allocate C class IP addresses to the area where the user is accessing the service from.

To understand C class IP addresses here is a quick rundown: = A.B.C.D, so if the the user has an IP address of the C class would be 1, so you could allow just 24.115.1.* which means to But some ISPS run with many C class IP addresses in some areas, especially if they are DENSE populated ones, so you need to monitor it and keep adding them as they appear, eventually you will catch them all, until the ISP adds more to that area.

But there's no need to restrict by IP address

Plesk is not the weakest link, most hackers won't even attempt it if the Plesk is updated regularly and becomes near impossible to hack without a 0-day hack which most often that would be sold to intelligence services anyhow! (cough tinfoil hat).

If you want to lock down your Plesk, do yourself and your users a favor by enforcing Plesk users to use two-way authentication, Plesk has several plugins that allow this, i.e Plesk, Google two-way authentication.

  • Thanks for your thorough answer. However, since my site is hosted on a shared server through GoDaddy, I can only choose from a small list of applications to install, and Google Authenticator is not on the list. Is it possible to use built-in Windows authentication on the site without a whitelist? That way at least it's still locked down. Any way I can accomplish this without having to manually code authentication into my site, I'm willing to try. I'm hoping to avoid whitelisting large IP address blocks, as web crawlers and other users could still potentially get through. Jun 28, 2017 at 17:59
  • Active Directory and LDAP authentication is not a feature of Plesk and can only be extended through the use of Plugins. If you are concerned about security then really you shouldn't be using an 'open' shared hosting environment. If you want security and the flexibility in controlling the login process outside of what Plesk provides out of the box then the platform you should be using is a Virtual Machine or Dedicated server. Microsoft Azure provides a pay monthly Plesk Onyx license on Windows or Linux. Jun 29, 2017 at 15:36
  • I'm not concerned with security so much as I am with privacy, making sure ugly in-progress stuff isn't seen by web crawlers and unsuspecting Googlers. As far as I know, shared hosting on GoDaddy is secure enough for my purposes. All I really need to know is if GoDaddy offers Windows user accounts on shared servers. In theory, they could create a user account with only permissions for my site directories, no RDP, etc., and that would do the trick. I suppose I'll go see if they offer that. Jun 29, 2017 at 18:11
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    GoDaddy will just tell you to get a VM. Shared hosting environments are locked down to the very basics to ensure compatibility, little maintenance, reliability, and security. Furthermore, in terms of privacy, shared hosting is absolutely awful because your data is openly stored on the server which can be accessed by anyone at GoDaddy and Hackers which can come onto the system through someone else's site. Also, from time to time and it is rare but does happen that sites can sometimes index on someone else's domain. If you want privacy, VM, if you want security VM if you want more control VM. Jun 30, 2017 at 1:56
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    You can get a VM roughly for the same cost of your GoDaddy anyway. Azure has an image with Windows and Plesk that can be fired up within a couple of mins and your away. Also, you can signup as a developer and your get £20 a month credit for one year which will cover most of the costs. Anyhow, up to you but shared hosting is limited for many reasons, mostly price. Jun 30, 2017 at 1:59

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