Tag Archives: whm

The Hidden Domain Name Lock-In: Which Registrars Restrict Nameservers?

Restricted domain registrars like Wix and Cloudflare, vs flexible domain registrars that let you update your domain nameservers

When buying a domain name, most website owners assume they can point it wherever they choose. However, depending on where you register your domain, you might run into an unexpected limitation: some registrars do not allow you to change your nameservers.

Instead of simply updating your nameservers to point to a new web host, you are forced to manually manage individual DNS records or transfer the domain out entirely. Many platform-operated registrars enforce these restrictions, keeping your DNS tied to

... Continue reading
Posted in Domain Names | Tagged , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

How to Whitelist Googlebot, Bingbot in CSF

WHM ConfigServer Security & Firewall, CSF ignore file

One way to prevent server load spikes and maintain fast performance is to block problematic IP addresses and IP ranges. However, you have to make sure that legitimate crawlers, such as Googlebot and Bingbot, are not accidentally blocked from accessing your websites. Don't crash your SEO! We covered this important step in, “How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks”. If you don't know how to do this whitelisting, this tutorial is for

... Continue reading
Posted in Coding, Server Admin & Security | Tagged , , , , , , , , , , , , , , , , , | Leave a comment

How to Edit .htaccess on the Site Level or Add Rules Globally

WHM Terminal

In "How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks" we talked about how to fix your high server loads. That included adding rules to your site's .htaccess file, or updating the rules globally. If you don't know how to do that yet, this guide is for you.

Crucial First Step: Make a Backup

Before touching .htaccess, always make a copy. A single typo in this file will cause a "500 Internal Server Error" and take

... Continue reading
Posted in Coding, Server Admin & Security | Tagged , , , , , , , , , , , , , , , | Leave a comment

How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks

WHM ConfigServer Security & Firewall

When a server load spikes to 30, 50, or 100+, most sysadmins panic and start haphazardly restarting services or blocking random IP addresses. However, modern attacks are rarely as simple as a single bad IP.

Today’s botnets use distributed Layer 7 (HTTP) floods, rotating through hundreds of unique IPs with only 1 connection each, exploiting web server application queues, fake WordPress scanners, background AJAX polling scripts, and WordPress admin-ajax.php endpoints that lock up MySQL.

This comprehensive guide covers how to diagnose,

... Continue reading
Posted in Coding, Server Admin & Security | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

The Developer’s Guide to Identifying and Optimizing Slow MySQL Queries

Web developer optimizing MySQL queries

This tutorial will guide you through identifying, extracting, and analyzing your most problematic database queries using the command line on a WHM/cPanel server.

If you’re using UltimateWB for your backend, chances are you won’t need any of this. We optimize UltimateWB to run fast whether your website is small or large. But in case you need it - for example, if you are adding complex custom code or building a project from scratch - this guide has you covered.

Related:

... Continue reading
Posted in Coding, Server Admin & Security, Web Hosting | Tagged , , , , , , , , , , , , , , , , , , | Leave a comment