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Nginx 413 Request Entity Too Large: Find and Fix the Right Upload Limit
Identify which layer returns Nginx 413 Request Entity Too Large, set the right upload limit, and validate Nginx, PHP-FPM, and WordPress safely.
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8/12/2026 ·Mizael Segovia· 18 min read ·
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Contact UsShort answer: cPanel is usually the first panel to consider when the cPanel/WHM ecosystem and operating many separate accounts matter most; Plesk deserves the first look when you need Windows Server or an integrated site and WordPress workflow; DirectAdmin is a Linux alternative with simpler retail licensing and a natural fit for shared hosting. There is no universal winner. The right choice depends on the operating system, edition, features your provider actually delivers, and the full cost of operations and migration.
If your hosting service already includes a provider-managed panel, compare the whole service before the interface brand. If you will install a panel on your own VPS or dedicated server, add system updates, security, off-server backups, monitoring, and support to the decision: a control panel does not replace server administration.
How to read this comparison: “Fact” marks information supported by official documentation as of August 12, 2026; “recommendation” is a conditional choice; and “editorial inference” interprets operational work and should be validated by testing the exact edition and provider setup.
Which panel to review first for the requirement that matters most
| Panel | Review it first when | Decision advantage | Condition to confirm |
|---|---|---|---|
| cPanel | You manage several Linux accounts and your team, provider, or customer base already operates in cPanel/WHM. | Continuity for people, procedures, and tools inside that ecosystem. | Licensed account count, supported OS, add-ons, and support scope. |
| Plesk | You need Linux or Windows Server, or an agency wants to centralize site and WordPress work. | It is the only one of these three with documented Windows Server support as well as Linux support. | Web Admin, Web Pro, or Web Host edition and the WP Toolkit capabilities it includes. |
| DirectAdmin | Your server will run Linux, you want straightforward retail licensing, or you are evaluating shared hosting. | Published retail plans use visible account and domain limits, and an official API is documented. | Which installer, backups, security, support, and limits the provider adds; an account is not the same as a domain. |
Recommendation: use this table to build a shortlist, not to place an order. Ease depends on the job. Familiarity can make cPanel easier for a hosting operator; a site-focused team may prefer Plesk; another team may find DirectAdmin’s organization more direct. Those are workflow inferences, not the results of a universal usability test.
This guide compares decisions that change day-to-day work: OS compatibility, accounts and roles, sites and WordPress, email, DNS and SSL, backups and restores, migration, APIs and automation, reselling, support, extensions, licensing, and total cost. It also separates three layers that are often blurred together:
RAM, CPU, and speed benchmarks are out of scope. This article does not have a controlled test using identical hardware, OS, stack, load, and configuration, so it does not label any panel “faster” or “lighter.” It also does not assume that a license includes off-server backups, malware protection, email, server support, or a WordPress installer. If you have not defined resources, responsibilities, and limits yet, start with how to choose web hosting.
Fact: the official cPanel system requirements list AlmaLinux, CloudLinux, Rocky Linux, and Ubuntu for new installations. Windows is not a supported platform and should not be treated as a cPanel option.
Published cPanel Cloud licensing changes with the account count. Inventory real, suspended, test, and expected accounts before requesting a quote. Do not substitute “domains” for “accounts”: one account may host multiple domains, depending on configuration and plan.
Recommendation: shortlist cPanel for multi-account Linux hosting when you depend on WHM or the cost of retraining staff and rebuilding automation would be material. Rule it out when Windows/IIS is mandatory. Before committing, confirm the OS release, license tier, account allowance, update policy, administrative access, and which components belong to the provider or a third party.
Fact: Plesk Obsidian publishes supported Linux and Windows Server systems. Of cPanel, Plesk, and DirectAdmin, it is the panel to evaluate when Windows or IIS is a requirement. The exact release list changes, so check the OS version you will deploy rather than relying on the broad labels “Windows” or “Linux.”
“Plesk has WordPress tools” is not enough to make a purchase. Request a list of the functions enabled in the quoted edition, site limits, and separately priced extensions. On Windows, also verify which parts of the stack the provider will operate and which remain your team’s responsibility.
Recommendation: evaluate Plesk first for Windows/IIS or when an agency values an integrated site workflow and the quoted edition includes the WordPress functions it will use. If you only need Linux and will not use those capabilities, compare total cost and operational complexity with cPanel and DirectAdmin on equivalent terms.
Fact: the official DirectAdmin system requirements cover RHEL and derivatives, Debian, and Ubuntu; Windows is not supported. Its retail page publishes plans using accounts and domains, two different units that must be checked separately.
DirectAdmin does not automatically turn a plan into managed hosting or guarantee a WordPress installer, off-server backups, or managed security. Those features depend on the provider’s package. Choosing DirectAdmin does not inherently restrict WordPress either: actual limits come from the plan, resources, PHP and database versions, extensions, isolation, and enabled tools.
Recommendation: include it when you will use Linux, value a simple retail license structure, or are buying shared hosting from a provider that already operates the panel. For a cPanel migration, do not decide on the fee alone: test conversion of email, DNS, databases, cron jobs, certificates, and restores before cutover.
This matrix compares buying criteria rather than icon counts. “Depends” means that the edition, provider, or an add-on changes the answer and must be written into the quote.
Operational comparison as of August 12, 2026
| Criterion | cPanel | Plesk | DirectAdmin |
|---|---|---|---|
| Operating system | Linux: documented new installations on AlmaLinux, CloudLinux, Rocky Linux, and Ubuntu. | Supported Linux and Windows Server releases. | Linux: documented RHEL/derivatives, Debian, and Ubuntu. |
| Windows/IIS | No. | Yes, on supported Windows Server releases; check edition and stack. | No. |
| Organization | cPanel/WHM model with a strong multi-account fit. | Site- and subscription-oriented workflow, with edition-specific capabilities. | Roles and accounts suited to Linux hosting; verify plan limits. |
| License unit | Published Cloud licenses scale by account count. | Web Admin, Web Pro, and Web Host carry different capabilities and limits. | Personal PLUS and Lite separate accounts from domains; Standard states no cap for either. |
| Reselling | A strong candidate when WHM and account separation are already requirements. | Evaluate Web Host and the exact functions offered. | Evaluate the license and provider implementation; do not infer reseller capacity from “domains.” |
| WordPress | Experience depends on provider-enabled tools; do not assume an installer or staging. | WP Toolkit provides edition-dependent capabilities; confirm staging, cloning, and limits. | WordPress runs on a compatible stack; installer and extra management functions depend on the provider. |
| Email, DNS, and SSL | All three can participate in a platform that manages these tasks, but architecture, limits, and responsibility vary. Request included services, authoritative DNS, certificate issuance and renewal, filters, quotas, and delivery support. | ||
| Backups and restores | Confirm destination, retention, cost, and restore testing; a panel is not an off-server copy. | Confirm edition and provider functions, separate storage, and granular restore capability. | Official backup and restore documentation exists; confirm configuration, destination, retention, and tests. |
| API and automation | Require the provider to identify available interfaces, permissions, limits, and change policy before scoring it. | Require the interface for the exact edition and test it with minimum permissions. | Official documented API; validate the required endpoints and permission model. |
| Migration | Documented Transfer Tool, subject to source, destination, and version constraints. | Request a written compatibility matrix, transferred objects, and exceptions for the actual source. | Documents backup/migration and conversion from cPanel; requires space, validation, and a return plan. |
| Support and extensions | A vendor license, provider support, and server administration are different scopes. Record who owns each layer and which add-ons cost extra. | ||
These are operational scenarios, not testimonials or guaranteed outcomes. “First option to validate” narrows the search; the final choice still depends on the quote and a test of critical tasks.
Conditional choices based on workload, platform, and switching risk
| Use case | First option to validate | Why | What could change the answer |
|---|---|---|---|
| One site on managed hosting | The panel included with the strongest overall service; cPanel or DirectAdmin may both be sufficient on Linux. | For one site, support, resources, backups, email, and recovery often matter more than the panel brand. | A required missing feature, plan limits, or an interface the site owner cannot operate. |
| WordPress agency | Plesk when the edition contains the WP Toolkit functions the team will use. | Integrated staging and cloning can remove repeated steps. | cPanel or DirectAdmin may fit better when the provider offers account isolation, backups, and equivalent tooling at a lower total cost. Also review how WordPress installation changes between hosting and a VPS. |
| Reseller with many accounts | cPanel/WHM when current operations and customers already depend on that ecosystem. | Multi-account continuity can avoid retraining and conversion work. | Per-account cost, the right Plesk edition, or a well-operated DirectAdmin package may justify a comparative pilot. |
| Windows Server and IIS | Plesk. | It is the only one of the three with documented Windows Server support. | The exact Windows release, edition, and supported components. If Windows stops being a requirement, reopen the comparison. |
| Self-managed Linux VPS | It depends: cPanel for ecosystem, Plesk for a site workflow, or DirectAdmin for straightforward retail licensing. | The panel is only one part of the workload. | The team’s capacity for patches, firewall, monitoring, backups, incidents, and restores. If that capacity is missing, price a managed service. |
| Existing platform migration | Keep the current panel until you prove that switching creates value and the target reproduces critical objects. | Migration adds risk, testing, and labor; a lower fee alone does not offset an outage or lost email. | End of support, incompatibility, total cost, a Windows requirement, or a verifiable operational improvement. |
For WordPress, do not blame performance on the panel without measuring the site, PHP, database, caching, plugins, theme, and resources. A sequence such as these checks for a slow WordPress site helps separate the interface from the actual bottleneck.
Choose Web Hosting with DirectAdmin to manage your sites through a clear control panel; available features and limits depend on the plan you select.


Dated fact: the figures below are retail prices published by the vendors as of August 12, 2026, in US dollars. They are not a Teramont quote or a universal hosting cost. A provider may bundle the license, use another sales channel, add tax, bill in another currency, or include support and extensions.
Vendor-published license references, not the total hosting price
| Panel | Edition or tier | Published reference | How to interpret it |
|---|---|---|---|
| cPanel Cloud | Solo Cloud | 1 account: US$29.99/month | 2026 cPanel Store pricing. Count licensed accounts rather than domains, then add taxes, add-ons, and purchasing channel. |
| Admin | Up to 5 accounts: US$35.99/month | ||
| Pro | Up to 30 accounts: US$53.99/month | ||
| Premier | 100-account reference: US$69.99/month; US$0.49 per additional account | ||
| Plesk | Web Admin, Web Pro, or Web Host | Check the official pricing page on the purchase date | Compare edition, capacity, billing term, currency, channel, and extensions; this article does not set a universal figure. |
| DirectAdmin retail | Personal PLUS | 2 accounts and 20 domains: US$5/month | Vendor retail pricing. Provider prices may differ; accounts and domains are separate limits. |
| Lite | 10 accounts and 50 domains: US$15/month | ||
| Standard | No stated account or domain limit: US$29/month |
Recommendation: compare monthly and annual total cost using the same inventory and service level. Add the panel license, any OS license or subscription, extensions, backup storage outside the server, restores, email, malware protection or a WAF, monitoring, support, administration hours, and migration. Then model account and domain growth separately.
Do not call the difference between two license fees “savings” until those components are included. Likewise, do not assume that Standard’s lack of a stated account or domain cap removes CPU, RAM, storage, or provider-policy limits. In this comparison, that description applies only to the two retail license measures.
No one can promise a zero-downtime, zero-email-loss migration by default. You can reduce risk with inventory, synchronization, testing, and a controlled window. Difficulty depends on the source, target, versions, customizations, volume, and the objects the migration tool can convert.
Minimum evidence to advance or return to the source
| Gate | Evidence to proceed | No-go or rollback signal |
|---|---|---|
| Before copying | Approved inventory, confirmed compatibility, enough capacity, and a tested restore. | Unowned object, incompatible version, un-restorable backup, or insufficient space. |
| Before cutover | Functional staging, understood differences, final sync plan, and available owners. | Unexplained errors, no email reconciliation plan, or a missing critical function. |
| After DNS change | Web, transactions, email, SSL, scheduled jobs, and observability pass predefined tests. | Loss or corruption, split deliveries, invalid certificates, or a persistent critical failure. |
| Closure | Delta reconciled, new backups verified, documentation updated, and source retained under policy. | Only the home page was checked, or no tested restore route exists. |
A tool reduces manual work, but it does not decide how to handle customizations, unsupported objects, or changes made during cutover. The official cPanel-to-DirectAdmin procedure, for example, should be treated as a conversion that needs capacity and testing—not a guarantee of perfect equivalence.
Ask for written answers about the exact edition and service, not what “the panel can do” in general:
There is no universal answer. cPanel may be easiest for teams already using cPanel/WHM; Plesk may remove steps for site- and WordPress-focused teams; DirectAdmin can feel direct to Linux hosting users. Those are workflow recommendations. Test critical tasks—creating an account, restoring data, cloning a site, managing DNS, and delegating access—in the actual edition before buying.
Plesk. Its documentation includes supported Windows Server releases. cPanel and DirectAdmin are Linux options in this comparison. Confirm the exact Windows release and the components supported by the quoted Plesk version.
Plesk deserves a first look when its edition includes the WP Toolkit functions an agency needs. cPanel fits when the provider and team already operate in that ecosystem. DirectAdmin can host WordPress on a compatible stack and does not inherently restrict it. In every case, resources, PHP, database, caching, backups, and provider support matter more than the panel logo.
Do not assume it does. A panel may expose features, but licensing, configuration, off-server storage, monitoring, and operations are separate scopes. Ask what is enabled, who operates it, which retention or limits apply, and how restores are tested.
The license is one line item. At this article’s cutoff, cPanel and DirectAdmin publish the retail references above; Plesk maintains editions with different capabilities and an official pricing page that should be checked at purchase. Add the OS, extensions, backups, email, security, support, administration, and migration to compare total cost.
You can design a low-impact window, but you cannot guarantee zero downtime or zero loss without knowing the platform. Lower TTL in advance, create and test backups, migrate to staging first, synchronize deltas, protect email flow, and retain a coherent source for rollback.
Not because of the panel name. DirectAdmin does not itself impose a WordPress-specific limitation; actual capacity depends on the Web Hosting plan, resources, available versions, extensions, and provider-enabled tools. Confirm those details in the current offer, and do not infer installers, staging, or backups merely from the presence of DirectAdmin.
Choose cPanel when the cPanel/WHM model, multi-account operations, and continuity with your ecosystem justify its license. Choose Plesk when Windows/IIS is mandatory or its edition gives the team a site and WordPress workflow it will actually use. Choose DirectAdmin for Linux when its license structure, provider package, and operating model fit the inventory better.
The best decision is the one that still works after limits, add-ons, support, administration time, and migration are included. Obtain comparable quotes, test the five most important tasks, and do not change panels without a restorable backup and a written rollback. If you prefer the provider to operate the hosting platform, review the service scope and limits alongside the included panel.
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