For most applications, start with a provider’s managed WAF rules for broad baseline coverage, then add custom rules for specific policies those rules do not address. Managed rules reduce the burden of writing common detections; custom rules let you enforce requirements unique to your routes and traffic. Many deployments use both, but coverage, rule order, available actions, and plan limits vary by product.
What is the difference between managed and custom WAF rules?
A web application firewall (WAF) checks web requests against rules and takes actions such as allowing, blocking, logging, or challenging them. The key difference is who defines and maintains the detection logic.
- Managed rules are predefined rule collections maintained by a provider, service, or—in some products—a Marketplace publisher. They are intended to cover common attack patterns, but similarly named rule sets do not guarantee identical coverage.
- Custom rules are conditions and actions your team defines for its own application or traffic policy. They can address needs such as restricting a sensitive endpoint or blocking a known source, but your team owns their testing and upkeep.
For example, Azure documents platform-managed protection for common attacks alongside customer-authored rules, while AWS WAF offers groups maintained by AWS, Marketplace providers, customers, or other AWS services. Check the rule set, version, and configuration for the WAF you actually use: Azure Front Door WAF policy settings, Azure Application Gateway custom rules, and AWS WAF rule groups.
Which approach fits your application?
Choose managed rules for a maintained starting point
Managed rules are a practical baseline when you need coverage for common threats without writing and maintaining every detection yourself. They are not a substitute for checking whether the selected set, version, and configuration fit your application and WAF tier. Tuning may still be necessary, including when a rule incorrectly matches legitimate requests or when a rule-set version changes.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Choose custom rules for a clear, application-specific policy
Custom rules fit requirements that can be expressed as a concrete match condition and action—for example, a restriction on a particular route or traffic characteristic. Before adding one, be able to explain what it matches, what it should do, and how you will tell whether it is affecting legitimate traffic. Bespoke logic creates ongoing work: someone must validate it, monitor its impact, and maintain it as the application changes.
Use both when the needs are different
A common policy combines managed rules for broad baseline detection with narrowly scoped custom rules for application-specific controls. The combination only works as intended if you understand evaluation order and whether an action ends further checks. There is no single WAF-wide execution model: Azure Front Door processes custom rules before managed rules, while Cloudflare evaluates custom rules in order and some actions stop later evaluation. See Azure Front Door policy settings and Cloudflare custom rules.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Compare the trade-offs before choosing
| Decision point | Managed rules | Custom rules |
|---|---|---|
| Who owns the logic? | A provider, service, or Marketplace maintainer, depending on the group. AWS documents all of these ownership models. | Your application or security team defines and owns the conditions and actions. |
| Typical role | Baseline coverage for common attacks and, depending on the group, particular use cases. | Specific application or traffic policies, subject to the WAF’s available match conditions and actions. |
| Main tuning work | Review false positives; use available rule overrides or exclusions; account for version changes. | Write, validate, order, and maintain bespoke logic. |
| Evaluation behavior | Provider-specific; a managed group may run after custom rules or as part of an ordered rule flow. | Provider-specific; priority and terminating actions can affect later checks. |
| Best fit | Teams seeking a maintained starting point that have confirmed the set suits their application and tier. | Teams with a clear, testable policy and the capacity to monitor its effects. |
These are operational trade-offs, not a universal cost ranking. The documented capabilities differ by service, and they do not establish a general price winner. Compare the specific product’s coverage, tier limits, available actions, tuning effort, and total service cost before deciding.
How to roll out WAF rules safely
- Map the deployment. Identify the WAF product and where it sits in your architecture, the routes it protects, and the application’s legitimate traffic patterns.
- Inspect the managed baseline. Review the provider’s rule coverage, available versions, configuration options, and any tier requirements. Do not assume that similarly named rule sets detect the same things.
- Observe before enforcing, where supported. For Azure, Microsoft recommends starting managed rules in Detection mode, reviewing logs, tuning narrowly scoped exclusions or overrides, and then moving to Prevention mode. This lets teams examine matches before choosing to block them. See Microsoft’s Azure WAF best practices.
- Add custom rules only for stated gaps. Record the condition, action, owner, expected effect, test cases, and rollback path for each rule. Keep exclusions narrow rather than disabling more protection than the issue requires.
- Check priority and termination. Determine which rules run first and whether an allow, block, skip, or other action prevents later rules from evaluating the request. Confirm the behavior in the documentation for your exact WAF.
- Test and monitor enforcement. Exercise representative legitimate and malicious requests, check logs after rollout, and revisit rule-set versions and provider changes. AWS advises testing and tuning protection changes before production; its guidance is at Testing and tuning AWS WAF protections.
Provider behavior to verify
Azure Front Door and Application Gateway
Azure Front Door policies can combine customer-authored custom rules with provider-maintained managed rule sets. Custom rules are processed first, and whether evaluation continues depends on the action. Azure Application Gateway WAF v2 offers a platform-managed set for common attacks; its custom rules can allow, block, or log matching traffic and have higher priority than managed sets. Allow and block outcomes stop further rule evaluation. These are product-specific behaviors, not a general rule for every WAF. See Front Door policy settings and Application Gateway custom rules.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
AWS WAF
AWS WAF supports customer-created rule groups, AWS Managed Rules groups, Marketplace-managed groups, and groups managed by other AWS services. Depending on the group, configuration can include version selection, rule-action overrides, and scope-down statements. Test and tune changes before deploying protection to production. See AWS WAF rule groups and AWS WAF testing guidance.
Cloudflare
Cloudflare custom rules use request expressions and actions such as Block or Managed Challenge. They run in order, and some actions can stop subsequent rules. Available rule counts, actions, and regular-expression support depend on plan, so check current entitlements for the account and deployment rather than assuming a feature is available. See Cloudflare custom rules.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Common mistakes to avoid
- Treating “managed” as universal coverage. Rule groups, ownership, versions, and configuration differ by service.
- Blocking on first sight of a match. A detection can also match legitimate application traffic. Review logs and tune before enforcement where the product supports a detection or monitoring mode.
- Using broad exclusions to silence a false positive. Prefer a narrowly scoped override or exception so that unrelated requests retain protection.
- Assuming rule order is portable. Priority, action semantics, and whether evaluation stops vary by product and policy.
- Adding custom rules without an owner or rollback plan. Application routes and traffic change; an unmaintained rule can create false positives or fail to enforce the intended policy.
- Comparing services on rules alone. Consider the product tier, available actions, limits, tuning burden, and overall cost for the deployment.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
