When looking for the most stable VPN, distinguish between “unable to connect” and “disconnects after connecting.” The first is measured by connection success rate; the second by disconnection rate. A page that occasionally stalls may instead point to DNS resolution, routing rules or the destination website. A useful comparison records results on the same network and at similar times rather than treating a single speed test as a ranking.
This article does not publish brand rankings without supporting test records or invent success rates. The comparison table, logging template and steps below can help you compare different services or choose routes within the same subscription. Keep conclusions limited to the devices, networks and use cases actually tested.
What Connection Success and Dropout Rates Tell You
Connection success rate measures whether an initiated connection reaches a usable state. A client showing “Connected” does not necessarily mean the target app works. Before testing, agree on a success criterion: the connection status is normal, a request to a specified target completes, and—where a proxy is needed—traffic is confirmed to use the expected egress.
Disconnection rate needs a clearly stated measurement method. It may mean the share of sessions with an unexpected disconnect, or the number of disconnects per unit of online time. These measures are not interchangeable. Short sessions and long work sessions have different exposure times, so comparing only total disconnect counts is also unfair.
| Metric | How to record or calculate it | Main question answered | Common source of confusion |
|---|---|---|---|
| Connection success rate | Successful attempts ÷ all attempts, expressed as a percentage | Can you connect when you need to? | Automatic retries are omitted, so failures are undercounted |
| Share of sessions with a dropout | Sessions with an unexpected disconnect ÷ all valid sessions | Is a session likely to be interrupted? | Intentional disconnects or device sleep are counted as route failures |
| Disconnects per unit of time | Unexpected disconnects ÷ total valid online time | How often are interruptions likely during sustained use? | Total disconnect counts are compared despite different test durations |
| Service interruption and recovery | Record app errors, proxy status and time to recover | How are meetings, transfers or web tasks affected? | The proxy remains connected while the target service has an issue |
If there have been no valid sessions, mark the disconnection metric as “no valid samples,” not “no disconnects.” An automatic reconnect may restore network access, but it does not mean there was no interruption. For meetings and remote sessions, the recovery process itself is a cost worth recording.
Route Types, Peak Hours and Egress Redundancy
Direct connections, relays and IEPL
A direct connection usually means the client reaches an overseas service node over the public internet. With a relay, the client connects to an entry point, which then forwards traffic to an egress point. Relays add a step but may improve access through a better route. The result depends on the entry location, cross-border path, load and egress quality; the label alone does not determine which option is better.
IEPL generally refers to an international Ethernet private line connecting network endpoints in different regions. Even when a service route uses this type of link, the paths from the user to the entry point and from the egress point to the destination website still matter. “Private line” does not guarantee that every segment is congestion-free. Check the service details and test in your own network environment.
Why a route may work by day but struggle at peak times
Shared entry points, cross-border links or egress bandwidth can face competition during busy periods. Symptoms may include new connection timeouts, longer page loads or lag in real-time apps. Local wireless interference and other transfers on a home network can look similar. Check the local network before comparing routes, or you may mistake an access-side issue for a service-route problem.
Egress redundancy provides an alternative path when something goes wrong, but different nodes in a list are not necessarily independent. They may share entry points, upstream providers or egress resources. Observe whether the same fault persists after switching, but do not assume that different region names prove independent redundancy.
Set the Conditions Before You Test
If you change devices, clients and networks at the same time as changing services, it becomes difficult to identify the cause of a result. Compare on the same device and access network, using the same target app where possible. If clients cannot be kept consistent, record their names, versions, proxy modes and key settings rather than hiding those differences in the results.
- ✅ Keep the target task consistent: for example, access the same webpage, use the same meeting app or transfer the same test file.
- ✅ Keep comparison conditions consistent: use the same observation duration, connection timeout and operation order, and write them down in advance.
- ✅ Separate test periods: record busy and quieter periods separately so averages do not conceal peak-hour issues.
- ✅ Disable automatic route selection: test fixed nodes first; record failover separately to avoid mixing results.
- ✅ Reduce competing traffic and interference: pause unrelated large transfers and avoid having multiple proxy tools change network settings at once.
- ✅ Protect subscription credentials: hide full subscription links, tokens and personal account details in screenshots and support records.
Before importing a subscription, confirm that the client supports the protocols and transport methods in its configuration, then refresh the node list. Subscription links often contain access credentials and should be treated as sensitive information. If a client cannot parse a subscription, first check the import format and version compatibility rather than recording it as a route connection failure.
Keep results for different platforms separate. System proxies on Windows and macOS may not cover every app; virtual network adapter coverage depends on the implementation and routing configuration. Mobile devices may also be affected by background restrictions, power-saving settings and network changes. A stable desktop result does not guarantee the same performance after a mobile device is locked.
Repeatable Connection and Dropout Test Steps
- Establish a local baseline. Disconnect the proxy and check the local network and any normally accessible targets. If the local network is already unstable, mark the environment as abnormal and exclude that round from route rankings.
- Choose a node and start logging. Record the region, node name, protocol, client, proxy mode and start time. Initiate the connection manually and use the agreed timeout to mark success or failure. Keep any error message.
- Confirm it works in practice. Visit the specified target and check which egress is used for requests that require the proxy. A changed connection button alone does not count as verification.
- Run a sustained task. Keep to the agreed observation period and record app lag, failed requests, proxy disconnects and automatic reconnects. When an issue occurs, also check direct access to the target to help distinguish a local network problem from a proxy-path problem.
- Note any intervention. Record node switches, rule changes, sleep or network changes. Start a separate log after an intervention rather than joining it directly to the original session.
- Repeat in rotation and summarize. Repeat the same process on different days, alternating the order in which services or nodes are tested. Summarize connection attempts, valid sessions, online time and unexpected disconnects separately, and keep the raw records.
You can use a local text file or spreadsheet for logging. The fields below are a template, not test results. Record each attempt separately, including failures, so the log does not reflect only successful connections.
Date and time period:
Access network and device:
Client and version:
Node, protocol and proxy mode:
Connection start, end and timeout:
Target task and success criteria:
Connection result and error details:
Valid online time:
Unexpected disconnects and service interruptions:
Automatic recovery and recovery time:
Egress and DNS check results:
Manual switch, sleep or other intervention:Do not keep extending the timeout for failed connections just to get better-looking results. If you need to change the timeout, mark the new condition clearly and retest the other candidate routes. When the sample is small, stating that the observation is limited is more reliable than presenting an apparently precise ranking.
Apparent Dropouts May Actually Be DNS or Routing Issues
If the client still shows a connection but webpages will not load, do not immediately conclude that the tunnel has disconnected. DNS resolution failures, rules sending requests down an unavailable path, apps bypassing the system proxy and a destination service rejecting the current egress can all look similar. Keep the logs before troubleshooting; otherwise, the original cause may be lost.
An egress IP only confirms the request you checked
The egress IP shown by a browser lookup only tells you the path used by that particular web request. With rule-based routing, different domains or apps may use different paths. Check the browser and the actual business app separately, and review the client’s connection logs to see which rules matched. One webpage cannot prove that all traffic is being routed through the proxy.
Interpret DNS checks against the expected policy
A DNS leak usually means that lookup requests did not follow the expected proxy or privacy policy and were sent by another path. The resolver region shown by a test page is only a clue; the region name alone does not prove a leak. Browser Secure DNS, app-specific resolvers and the client’s DNS handling can all affect the result.
For comparison, you can temporarily use global proxy mode, then restore rule-based routing. If global mode works but rule-based mode fails, check rule matching, the resolution path and app proxy support before replacing all routes. Record the original DNS settings before changing them and restore them after testing. For network settings managed by an organization, follow the administrator’s instructions.
How to Choose a Reliable VPN Based on Results
For light web browsing, ease of connecting may matter most. Meetings, remote collaboration and sustained transfers depend more on service interruptions, recovery time and egress changes. Start by identifying your main tasks, then filter routes using the relevant metrics. A route that connects easily but frequently reconnects may not suit long sessions.
A comparison report should include the test environment, time period, measurement method and raw records. A “reliability ranking” without this information is only a lead to investigate. If candidates perform similarly, extend the observation and include your usual use cases instead of deciding based on a single peak-speed result.
If you plan to test MHZVPN, check the route details on the servers page, then follow the process in this article to test your usual destinations. MHZVPN offers 120+ countries and 240+ routes, with no limit on the number of devices online at once. These are service coverage details, not a claim that every route will produce the same test results on every network.
Check costs and refund terms in advance, too. Monthly plans are ¥9.9/month for 60GB, ¥18/month for 250GB and ¥28/month for 500GB; data resets monthly on the activation date. Lifetime data packages are ¥158/300GB, ¥358/1000GB and ¥658/3000GB. A full refund for any reason may be requested within 60 days of the first payment. See the plans page for details. If you run into configuration issues, use Contact Us to share redacted environment details and error records.