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Error 0x0000362C means ERROR_IPSEC_IKE_POLICY_MATCH, or “Policy match error.” Windows reached an IPsec/IKE negotiation but could not find a compatible policy on the other endpoint. The practical fix is to identify the VPN or IPsec operation, compare both sides’ phase-1 and phase-2 settings, and correct the first mismatch without weakening authentication or encryption. If the code appears during Windows Update or setup instead, use the Windows Update troubleshooting and system-maintenance branch described below; those steps address damaged update components, not an inherently mismatched VPN policy.
The hexadecimal code does not identify one universal bad setting. Encryption, integrity or hash, Diffie-Hellman group, authentication or certificate identity, traffic selectors, lifetimes, duplicate rules, and third-party filtering software can all lead to the same result.
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What does error 0x0000362C mean?
0x0000362C is the Win32 value for ERROR_IPSEC_IKE_POLICY_MATCH. IPsec uses Internet Key Exchange (IKE) to authenticate two endpoints and agree on cryptographic parameters before protected traffic can pass. A policy-match error occurs when the proposals offered by the two sides cannot be paired.
Think of the negotiation as a checklist rather than a single password. Both endpoints must have at least one compatible choice for encryption, integrity, key exchange, authentication, traffic selectors, and lifetime. If one side offers only AES-GCM with a particular Diffie-Hellman group while the other side allows a different set, IKE can stop before the tunnel is established.
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The code does not prove that Windows itself is damaged, that a disk is failing, or that a computer is infected. It also does not reveal which proposal was rejected. The VPN client, firewall rule, remote gateway, certificate configuration, and event logs are needed to locate the exact mismatch.
When does the error appear, and which endpoint is involved?
Start by recording the operation that produced the message. The same code can be displayed by different components, and the repair path depends on whether Windows is acting as a VPN client, a VPN gateway, or an IPsec policy engine.
- Write down the date and exact time, including your time zone.
- Record whether the failure occurred while connecting to a remote-access VPN, bringing up a site-to-site tunnel, applying a Windows Firewall connection-security rule, or performing another network operation.
- Note the VPN application or gateway model, its version, and the remote peer’s address or name.
- Record whether the problem began after a Windows update, VPN-client update, certificate renewal, firewall-rule change, driver installation, or security-product installation.
- Repeat the operation once and note whether the error is immediate or follows a period of negotiation. A consistent timestamp makes event-log correlation much easier.
For a site-to-site connection, you normally need an administrator on both ends. For a personal VPN client, you may control the local settings but not the provider’s proposals. Do not assume that the computer showing the message is the side with the incorrect policy.
How do I compare the IKE and IPsec policies?
Compare the complete proposal sets on both endpoints, not just one visible “VPN security” setting. The first compatible combination wins; an obsolete or duplicate rule can cause a different proposal to be selected than the one you intended.
Phase 1 (IKE) values
- Encryption: Compare the algorithms and key sizes offered for the IKE security association.
- Integrity or hash: Check the authentication hash or integrity algorithm and its order of preference.
- Diffie-Hellman group: Confirm that the key-exchange group is enabled on both sides.
- Authentication: Match the method, such as a pre-shared key or certificate-based identity, and verify that the expected identity is presented.
- Lifetime: Compare the rekey interval and any allowable lifetime range.
Phase 2 (IPsec) values
- Encryption and integrity: Match the ESP or AH proposal and its ordering.
- Traffic selectors: Compare local and remote networks, addresses, ports, and protocols. A subnet mask or address-range difference can prevent a match even when the cryptographic settings agree.
- Perfect Forward Secrecy: If enabled, verify that the phase-2 Diffie-Hellman group is supported on both ends.
- Lifetime: Check both time- and data-based rekey limits where the products expose them.
| Item to compare | What a mismatch looks like | Safe action |
|---|---|---|
| Encryption | No common algorithm or key size | Choose a cryptographically acceptable algorithm enabled on both sides; preserve the organization’s security baseline. |
| Integrity/hash | One side requires a hash the other does not offer | Add the approved common option or correct the proposal order. |
| Diffie-Hellman group | Groups differ between phase 1 or phase 2 | Use a group supported by both products and approved by the administrator. |
| Authentication and identity | Certificate subject, issuer, pre-shared key, or identity type differs | Verify the credential, trust chain, identity ID, and authentication method on both endpoints. |
| Traffic selectors | Local and remote subnets, ports, or protocols do not overlap | Correct the network definitions; do not broaden them merely to make a test pass. |
| Lifetime | Rekey or data limits are incompatible | Set compatible values within the deployment’s documented limits. |
Remove or disable duplicate and obsolete rules only after exporting or recording the current configuration. A broad, older rule can be selected before the intended rule and create a policy mismatch that appears intermittent.
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How do I check Windows Firewall and IPsec services?
Windows may have a correct VPN profile but an incorrect connection-security rule or a service that has not reloaded recent changes. Inspect the configuration before restarting anything so that you retain evidence of the original state.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems- Open Windows Defender Firewall with Advanced Security. In the left pane, select Connection Security Rules and review rules that apply to the affected interfaces, addresses, and authentication requirements.
- Check rule order, enabled status, endpoint addresses, authentication method, and the associated IPsec settings. Look for a newly created rule that overlaps an older rule.
- Open Services by running
services.msc. Locate IKE and AuthIP IPsec Keying Modules and IPsec Policy Agent. Record each service’s status and startup type. - After recording the configuration, restart the affected service only if your change-control process permits it. Restarting can tear down active tunnels and may affect other users.
- Retry the connection and record the new timestamp. If the error changes, preserve both sets of event-log entries.
Do not delete all connection-security rules or reset the firewall as a first step. That can remove unrelated protections and destroy the information needed to identify the selected policy.
Could a VPN client, firewall, or driver be interfering?
Yes. Third-party VPN clients, endpoint-security products, personal firewalls, and network-filtering drivers can intercept or modify traffic before IKE completes. Test this branch carefully and only with administrator approval or an established change-control procedure.
- List software installed or updated immediately before the failures began.
- Update the VPN client from its vendor and install the current network-adapter driver from the hardware or computer manufacturer.
- If policy allows, perform a brief diagnostic test with the recently added VPN, firewall, endpoint-security, or filtering component disabled. Disconnect from untrusted networks while protection is paused, and re-enable the component immediately after the test.
- Retry the same connection and compare timestamps. If the policy-match error disappears, contact the product vendor or administrator with the test result rather than leaving security software disabled.
- If the error remains, restore the original configuration and continue with policy and event-log analysis.
A driver update can correct a damaged network interface, but it cannot make incompatible IKE proposals agree. Treat driver work as a conditional check, not a substitute for comparing both policies.
What should I do if 0x0000362C appears during Windows Update or setup?
When the message is tied to downloading or installing a Windows update rather than a VPN connection, use Microsoft’s built-in update workflow first. Microsoft says its Update Troubleshooter can help when an error code appears while downloading and installing updates.
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Windows 11
- Open Settings > System > Troubleshoot > Other troubleshooters.
- Find Windows Update and select Run.
- Apply any recommended repair, restart Windows, and select Settings > Windows Update > Check for updates.
Windows 10
- Open Settings > Update & Security > Troubleshoot > Additional troubleshooters.
- Select Windows Update, then choose Run the troubleshooter.
- Restart the computer and check for updates again.
If the code also appears in a VPN client or connection-security event at the same time, do not assume the update troubleshooter corrected the IPsec policy. Treat the two symptoms as separate until their timestamps and logs show a common cause.
When should I clear the update cache or repair system files?
Use these maintenance steps only when update or setup files appear damaged, updates repeatedly fail, or Windows reports component-store or system-file problems. They do not align an IPsec policy by themselves.
Before maintenance
- Confirm that automatic date and time are enabled; an incorrect clock can invalidate update or certificate operations.
- Make sure the system drive has sufficient free space for the update and temporary files.
- Save work and close applications. System-file repairs can take time and may require a restart.
- Use an administrator account and create a record of any existing error messages.
Clear the Windows Update cache
Microsoft documents a procedure for stopping update-related services, renaming the Windows Update cache folders, and starting the services again. Follow Microsoft’s current procedure for your Windows version rather than deleting folders while services are running. Renaming preserves the old data for rollback and avoids destroying evidence prematurely.
Run DISM and System File Checker
- Open Command Prompt as administrator.
- Run
DISM.exe /Online /Cleanup-image /Restorehealthand wait for it to complete. - Then run
sfc /scannowand allow verification to reach 100 percent. - Restart Windows and retry the update or setup operation.
If DISM or SFC reports files it cannot repair, record the exact result and investigate the component-store or installation-media issue indicated by that message. Do not repeatedly run repairs without preserving the first diagnostic output.
Which troubleshooting option should I try first?
The safest sequence starts with reversible evidence collection and moves toward changes that require broader access. Use the scope and risk of each option to decide where to spend time.
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| Option | Scope | Reversibility | Access needed | Evidence produced |
|---|---|---|---|---|
| Record operation and timestamps | VPN, IPsec, firewall, or update identification | Fully reversible | Local user access | Exact failure time and affected endpoint |
| Compare phase-1 and phase-2 proposals | VPN policy negotiation | Read-only until a setting changes | Local and usually remote administrator | Proposal lists, identities, selectors, and lifetimes |
| Review connection-security rules | Windows Firewall/IPsec selection | Read-only review; edits reversible if documented | Local administrator | Rule order, scope, and authentication requirements |
| Restart IPsec services | Local policy reload | Usually reversible but disrupts tunnels | Local administrator | Post-restart event timestamps |
| Test third-party software | VPN, firewall, endpoint, or filter interference | Reversible if re-enabled immediately | Administrator and change approval | Before-and-after connection results |
| Run update maintenance | Windows Update or setup files | Cache rename and repairs can be reversed or reviewed | Local administrator | Troubleshooter, DISM, and SFC results |
Do not jump directly to a weaker encryption algorithm, a less strict authentication method, or a wider traffic selector just to obtain a connection. Any temporary compatibility change should be approved, documented, and reverted or replaced with a secure common proposal.
How do I use logs to find the rejected policy?
Event logs can show which stage failed and which proposal was selected or rejected, but the exact log name varies by VPN product and Windows configuration. Filter entries around the timestamp you recorded and export the relevant events before changing settings.
- Search Windows event logs for entries from IPsec, IKE, AuthIP, Windows Filtering Platform, or the VPN client.
- Look for text naming an authentication failure, certificate identity, proposal, selector, lifetime, or peer address.
- Compare the event’s local and remote addresses with the rule you expected to apply.
- Capture the VPN client version, Windows edition and build, driver version, and any recent configuration change.
For business tunnels, send the administrator or vendor the exact code, event-log time, local and peer proposal lists, certificate or identity details, and recent rule or driver changes. This evidence is more useful than a screenshot without context and avoids repeated trial-and-error changes.
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What is different between Windows 11 and Windows 10?
The Windows Update troubleshooter paths differ, but the IPsec diagnosis is fundamentally the same: compare both endpoints’ policies and identities. Windows 11 and Windows 10 can both display the same Win32 code when their IPsec/IKE negotiation fails.
Microsoft states that support for Windows 10 ended on October 14, 2025. In 2026, a Windows 10 installation may not receive free Windows Update support unless a separate entitlement applies. That support status does not change the meaning of 0x0000362C; it affects where you can obtain update assistance after local troubleshooting.
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What should I avoid when fixing this error?
- Do not assume the hexadecimal value identifies one bad checkbox.
- Do not disable all firewall or endpoint protection permanently.
- Do not delete certificates, VPN profiles, or IPsec rules before exporting or recording them.
- Do not broaden traffic selectors or downgrade encryption without an approved security decision.
- Do not treat DISM, SFC, or cache cleanup as a replacement for aligning the two VPN policies.
- Do not repeatedly restart services while changing several settings at once; you will lose the ability to tell which change mattered.
A disciplined sequence—observe, compare, change one controlled variable, retry, and record the result—usually produces a faster and safer diagnosis than a full reset.
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Frequently Asked Questions
Can a bad certificate cause 0x0000362C even when the encryption settings match?
Yes. IKE can reject a negotiation when the certificate identity, issuer trust, expiration, usage, or requested identity does not satisfy the peer. Check the certificate chain and the identity configured in the VPN profile on both endpoints.
Will changing only the VPN server address fix this policy-match error?
Usually not. A wrong address can prevent contact with the intended peer, but once IKE reaches a peer, 0x0000362C generally points to incompatible proposals, identities, selectors, or lifetimes. Verify the peer address in logs before changing policy values.
Why does the tunnel work from one network but fail from another?
Different networks can introduce NAT, filtering, or another security device that changes how IKE or IPsec traffic is handled. Compare timestamps and logs from both locations, and ask the network administrator whether UDP or ESP traffic is being filtered.
Should I reset the Windows network stack after seeing this code?
A network reset removes or recreates adapters and profiles, so it is not a first-line policy fix. Consider it only after documenting VPN settings and confirming that the problem is local to a damaged adapter configuration rather than a proposal mismatch.
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