The 0x000035eb error means that there are problems with a process called IKE, which helps devices talk securely.
This can happen because the settings are wrong, the devices don't match, or firewalls are blocking important messages. When this error occurs, you might notice that your internet doesn't work well, it takes longer to log in, or connections fail more often.
To fix it, check your VPN settings, make sure firewalls allow IKE messages, restart the IKE service, and update your devices. It's important to solve this error to keep your data safe and your network running smoothly.
Error meaning:
An error in IKE negotiations means something went wrong while trying to set up a secure connection.
This could be due to timeouts, wrong settings, or mismatched security options, making it hard for devices to communicate safely.
Causes:
Potential reasons for errors during IKE negotiations:
- Network devices are not set up correctly (wrong IP addresses, subnet masks, or pre-shared keys).
- The encryption methods or protocols do not match between the two devices.
- Firewalls are blocking important IKE messages.
- Slow network speed or lost data packets make it hard to send messages on time.
- Devices have old software or firmware that causes compatibility problems.
Symptoms:
- Intermittent connectivity issues: Users may struggle to connect securely to remote networks.
- Delays during authentication: Users experience longer wait times when trying to log in.
- Increased failed connection attempts: Network logs show more errors when trying to connect.
- Specific error messages: Users might see warnings about IKE negotiation problems.
- Unstable VPN connections: Users can get disconnected unexpectedly, hurting productivity.
Solutions:
Step 1: Check the VPN Settings
Make sure both ends of the VPN connection have the same settings.
This includes the encryption algorithms and authentication methods.
Step 2: Verify Firewall Settings
Look at the firewall settings to ensure that IKE traffic is allowed.
This usually means checking that UDP ports 500 and 4500 are open.
Step 3: Restart IKE Service
Restart the IKE service on the devices that are having issues.
This can fix temporary problems.
Step 4: Update Device Software
Make sure the software and firmware on the devices are up to date.
This helps fix any compatibility issues.
Step 5: Check the Logs
Look at the logs on the devices.
They can show you what went wrong during the IKE negotiation and help you find a solution.
Impact:
IKE negotiation errors can prevent devices from creating secure connections.
This means users cannot safely communicate over the network.
Important apps and services that use VPNs may become unavailable.
Users might lose time and be less productive because they can't access what they need.
If this problem lasts too long, it could let bad guys see private information since data might be sent without security.
Fixing these errors can cost money and time for organizations.
It's important to solve IKE negotiation issues to keep the network safe and users happy.
Relevance:
The IKE negotiation error x000035eb – Error_Ipsec_Ike_Negotiation_Pending is often seen in Windows operating systems, especially in Windows 10 and Windows Server 2016.
It can also occur with specific VPN software that uses IKE for secure connections.
This error means there is a problem with the way the computers are trying to set up a secure connection.
Prevention:
To avoid encountering the IKE negotiation error x000035eb in the future, follow these steps:
- Update Devices: Regularly update the firmware and software of all network devices.
- Monitor Traffic: Keep an eye on network traffic to spot problems before they get bigger.
- Configure Firewalls: Set your firewall settings to allow IKE and IPsec traffic.
- Use Strong Authentication: Use good authentication methods and keep pre-shared keys safe.
- Set Up Backups: Have backup plans and alternative paths ready in case one connection fails.
People Also Ask
What Devices Are Commonly Affected by This Error?
Devices that often have problems with IKE negotiation are routers, firewalls, and VPN concentrators. These devices can have trouble making secure connections because of mistakes in their settings or problems with the network.
How Can I Check the Current IKE Negotiation Status?
To check the current IKE negotiation status, go to the management part of your network device. Look for the VPN or security section. There, you can see the logs or commands that show how the IKE negotiations are going and what stage they are in.
Are There Specific Software Versions More Prone to This Error?
Some software versions can have more problems with IKE negotiation errors because of bugs or how they work with other programs. It's a good idea to check the release notes and what other users say to find out which versions are causing trouble and to update them if needed.
Can This Error Affect Internet Connectivity?
Yes, this error can hurt your internet connection. When the IKE negotiation is waiting, it stops secure connections from working. This can cause problems with your network and make it hard to use apps that need those safe connections.
What Logging Methods Can Help Diagnose This Issue?
To help find problems with network connections, use logs like syslogs, packet captures, and event monitors. These tools show what went wrong and help you find out why it happened quickly.