0x000035e9 – Error_Ipsec_Ike_Auth_Fail – IKE Authentication Credentials Are Unacceptable

The error code 0x000035e9 means there is a problem with the security checks needed to connect safely over the internet.

This can happen if usernames or passwords are wrong, certificates have expired, or security settings don't match. When this error appears, you might not be able to connect or see messages saying your login failed.

To fix it, double-check your login details, look at the security rules on both sides, and make sure your devices are up to date. Keeping your login information secure is important to prevent problems and keep your internet connection safe.

Error meaning:

IKE authentication errors mean that the information used to connect to a secure network doesn't match what the server expects.

This can happen if the username, password, or other security details are wrong, stopping the connection from being made.

Causes:

Potential reasons for IKE authentication credential errors:

1. Wrong authentication settings (like mismatched passwords or certificates).
2. Expired or invalid digital certificates.
3. Network problems (such as firewalls blocking important IKE messages).
4. Human mistakes (like typing errors in usernames or passwords).
5. Old software or firmware on devices causing compatibility issues.

Symptoms:

Symptoms of authentication failures in IKE:

1. Cannot connect securely to the VPN.
2. Error messages about authentication problems.
3. Frequent disconnections or timeouts while trying to connect.
4. Logs show specific error codes related to authentication.
5. Confusion due to unexpected security settings or rules.
6. Slow internet or lagging due to failed secure tunnel attempts.

Solutions:

Step 1: Check Authentication Credentials

Make sure the usernames and passwords are correct on both the client and server.

Step 2: Verify Shared Keys or Certificates

Ensure that any shared keys or certificates are valid and have not expired.

Step 3: Review IKE Policies

Look at the IKE policies on both ends and make sure they match.

Step 4: Check Error Logs

Look at the logs for any error messages that might explain the problem.

Step 5: Update Devices

If needed, update the firmware or software on the devices to fix any compatibility issues.

Impact:

1. No Secure Connections: When IKE authentication fails, devices can't talk to each other safely.
2. Data Risks: Important information can be seen or stolen by bad people.
3. Rules Not Followed: Organizations might break security rules, which can get them in trouble.
4. System Overload: Trying to authenticate many times can slow down or crash the system.
5. Connection Problems: Users may not be able to connect to services, making it hard for them to work.
6. Money Loss: If users can't connect, it can cost the organization money.
7. Serious Impact: In places like banks or hospitals, these problems can really hurt people and the organization's image.

Relevance:

The error related to IKE authentication is often associated with Windows versions like Windows 10 and Windows Server 2016, as well as software like Cisco VPN and Fortinet VPN.

This problem can happen when the authentication information is not correct, which can lead to security issues. It's important to check and fix these settings to keep information safe.

Prevention:

1. Keep authentication credentials updated and check them regularly.
2. Use strong passwords and advanced encryption to make security better.
3. Set up network devices to use the newest IKE protocols for better authentication.
4. Watch and record IKE connection attempts to spot problems early.
5. Perform regular security checks and assessments to find and fix weak spots.
6. Teach network administrators about IKE setups and best practices to prevent errors.

People Also Ask

How Does This Error Affect Network Performance?

Authentication errors can slow down the network and make it hard to connect safely. This can cause delays, loss of important information, and make the network less reliable. As a result, users may have a frustrating experience, and work might not get done smoothly.

Can This Error Occur in Virtual Environments?

Yes, this error can happen in virtual environments. They are like real computers, so if something is set up wrong or doesn't match, it can cause problems with logging in. This can affect security and how well everything works together.

Is There a Specific Software Version Associated With This Error?

No, there isn't one specific software version linked to this error. It can happen on different programs and setups. To find out why it happened, you usually need to check the logs and see if the versions you are using work well together.

How Do I Report This Error to Support?

To report an error to support, first collect important details like your system setup, any error messages you see, and the steps to make the error happen. Then, send a ticket through the support channel so they can help you solve the problem quickly.