# Installed tap not working Linkerd 2.14

**URL:** <https://linkerd.buoyant.io/t/installed-tap-not-working-linkerd-2-14/445>\
**Category:** Linkerd General Discussion\
**Tags:** getting-started, configuration, metrics, tracing, certificates\
**Created:** [April 18, 2024, 12:06pm UTC](https://linkerd.buoyant.io/t/installed-tap-not-working-linkerd-2-14/445 "2024-04-18T12:06:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![drisbee](https://avatars.discourse-cdn.com/v4/letter/d/77aa72/32.png) [@drisbee](https://linkerd.buoyant.io/u/drisbee)\
**Post date:** [April 18, 2024, 12:06pm UTC](https://linkerd.buoyant.io/t/installed-tap-not-working-linkerd-2-14/445/1 "2024-04-18T12:06:30Z")

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Hi everyone,

After installing linkerd-viz and using the internal prometheus I can see the golden metrics in the dashboard. The issue we are now experiencing is that we can’t use tap.

In the logging of the tap pod I see the following errors:  
2024/04/18 11:35:22 http: TLS handshake error from 172.29.3.0:36613: EOF

Thanks in advance for the help.

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**Author:** ![Alen](https://avatars.discourse-cdn.com/v4/letter/a/9dc877/32.png) [@Alen](https://linkerd.buoyant.io/u/Alen)\
**Post date:** [April 22, 2024, 1:58pm UTC](https://linkerd.buoyant.io/t/installed-tap-not-working-linkerd-2-14/445/2 "2024-04-22T13:58:52Z")

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Looks like an mTLS cert mismatch error between the linkerd-viz components and the data plane proxy you’re trying to tap. Does reloading/restarting the data plane proxy pod have any effect?

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**Author:** ![drisbee](https://avatars.discourse-cdn.com/v4/letter/d/77aa72/32.png) [@drisbee](https://linkerd.buoyant.io/u/drisbee)\
**Post date:** [May 7, 2024, 12:16pm UTC](https://linkerd.buoyant.io/t/installed-tap-not-working-linkerd-2-14/445/3 "2024-05-07T12:16:02Z")

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Thanks for the information. I got it working by following the following link. [Automatically Rotating Control Plane TLS Credentials | Linkerd](https://linkerd.io/2.15/tasks/automatically-rotating-control-plane-tls-credentials/)

I had the certificates in the installation of linkerd hardcoded in the configuration (For experimentation purposes) but did not have them installed when installing Linkerd-viz.