# ERROR contact:service ping satellite failed. tls peer certificate verification error: not signed by any CA in the whitelist: CA cert **URL:** \ **Category:** troubleshooting\ **Tags:** authorization-token, identity, offline\ **Created:** [February 20, 2021, 10:06pm UTC](https://forum.storj.io/t/error-contact-service-ping-satellite-failed-tls-peer-certificate-verification-error-not-signed-by-any-ca-in-the-whitelist-ca-cert/11901 "2021-02-20T22:06:33Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Alexey](https://storj.bcdn.literatehosting.com/user_avatar/forum.storj.io/alexey/32/41_2.png) [@Alexey](https://forum.storj.io/u/Alexey)\ **Post date:** [February 21, 2021, 12:45am UTC](https://forum.storj.io/t/error-contact-service-ping-satellite-failed-tls-peer-certificate-verification-error-not-signed-by-any-ca-in-the-whitelist-ca-cert/11901/2 "2021-02-21T00:45:47Z")
Please troubleshoot your offline issue with this checklist: > [@My Node is OFFLINE for 2 hours](https://forum.storj.io/t/my-node-is-offline-for-2-hours/736/2): > > It should connect in seconds. There are a few things you should check. Start with checking the port. On [https://www.yougetsignal.com/tools/open-ports/?port=28967](https://www.yougetsignal.com/tools/open-ports/?port=28967) you can fill in the domain or IP you are using in the run command. Then check the port. If it’s closed, it could still be several things. Make sure the WAN IP you see in your router settings matches the IP shown on the above page. Make sure your port forward is set up correctly. That means no filter on incoming IPs, forwarding to th… --- _[View the full topic](https://forum.storj.io/t/error-contact-service-ping-satellite-failed-tls-peer-certificate-verification-error-not-signed-by-any-ca-in-the-whitelist-ca-cert/11901)._