How to configure device to trust root certificate when using a SOCKS5 proxy?

I am routing a Linux machine through a SOCKS5 proxy. The internet works as expected and I am presented with the proxy's IP when viewing http://whatismyip.com . However, some sites are reporting that I am experiencing a MITM attack: > Software is Preventing Firefox From Safely Connecting to This Site > > www.mozilla.org is most likely a safe site, but a secure connection > could not be established. This issue is caused by DigiCert Global Root > CA, which is either software on your computer or your network. > > What can you do about it? > > www.mozilla.org has a security policy called HTTP Strict Transport > Security (HSTS), which means that Firefox can only connect to it > securely. You can’t add an exception to visit this site. > > If your antivirus software includes a feature that scans encrypted connections (often called “web scanning” or “https scanning”), you can > disable that feature. If that doesn’t work, you can remove and > reinstall the antivirus software. > * If you are on a corporate network, you can contact your IT department. > * If you are not familiar with DigiCert Global Root CA, then this could be an attack, and there is nothing you can do to access the > site. https://www.mozilla.org/firefox/new/?utm_medium=referral&utm_source=support.mozilla.org Your connection is being intercepted by a TLS proxy. Uninstall it if possible or configure your device to trust its root certificate. HTTP Strict Transport Security: true HTTP Public Key Pinning: false Certificate chain: -----BEGIN CERTIFICATE----- MIIGRjCCBS6gAwIBAgIQDJduPkI49CDWPd+G7+u6kDANBgkqhkiG9w0BAQsFADBN MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5E aWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTgxMTA1MDAwMDAwWhcN MTkxMTEzMTIwMDAwWjCBgzELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3Ju aWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxHDAaBgNVBAoTE01vemlsbGEgQ29y cG9yYXRpb24xDzANBgNVBAsTBldlYk9wczEYMBYGA1UEAxMPd3d3Lm1vemlsbGEu b3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKruymkkmkqCJh7Q jmXlUOBcLFRyw5LG/vUUWVrsxC2gsbR8WJq+cYoYBpoNVStKrO4U2rBh1GEbccvT 6qKOQI+pjjDxx9cmRdubGTGp8L0MF1ohVvhIvYLumOEoRDDPU4PvGJjGhek/ojve dPWe8dhciHkxOC2qPFZvVFMwg1/o/b80147BwZQmzB18mnHsmcyKlpsCN8pxw86u ao9Iun8gZQrsllW64rTZlRR56pHdAcuGAoZjYZxwS9Z+lvrSjEgrddemWyGGalqy Fp1rXlVM1Tf4/IYWAQXTgTUN303u3xMjss7QK7eUDsACRxiWPLW9XQDd1c+yvaYJ KzgJ2wIDAQABo4IC6TCCAuUwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG 2eIwHQYDVR0OBBYEFNpSvSGcN2VT/B9TdQ8eXwebo60/MCcGA1UdEQQgMB6CD3d3 dy5tb3ppbGxhLm9yZ4ILbW96aWxsYS5vcmcwDgYDVR0PAQH/BAQDAgWgMB0GA1Ud JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjBrBgNVHR8EZDBiMC+gLaArhilodHRw Oi8vY3JsMy5kaWdpY2VydC5jb20vc3NjYS1zaGEyLWc2LmNybDAvoC2gK4YpaHR0 cDovL2NybDQuZGlnaWNlcnQuY29tL3NzY2Etc2hhMi1nNi5jcmwwTAYDVR0gBEUw QzA3BglghkgBhv1sAQEwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNl cnQuY29tL0NQUzAIBgZngQwBAgIwfAYIKwYBBQUHAQEEcDBuMCQGCCsGAQUFBzAB hhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wRgYIKwYBBQUHMAKGOmh0dHA6Ly9j YWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJTZWN1cmVTZXJ2ZXJDQS5j cnQwDAYDVR0TAQH/BAIwADCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1AKS5CZC0 GFgUh7sTosxncAo8NZgE+RvfuON3zQ7IDdwQAAABZuYWiHwAAAQDAEYwRAIgZnMS H1JdG6NASHWTwD0mlP/zbr0hzP263c02Ym0DU64CIEe4QHJDP47j0b6oTFu6RrZz 1NQ9cq8Az1KnMKRuaFAlAHUAh3W/51l8+IxDmV+9827/Vo1HVjb/SrVgwbTq/16g gw8AAAFm5haJAgAABAMARjBEAiAxGLXkUaOAkZhXNeNR3pWyahZeKmSaMXadgu18 SfK1ZAIgKtwu5eGxK76rgaszLCZ9edBIjuU0DKorzPUuxUXFY0QwDQYJKoZIhvcN AQELBQADggEBAKLJAFO3wuaP5MM/ed1lhk5Uc2aDokhcM7XyvdhEKSHbgPhcgMoT 9YIVoPa70gNC6KHcwoXu0g8wt7X6Vm1ql/68G5q844kFuC6JPl4LVT9mciD+VW6b HUSXD9xifL9DqdJ0Ic0SllTlM+oq5aAeOxUQGXhXIqj6fSQv9fQN6mXxQIoc/gjx teskq/Vl8YmY1FIZP9Bh7g27kxZ9GAAGQtjTL03RzKAuSg6yeImYVdQWasc7UPnB XlRAzZ8+OJThUbzK16a2CI3Rg4agKSJk+uA47h1/ImmngpFLRb/MvRX6H1oWcUuy H6O7PZdl0YpwTpw1THIuqCGl/wpPgyQgcTM= -----END CERTIFICATE----- -----BEGIN CERTIFICATE----- MIIElDCCA3ygAwIBAgIQAf2j627KdciIQ4tyS8+8kTANBgkqhkiG9w0BAQsFADBh MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3 d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD QTAeFw0xMzAzMDgxMjAwMDBaFw0yMzAzMDgxMjAwMDBaME0xCzAJBgNVBAYTAlVT MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxJzAlBgNVBAMTHkRpZ2lDZXJ0IFNIQTIg U2VjdXJlIFNlcnZlciBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB ANyuWJBNwcQwFZA1W248ghX1LFy949v/cUP6ZCWA1O4Yok3wZtAKc24RmDYXZK83 nf36QYSvx6+M/hpzTc8zl5CilodTgyu5pnVILR1WN3vaMTIa16yrBvSqXUu3R0bd KpPDkC55gIDvEwRqFDu1m5K+wgdlTvza/P96rtxcflUxDOg5B6TXvi/TC2rSsd9f /ld0Uzs1gN2ujkSYs58O09rg1/RrKatEp0tYhG2SS4HD2nOLEpdIkARFdRrdNzGX kujNVA075ME/OV4uuPNcfhCOhkEAjUVmR7ChZc6gqikJTvOX6+guqw9ypzAO+sf0 /RR3w6RbKFfCs/mC/bdFWJsCAwEAAaOCAVowggFWMBIGA1UdEwEB/wQIMAYBAf8C AQAwDgYDVR0PAQH/BAQDAgGGMDQGCCsGAQUFBwEBBCgwJjAkBggrBgEFBQcwAYYY aHR0cDovL29jc3AuZGlnaWNlcnQuY29tMHsGA1UdHwR0MHIwN6A1oDOGMWh0dHA6 Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RDQS5jcmwwN6A1 oDOGMWh0dHA6Ly9jcmw0LmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RD QS5jcmwwPQYDVR0gBDYwNDAyBgRVHSAAMCowKAYIKwYBBQUHAgEWHGh0dHBzOi8v d3d3LmRpZ2ljZXJ0LmNvbS9DUFMwHQYDVR0OBBYEFA+AYRyCMWHVLyjnjUY4tCzh xtniMB8GA1UdIwQYMBaAFAPeUDVW0Uy7ZvCj4hsbw5eyPdFVMA0GCSqGSIb3DQEB CwUAA4IBAQAjPt9L0jFCpbZ+QlwaRMxp0Wi0XUvgBCFsS+JtzLHgl4+mUwnNqipl 5TlPHoOlblyYoiQm5vuh7ZPHLgLGTUq/sELfeNqzqPlt/yGFUzZgTHbO7Djc1lGA 8MXW5dRNJ2Srm8c+cftIl7gzbckTB+6WohsYFfZcTEDts8Ls/3HB40f/1LkAtDdC 2iDJ6m6K7hQGrn2iWZiIqBtvLfTyyRRfJs8sjX7tN8Cp1Tm5gr8ZDOo0rwAhaPit c+LJMto4JQtV05od8GiG7S5BNO98pVAdvzr508EIDObtHopYJeS4d60tbvVS3bR0 j6tJLp07kzQoH3jOlOrHvdPJbRzeXDLz -----END CERTIFICATE----- How do I alleviate this error so that I can access these sites? Do I need to accept some certificate on my local machine or on the proxy?