Googling i foind this cfg lines: acl SSLERR ssl_error X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN sslproxy_cert_error allow SSLERR sslproxy_cert_error deny all The error " certificate verify failed has deissappeared, I refer to this error: routines:CONNECT_CR_CERT:certificate verify failed (1/-1/0) 2018/06/18 08:22:08.825 kid1| 4,3| errorpage.cc(1100) Convert: errorConvert: %%D --> 'Self-signed SSL Certificate in chain: /C=US/O=Apple Inc./OU=Apple Certification Authority/CN=Apple Root CA' But... WhatsApp on iOS devices still not working. So that was not the root cause of the problem. On Android WhatsApp Works fine. Any other idea? Thank You. _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users