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  1. CK Cheong

    Zimbra : Version 8.8.5 (with proxy and memcached)

    If I do not restart zimbra services at least once a day (zmcontrol restart), I will get this error msg next day in zimbra.log. All email clients will prompt for username and password when this happen.

    Apr 14 14:49:46 mail saslauthd[9937]: authentication against url ‘https://mail.domain.com:7073/service/admin/soap/’ caused error “curl_easy_perform: error(28): Operation timed out after 15000 milliseconds with 0 out of 0 bytes received”.

    Some online articles commented due to the old version of Curl. I have upgraded curl version to the latest version but till no luck.

    curl 7.59.0 (x86_64-redhat-linux-gnu) libcurl/7.59.0 NSS/3.28.4 zlib/1.2.7 libpsl/0.7.0 (+libicu/50.1.2) libssh2/1.8.0 nghttp2/1.21.1
    Release-Date: 2018-03-14
    Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
    Features: AsynchDNS IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz HTTP2 UnixSockets HTTPS-proxy PSL Metalink

    Some said due to the GoogleDNS, I have changed the resolv.conf NOT pointing to GoogleDNS, but still not luck.

    https://www.digitalocean.com/community/questions/how-to-solve-curl-error-28-resolving-timed-out-after-10518-milliseconds

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