I have a website with verified SSL. Everything is ok except one thing. In our country there is a mobile internet provider whose clients can't access our website. When they try to access my website through their mobile network, they can't. After their report I tried it myself, and same result. FTP, :80, SSL 10000 ports are OK. But only SSL 443 gives timeout. No access to my server. I have checked server logs, and found no log entries from those IP-s, so it means that their request doesn't reach my server. Just timeout after some seconds trying. I contacted the mobile provider's support, they investigated and assured me that they haven't blocked any port or hostname for my dedicated server. And one more strange fact: only 60-70% their clients can't connect to my ssl website, other 30-40% connect without any trouble. Is there any way to find the real reason of problem? telnet, ping, traceroute, dns and network structure checking didn't give any result. If the problem lies in the mobile provider's network, I have to prove it to them, else they reject their fault and advise me to check my server structure again.