1, first execute MySQL-h172.115.123.22-udeve-pdeve [-p3306] in linux, indicating that the network problem is that MySQL can't be started or the deve user doesn't have remote access rights. 2. stop iptables firewall Linux shell >:/etc/init.d/iptables stop3. Check whether mysql processes and ports start Linux shell & gtps-efgrep MySQL Linux shell > Netstat -ntl 4, user Linux shell >: MySQL-uroot-pmysql > Select users and hosts from mysql.user; Mysql & gt creates user deve @ "%"identified by "deve"; Mysql & gt grants full permissions on *. * Develop @ "%"; 5. Use telnet to confirm the access to windows cmd>. Remote login172.115.123.22 3306