I managed to sucessfuly install ISPconfig on CentOS 5.1, using this tutorial http://www.howtoforge.com/centos-5.1-server-lamp-email-dns-ftp-ispconfig installations was OK no errors etc. But when I try to get to admin (I use firefox) I get this error: https://192.168.1.11:81/ my host is like tutorial: server1 Could not establish encrypted connection because certificate presented by 192.168.1.11 has an invalid signature My setting for ISPconfig: Please enter your MySQL server: localhost or I shoud have entered server1? Please enter your MySQL user: root Please enter your MySQL password: <MySQLpassword> Please enter a name for the ISPConfig database: db_ispconfig Please enter the IP address of the ISPConfig web: 192.168.1.11 Please enter the host name: server1 or I shoud have entered www? Please enter the domain: somemydomain.com Please select the protocol (http or https (SSL encryption)) to use to access the ISPConfig system: 1 If I enter http://192.168.1.11:81/ I get: Hint: https://server1.somemydomain.com:81/ But if click the link I get page unavailable error: You tried to access the address https://server1.somemydomain.com:81/, which is currently unavailable. Please make sure that the Web address (URL) is correctly spelled and punctuated, then try reloading the page Here is what I entered during ISPconfig install script: Code: wget http://internap.dl.sourceforge.net/sourceforge/ispconfig/ISPConfig-2.2.19.tar.gz tar xvfz ISPConfig-2.2.19.tar.gz cd install_ispconfig ./setup Step0 RSA Step2 1.Country Name: LT 2. State or Province Name: . 3. Locality Name: . 4. Organization Name: . 5. Organizational Unit Name: . 6. Common Name (eg, CA name): . 7. Email Address (eg, name@FQDN): . 8. Certificate Validity: 365 Step3 3 Step5 1.Country Name: LT 2. State or Province Name: . 3. Locality Name: . 4. Organization Name: . 5. Organizational Unit Name: . 6. Common Name (eg, CA name): . 7. Email Address (eg, name@FQDN): . 8. Certificate Validity: 365 Step6 3 Step7 n Step8 n ------------------ Enter postmaster address: firstname.lastname@example.org host name: server1 domain: somemydomain.com HTTPS choose for yes 1 What is wrong? Why secure connection will not work? and I can't access ISPconfig admin panel?