I've just installed Centos 4 on an Acer G310 server - everything's gone well except I'm not able to SMTP connect to my upstream mail server (I've installed postfix + MailScanner) - I managed to find sort out the dovecot side of things but SMTP remains quite silent - the maillog shows an attempted connect but then a timeout: May 9 13:08:45 woking postfix/smtp[7895]: deliver_request_final: send: "connect to mailhost.zen.co.uk[212.23.3.98]: Connection timed out" -1 If I connect manually (telnet mailhost.zen.co.uk 25) nothing happens - no response is shown and I presume if I left things for long enough I'd see a timeout message? Here's the output from netstat -pant: Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:32769 0.0.0.0:* LISTEN 2048/rpc.statd tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 2028/portmap tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 2242/vsftpd tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 2181/cupsd tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 5201/master tcp 0 1 192.168.101.11:32847 212.23.3.98:25 SYN_SENT 7930/telnet tcp 0 0 :::993 :::* LISTEN 3416/dovecot tcp 0 0 :::995 :::* LISTEN 3416/dovecot tcp 0 0 :::110 :::* LISTEN 3416/dovecot tcp 0 0 :::143 :::* LISTEN 3416/dovecot tcp 0 0 :::80 :::* LISTEN 2345/httpd tcp 0 0 :::22 :::* LISTEN 2217/sshd tcp 0 0 :::25 :::* LISTEN 5201/master tcp 0 0 :::443 :::* LISTEN 2345/httpd tcp 0 0 ::ffff:192.168.101.11:22 ::ffff:192.168.101.20:4450 ESTABLISHED 3319/0 tcp 0 192 ::ffff:192.168.101.11:22 ::ffff:192.168.101.20:4758 ESTABLISHED 5724/1 I notice that there's an attempt to make a connection but that's it - any ideas what might be causing this - I'm not running a server-based firewall. Over to you with thanks. Nigel
Nigel Kendrick wrote:>I've just installed Centos 4 on an Acer G310 server - everything's gone well >except I'm not able to SMTP connect to my upstream mail server (I've >installed postfix + MailScanner) - I managed to find sort out the dovecot >side of things but SMTP remains quite silent - the maillog shows an >attempted connect but then a timeout: > >May 9 13:08:45 woking postfix/smtp[7895]: deliver_request_final: send: >"connect to mailhost.zen.co.uk[212.23.3.98]: Connection timed out" -1 > >If I connect manually (telnet mailhost.zen.co.uk 25) nothing happens - no >response is shown and I presume if I left things for long enough I'd see a >timeout message? Here's the output from netstat -pant: > > >Do you have the firewall turned on and filtering port 25? If you can't telnet to the remote host port manually then you're getting filtered either on your host or on the remote host. Cheers, C