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9

CentOS 6 comes with Postfix as default mail server and you can see it running (tcp :25 1186/master). Try to stop Postfix (service postfix stop) and then start sendmail (service sendmail start).


5

Nothing is blocking port 80. You just have firewall NAT rules which are redirecting connections to that port to other ports, which aren't open. Chain PREROUTING (policy ACCEPT 1 packets, 40 bytes) pkts bytes target prot opt in out source destination 0 0 REDIRECT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 ...


1

If you want to just test if you can use the port, use Netcat: On your server nc -l 0.0.0.0 8283 Note: The -l switch instructs netcat to listen to port 8080. On your client telnet 1.2.3.4 8283 or nc 1.2.3.4 8283


1

Your localhost parameter to the -S option is telling PHP to only listen to localhost, or 127.0.0.1. If you want it available externally, you need to use either the external IP address / hostname or "0.0.0.0", though a quick read through the manual page doesn't explicitly indicate 0.0.0.0 will work.



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