For some reason my CentOS VPS refuses all connections except for HTTP, SSH and Telnet. Whenever I try to connect to a port such as 25 (SMTP) or even a random port such as 225 I get a connection refused error :S netstat -ap shows that the server is listening and iptables is turned off.
However I can interface with the same ports on the server through telnet...
# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination # netstat -an | fgrep LISTEN tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:225 0.0.0.0:* LISTEN tcp 0 0 :::22 :::* LISTEN tcp 0 0 :::80 :::* LISTEN unix 2 [ ACC ] STREAM LISTENING 169786017 /tmp/.font-unix/fs7100 unix 2 [ ACC ] STREAM LISTENING 169786045 /var/run/saslauthd/mux
This is the error message i'm getting from my php script. My PHP script works fine with every other SMTP server I've come across Warning: fsockopen() [function.fsockopen]: unable to connect to :25 (Connection refused)