[GTALUG] Connection Refused

[William Park]

Port 25 is matched by 'fail2ban-dovecot' and 'fail2ban-postfix' which do
nothing.  So, check postfix main config.
-- 
William

On Thu, Feb 19, 2015 at 10:59:01PM -0500, Randy Jonasz wrote:
> Hello,
> 
> I have an ubuntu 14.04 server running postfix.  I wanted to test it with
> telnet on port 25.  Alas I receive connection refused errors although I
> can ssh to the server fine and see that master is listening on port 25.
> I ssh'd to another machine outside of my lan and tried telnet from
> there.  I was able to connect fine.  Does anyone have any suggestions
> how I can troubleshoot this? My hosts.deny file is empty.
> 
> Here's the server's iptables -L output.  My wan address is not listed.
> Thanks for your help!
> 
> Randy
> 
> root at foucault:/etc/postfix# iptables -L
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination         
> fail2ban-ErrorAccess  tcp  --  anywhere             anywhere
> multiport dports http,https
> fail2ban-ReqLimit  tcp  --  anywhere             anywhere
> multiport dports http,https
> fail2ban-dovecot  tcp  --  anywhere             anywhere
> multiport dports smtp,urd,submission,imap2,imap3,imaps,pop3,pop3s
> fail2ban-postfix  tcp  --  anywhere             anywhere
> multiport dports smtp,urd,submission
> fail2ban-ssh-ddos  tcp  --  anywhere             anywhere
> multiport dports ssh
> fail2ban-ssh  tcp  --  anywhere             anywhere
> multiport dports ssh
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination         
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination         
> 
> Chain fail2ban-ErrorAccess (1 references)
> target     prot opt source               destination         
> RETURN     all  --  anywhere             anywhere            
> 
> Chain fail2ban-ReqLimit (1 references)
> target     prot opt source               destination         
> REJECT     all  --  hosted-by.sistem724.com.tr  anywhere
> reject-with icmp-port-unreachable
> RETURN     all  --  anywhere             anywhere            
> 
> Chain fail2ban-dovecot (1 references)
> target     prot opt source               destination         
> RETURN     all  --  anywhere             anywhere            
> 
> Chain fail2ban-postfix (1 references)
> target     prot opt source               destination         
> RETURN     all  --  anywhere             anywhere            
> 
> Chain fail2ban-ssh (1 references)
> target     prot opt source               destination         
> REJECT     all  --  www.albena.bg        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  182.100.67.115       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  dynamicip-188-232-146-41.pppoe.omsk.ertelecom.ru
> anywhere             reject-with icmp-port-unreachable
> REJECT     all  --  outgoing-auas.carlson.com  anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  221.233.125.180      anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  2h56.xjtu.edu.cn     anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  vps3d196-static.vdrs.net  anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  static.vdc.vn        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  grupoazul130.static.host.gvt.net.br  anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  182.100.67.114       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  luna933.server4you.de  anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  115.231.222.45       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  115.239.228.7        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  115.239.228.15       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  static.vdc.vn        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  218.205.48.105       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  115.239.228.4        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  5-14-20-84.residential.rdsnet.ro  anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  94.102.53.182        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  dynamic.vdc.vn       anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  59.57.253.94         anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  115.239.228.9        anywhere
> reject-with icmp-port-unreachable
> REJECT     all  --  183.136.216.4        anywhere
> reject-with icmp-port-unreachable
> RETURN     all  --  anywhere             anywhere 
> 
> ---
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