linux网页无法连接到服务器,linux – 无法连接到SMTP服务器
我無法從PC連接到SMTP服務器.
我使用Debian sid.
telnet mail.example.com 25
Trying 12.23.34.45...
telnet: Unable to connect to remote host: Connection timed out
來自我網絡外部的另一臺Debian PC:
telnet mail.example.com 25
Trying 12.23.34.45...
Connected to mail.example.com.
Escape character is '^]'.
220 mail.example.com ESMTP Exim 4.63 Mon,02 Apr 2012 22:14:09 +0200
ping也永遠掛起,當我按下Ctrl C時它會說“100%丟包”.
最后,traceroute充滿了星號:
traceroute mail.example.com
traceroute to mail.example.com (12.23.34.45),30 hops max,60 byte packets
1 * * *
2 * * *
3 * * *
...
27 * * *
28 * * *
29 * * *
30 * * *
當我對服務器端口25運行nmap時:
nmap mail.example.com -p25
Starting Nmap 5.21 ( http://nmap.org ) at 2012-04-02 23:08 EEST
Nmap scan report for mail.example.com (12.23.34.45)
Host is up (0.090s latency).
PORT STATE SERVICE
25/tcp filtered smtp
Nmap done: 1 IP address (1 host up) scanned in 0.88 seconds
最后我的iptables:
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
有任何想法嗎?
非常感謝您的幫助.
總結
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