昨天公司的服务器升级硬件，只升级了CPU和 内存，然后重启过后，线上运行的东西就运行不了，查了一下，所有端口和服务有没有开放，防火墙那些，结果发现端口和服务，防火墙允许的端口都开了
还是运行不了，带到晚上１０点，突然有一个哥们说了一句，要不把防火墙关了试一下，结果就好了，忘了查看防火墙信息
目前我们只用到了的端口是
cat: /etc/sysconfig/iptables: Permission denied
[dev@chttl-8a6e210a8d27536a ~]$ sudo cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT-A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 27017 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
只有这些，
结果后面查了一下防火墙信息发现还ＴＭ用到了smb 这个我真的就搞不明白了
ack)
Jul 17 09:08:32 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 09:21:32 chttl-8a6e210a8d27536a smbd[28014]: [2015/07/17 09:21:32.803089, 0] printing/print_cups.c:151(cups_connect)
Jul 17 09:21:32 chttl-8a6e210a8d27536a smbd[28014]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 09:21:32 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 09:21:32.803424, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 09:21:32 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 09:34:33 chttl-8a6e210a8d27536a smbd[31824]: [2015/07/17 09:34:33.385856, 0] printing/print_cups.c:151(cups_connect)
Jul 17 09:34:33 chttl-8a6e210a8d27536a smbd[31824]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 09:34:33 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 09:34:33.386165, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 09:34:33 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 09:47:34 chttl-8a6e210a8d27536a smbd[3272]: [2015/07/17 09:47:34.017469, 0] printing/print_cups.c:151(cups_connect)
Jul 17 09:47:34 chttl-8a6e210a8d27536a smbd[3272]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 09:47:34 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 09:47:34.017824, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 09:47:34 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 10:00:34 chttl-8a6e210a8d27536a smbd[7256]: [2015/07/17 10:00:34.651162, 0] printing/print_cups.c:151(cups_connect)
Jul 17 10:00:34 chttl-8a6e210a8d27536a smbd[7256]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 10:00:34 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 10:00:34.651720, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 10:00:34 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 10:13:35 chttl-8a6e210a8d27536a smbd[11582]: [2015/07/17 10:13:35.362361, 0] printing/print_cups.c:151(cups_connect)
Jul 17 10:13:35 chttl-8a6e210a8d27536a smbd[11582]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 10:13:35 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 10:13:35.362682, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 10:13:35 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 10:26:35 chttl-8a6e210a8d27536a smbd[15564]: [2015/07/17 10:26:35.823554, 0] printing/print_cups.c:151(cups_connect)
Jul 17 10:26:35 chttl-8a6e210a8d27536a smbd[15564]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 10:26:35 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 10:26:35.823862, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 10:26:35 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
Jul 17 10:39:36 chttl-8a6e210a8d27536a smbd[19370]: [2015/07/17 10:39:36.439927, 0] printing/print_cups.c:151(cups_connect)
Jul 17 10:39:36 chttl-8a6e210a8d27536a smbd[19370]: Unable to connect to CUPS server localhost:631 - Connection refused
Jul 17 10:39:36 chttl-8a6e210a8d27536a smbd[1567]: [2015/07/17 10:39:36.440280, 0] printing/print_cups.c:528(cups_async_callback)
Jul 17 10:39:36 chttl-8a6e210a8d27536a smbd[1567]: failed to retrieve printer list: NT_STATUS_UNSUCCESSFUL
始终就没有明白这个631这个端口是搞什么的
查了一下是
samba服务器Unable to connect to CUPS server localhost:631 – 拒绝连接
这个就坑到家了本来，我就没有用samba 这个的，后来想了一下，应该是亚马迅云服务器可能用到了，所以导致的问题
总结，最后还是多看日志，看了一下apache 日志 php 日志，就是忘了看防火墙日志.原本以为我想要的端口都是开的，结果，还是错了，永远都不要以为以为，要去实际做了