1. 今天在客户端连接Oracle服务端时报：ORA-12560: TNS: 协议适配器错误的解决方法
但在服务端监听是打开的
[oracle@asm ~]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 21-APR-2014 16:30:35 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=asm)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 21-APR-2014 16:22:21 Uptime 0 days 0 hr. 8 min. 14 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/product/db/network/admin/listener.ora Listener Log File /u01/app/diag/tnslsnr/asm/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=asm)(PORT=1521))) Services Summary... Service "+ASM" has 1 instance(s). Instance "+ASM", status READY, has 1 handler(s) for this service... Service "Oracle8" has 1 instance(s). Instance "ORCL", status UNKNOWN, has 1 handler(s) for this service... Service "orcl" has 1 instance(s). Instance "orcl", status READY, has 1 handler(s) for this service... Service "orclXDB" has 1 instance(s). Instance "orcl", status READY, has 1 handler(s) for this service... The command completed successfully
而后检查一下Centos5.8的防火墙
[root@asm ~]# /etc/init.d/iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination 1 RH-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0 Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 RH-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0 Chain OUTPUT (policy ACCEPT) num target prot opt source destination Chain RH-Firewall-1-INPUT (2 references) num target prot opt source destination 1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 255 3 ACCEPT esp -- 0.0.0.0/0 0.0.0.0/0 4 ACCEPT ah -- 0.0.0.0/0 0.0.0.0/0 5 ACCEPT udp -- 0.0.0.0/0 224.0.0.251 udp dpt:5353 6 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:631 7 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:631 8 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 9 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 10 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
发现防火墙是打开的，关闭防火墙
[root@asm ~]# /etc/init.d/iptables stop Flushing firewall rules: [ OK ] Setting chains to policy ACCEPT: filter [ OK ] Unloading iptables modules: [ OK ] [root@asm ~]# chkconfig iptables off
而后客户端连接服务端正常
