Iptables makes the security settings, first discards all INPUT and OUTPUT directions, and then enables the ports to be used one by one. it is found that the software cannot be installed using yum, make sure that the following rules are available in/etc/sysconfig/iptables: # iptables-AINPUT-mstate -- stateESTABLISHED, RELATED-jACCE
IptablesAfter the security settings are completed, discard all INPUT and OUTPUT directions first, enable the ports to be used one by one, and find that the software cannot be installed using yum. Finally, you need to query the information in/etc/sysconfig/
IptablesMake sure there are the following rules
# Iptables-a input-m state -- state ESTABLISHED, RELATED-jACCEPT
# Iptables-a output-m state -- state ESTABLISHED, RELATED-jACCEPT
# Iptables-a output-p tcp-m state -- state NEW -- dport80-j ACCEPT
Finally, run: # iptables-save>/etc/sysconfig/iptables to save
#/Etc/rc. d/init. d/iptables restart to reload and test yum.
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