EL7 ssh连接慢解决方法

egrep ‘GSSAPIAuthentication|UseDNS’ /etc/ssh/sshd_config

cp -pr /etc/ssh/sshd_config /etc/ssh/sshd_config-$(date +%F)
sed -i ‘s/GSSAPIAuthentication yes/GSSAPIAuthentication no/g’ /etc/ssh/sshd_config
sed -i ‘s/#UseDNS yes/UseDNS no/g’ /etc/ssh/sshd_config

egrep ‘GSSAPIAuthentication|UseDNS’ /etc/ssh/sshd_config

systemctl restart sshd