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CentOS 7 firewall nat

開啟ip forward vi /etc/sysctl.conf net.ipv4.ip_forward = 1 sysctl -p 增加firewall policy firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -o eth_ext -j MASQUERADE firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -i eth_int -o eth_ext -j ACCEPT firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -i eth_ext -o eth_int -m state --state RELATED,ESTABLISHED -j ACCEPT firewall-cmd --runtime-to-permanent
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CactiEZ Default Login Information

To login to the OS (you will want to change this) user: root pass: CactiEZ To login to cacti (it prompts to change this) user: admin pass: admin Get to webmin at (requires the root user / pass) https://serverip:10000/ To configure ntop (you will want to change this) user: admin pass: CactiEZ To configure nagios user: nagiosadmin pass: CactiEZ #vi /etc/sysconfig/clock # 修改 ZONE="Asia/Taipei"
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解決在Hyper-V安裝CentOS5.4遠端桌面滑鼠不能動的問題

01# 設定網路(在Hyper-V設定用"傳統網路介面卡") 02# yum install kernel-devel gcc 03# rm /lib/modules/2.6.18-164.el5/build (目錄有可能會不一樣) 04# ln -s /usr/src/kernels/2.6.18-164.15.1.el5-x86_64/ /lib/modules/2.6.18-164.el5/build 05# 放光碟 06# cp -rp /media/driver /opt (目錄不一定是"/media/driver",可用mount指令查) 07# cd /opt/driver/LinuxICv2 08# ./setup.pl drivers 09# cd /opt/driver/inputvsc 10# ./setup.pl inputdriver
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CentOS Yum Repo

輸入以下指令安裝rpmforge, epel, remi的yum repo rpm -Uvh http://apt.sw.be/redhat/el5/en/i386/RPMS.dag/rpmforge-release-0.3.6-1.el5.rf.i386.rpm rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm rpm -Uvh http://rpms.famillecollet.com/el5.i386/remi-release-5-7.el5.remi.noarch.rpm 安裝完用以下指令檢查更新 yum --enablerepo=remi check-update
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CentOS環境設定

修改開機為文字模式 vi /etc/inittab id:3:initdefault: 更改hostname vi /etc/hosts vi /etc/sysconfig/network hostname fw 限制root不能用ssh登入 vi /etc/ssh/sshd_config PermitRootLogin no 最後一行加入 AllowUsers username 重新啟動sshd service sshd restart 限制來源IP使用ssh vi /etc/hosts.deny sshd: ALL 僅允許 192.168.1.* 與 1.2.3.4 連線 vi /etc/hosts.allow sshd: 192.168.1 1.2.3.4 限制只有特定user可以su vi /etc/pam.d/su 把以下此行前面的#號刪掉 auth required pam_wheel.so use_uid 把想要可以su的帳號加入wheel群組 usermod -G wheel username
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