Grant, squid proxy on a Mac Address

• Edit the squid configuration file is usually located in "/ etc / squid.conf"
  
• Then input the command line below

acl macrule arp "/path/to/mac-list/maclist"
http_access allow macrule #allow/deny

• Create a file its list of mac address

touch /path/to/mac-list/maclist

• Enter the list of his mac address

echo "00:C0:26:2A:8E:8D" >> /path/to/mac-list/maclist

• Reload squid
  

service squid reload

Install VPN with PPTPD in cenots / RHEL 5

VPN (Virtual Provate Network) is a computer network that allows someone into a different local network. This time I tried to install vpn using pptp and with os Centos / RHEL 5.
Installation PPTPD

1. Install the Yum Repositories

rpm -Uvh http://pptpclient.sourceforge.net/yum/stable/rhel5/pptp-release-current.noarch.rpm

2. Then proceed with installing ppp & pptpd

yum install ppp
yum --enablerepo=pptp-stable install pptp

3. After installation finnish open /etc/pptpd.conf and change the configuration for localip & remoteip

localip 10.0.0.2
remoteip 10.0.0.200-220

4. After that open the file / etc / ppp / options.pptpd and change sesuia ms-dns dns server / isp you (I filled in with open dns ip)

ms-dns 208.67.222.222
ms-dns 208.67.220.220

5. Then make your VPN use

echo "username pptpd password *">> / etc / ppp / chap-secrets

IP Forwarding & Nat
1. Set IPForward

echo 1 > /proc/sys/net/ipv4/ip_forward

2. Set Nat

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Start PPTPD

service pptpd start