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

Squid proxy authentication with ncsa_auth

ncsa_auth is a function of the squid in the squid to perform authentication by using the NCSA / Apache httpd-style password. The first thing to do is be in mengistal squid and configuration. If the installation process is complete then the squid suah do in addition to its configuration file. Phase ² which needs to be done is:

• Make ncsa_auth user
  # htpasswd /etc/squid/passwd user1
  
  Results will be like this:
  
  New password:
  Re-type new password:
  Adding password for user user1
• Make sure squid can read the file
  # chmod o+r /etc/squid/passwd
• Add Squid configuration
  # vi /etc/squid/squid.conf
  
  Then enter this in the squid.conf configuration
  
  auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd
  auth_param basic children 5
  auth_param basic realm Squid proxy-caching web server
  auth_param basic credentialsttl 2 hours
  auth_param basic casesensitive off
• Also add the command below
  
  acl ncsa_users proxy_auth REQUIRED
  http_access allow ncsa_users
• Then Restart squid
  
  # /etc/init.d/squid restart