Download the RPM Package 1. wget Click This Link Install the RPM package 2. rpm -ivh pptpd-1.3.4-1.rhel5.1.i386.rpm Make a Backup options.pptpd 3. cp /etc/ppp/options.pptpd /etc/ppp/options.pptpd.bak Edit th options.pptpd file 4. vim /etc/ppp/options.pptpd Enter the following: name pptpd refuse-pap refuse-chap refuse-mschap require-mschap-v2 require-mppe-128 proxyarp lock nobsdcomp novj novjccomp nologfd ms-dns 202.84.64.38 ms-dns 202.84.64.38 Make a Backup Chap-secrets and Edit the file 5. cp /etc/ppp/chap-secrets /etc/ppp/chap-secrets.bak 6. vi /etc/ppp/chap-secrets # Secrets for authentication using CHAP # client server secret IP addresses ####### redhat-config-network will overwrite this part!!! (begin) ########## ####### redhat-config-network will overwrite this part!!! (end) ############ nayeem pptpd nayeem 10.10.10.100 rony pptpd rony 10.10.10.101 Make a backup pptpd.conf and Edit 7. cp /etc/pptpd.conf /etc/pptpd.conf.bak 8. vim /etc/pptpd.conf option / etc / ppp / options.pptpd logwtmp localip 192.168.9.1 remoteip 192.168.9.11-30 9. /etc/init.d/pptpd start 10. /etc/init.d/pptpd restart 11. Add the following rules in iptables iptables -A INPUT -p gre -j ACCEPT iptables -A OUTPUT -p gre -j ACCEPT iptables -A INPUT -p tcp --sport 1723 -s 192.168.50.20 -j ACCEPT iptables -A OUTPUT -p tcp --dport 1723 -d 192.168.50.20 -j ACCEPT [Here 192.168.50.20 is WAN side IP]