DHCP & Mail Server

Readme.md

Setup

git clone https://gist.github.com/dufferzafar/e7328e12332a75951c36 lul-lab

sudo bash mail.sh

Test sending/recieving mail.

sudo bash dhcp.sh

Come early tomorrow, to test out DHCP.

Mail Screenshots

http://i.imgur.com/RyohccX.png

http://i.imgur.com/4LLfCpf.png

http://i.imgur.com/4pZqO3O.png

http://i.imgur.com/Pb3Ljs5.png

http://i.imgur.com/Y4K4SB7.png

dhcp.sh

if [ $(id -u) != 0 ]
    then
    echo -e "This script must be run as root user . \nGo back and try again as root user"
    exit 1
fi

# sudo apt-get update
apt-get -y --force-yes install isc-dhcp-server

cp -f dhcpd.conf /etc/dhcp/dhcpd.conf
cp -f isc-dhcp-server /etc/dhcp/isc-dhcp-server

service isc-dhcp-server restart

echo "Configurative changes made."
echo "You need a LAN cable for further steps!"

dhcpd.conf

#
# Sample configuration file for ISC dhcpd for Debian
#
# Attention: If /etc/ltsp/dhcpd.conf exists, that will be used as
# configuration file instead of this file.
#
#

# The ddns-updates-style parameter controls whether or not the server will
# attempt to do a DNS update when a lease is confirmed. We default to the
# behavior of the version 2 packages ('none', since DHCP v2 didn't
# have support for DDNS.)
ddns-update-style none;

# option definitions common to all supported networks...
option domain-name "example.org";
option domain-name-servers ns1.example.org, ns2.example.org;

default-lease-time 600;
max-lease-time 7200;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;

# No service will be given on this subnet, but declaring it helps the 
# DHCP server to understand the network topology.

#subnet 10.152.187.0 netmask 255.255.255.0 {
#}

# This is a very basic subnet declaration.

#subnet 10.254.239.0 netmask 255.255.255.224 {
#  range 10.254.239.10 10.254.239.20;
#  option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
#}

# This declaration allows BOOTP clients to get dynamic addresses,
# which we don't really recommend.

#subnet 10.254.239.32 netmask 255.255.255.224 {
#  range dynamic-bootp 10.254.239.40 10.254.239.60;
#  option broadcast-address 10.254.239.31;
#  option routers rtr-239-32-1.example.org;
#}

# A slightly different configuration for an internal subnet.
subnet 192.168.2.0 netmask 255.255.255.0 {
  range 192.168.2.40 192.168.2.50;
  option domain-name-servers 192.168.2.1;
  option domain-name "internal.example.org";
  option routers 192.168.2.254;
  option broadcast-address 192.168.2.255;
  default-lease-time 60;
  max-lease-time 70;
}

# Hosts which require special configuration options can be listed in
# host statements.   If no address is specified, the address will be
# allocated dynamically (if possible), but the host-specific information
# will still come from the host declaration.

#host passacaglia {
#  hardware ethernet 0:0:c0:5d:bd:95;
#  filename "vmunix.passacaglia";
#  server-name "toccata.fugue.com";
#}

# Fixed IP addresses can also be specified for hosts.   These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP.   Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.
#host fantasia {
#  hardware ethernet 08:00:07:26:c0:a5;
#  fixed-address fantasia.fugue.com;
#}

# You can declare a class of clients and then do address allocation
# based on that.   The example below shows a case where all clients
# in a certain class get addresses on the 10.17.224/24 subnet, and all
# other clients get addresses on the 10.0.29/24 subnet.

#class "foo" {
#  match if substring (option vendor-class-identifier, 0, 4) = "SUNW";
#}

#shared-network 224-29 {
#  subnet 10.17.224.0 netmask 255.255.255.0 {
#    option routers rtr-224.example.org;
#  }
#  subnet 10.0.29.0 netmask 255.255.255.0 {
#    option routers rtr-29.example.org;
#  }
#  pool {
#    allow members of "foo";
#    range 10.17.224.10 10.17.224.250;
#  }
#  pool {
#    deny members of "foo";
#    range 10.0.29.10 10.0.29.230;
#  }
#}

isc-dhcp-server

# Defaults for dhcp initscript
# sourced by /etc/init.d/dhcp
# installed at /etc/default/isc-dhcp-server by the maintainer scripts

#
# This is a POSIX shell fragment
#

# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
#	Separate multiple interfaces with spaces, e.g. "eth0 eth1".
INTERFACES="eth0"

mail.sh

#!/bin/bash

if [ $(id -u) != 0 ]
	then
   	echo -e "This script must be run as root user . \nGo back and try again as root user"
   	exit 1
fi

echo "Make sure you've seen the screenshots for postfix!"
read -rsp $'Press enter to continue...\n'

echo 'Updating and installing packages....'

# sudo apt-get update
sudo apt-get install -y --force-yes postfix dovecot-common dovecot-pop3d dovecot-imapd mailutils

sed -i 's/.*inet_interfaces.*/inet_interfaces = all /' /etc/postfix/main.cf
sed -i 's/.*inet_interfaces = localhost.*/#inet_interfaces = localhost /' /etc/postfix/main.cf

echo -e '\ntransport_maps = hash:/etc/postfix/transport \n' >> /etc/postfix/main.cf

#changing in postfix file
touch /etc/postfix/aliases /etc/postfix/transport

# update aliases transport databases
postalias /etc/postfix/aliases
postmap /etc/postfix/transport
postmap hash:/etc/postfix/transport

# changing in dovecot confg file

sed -i 's/.*mail_privileged.*/mail_privileged_group = mail /' /etc/dovecot/conf.d/10-mail.conf
sed -i 's/.*mail_location.*/mail_location = mbox:~\/mail:INBOX=\/var\/mail\/%u /' /etc/dovecot/conf.d/10-mail.conf

service dovecot restart
service postfix restart

echo ''
echo 'For any error see log file\npath = /var/log/mail.log'
echo ''

echo "All Done!"
echo "Open a new terminal, try sending a mail:"
echo "echo 'Body of your mail' | mail -s 'Subject of your mail' root@duffer-ubuntu"
echo "Open another terminal window, and check the mail by: 'sudo mail'"