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Saturday, 25 March 2017

Konfigurasi DNS

March 25, 2017 Posted by Bops No comments
DOMAIN
posted 28 November 2013
By Nazih bopas



DNS (Domain Name System)
------------------------
DNS digunakan untuk menerjemahkan nama domain/hostname menjadi IP address.
Untuk kemudahan dalam mengakses dan mudah diingat. Contoh nama domain:
www.nurulfikri.com

Hirarki DNS
-----------
                                   . (root DNS)
                                   |
   ---------------------------------------------------------------
   |       |       |       |      |      |       |       |       |    
  .com    .net    .org    .gov   .tv    .id     .uk     .sg     .my top level
   |                                     |                           domain
   |                              ------------------------
   |                              |     |     |     |     |
  yahoo                          .co   .web  .or   .ac   .sch   second level
   |                                          |                    domain
 --------------                               |
 |      |     |                               |
www    mail  groups                         lp3tnf
                                              |
                                        ----------------
                                        |    |    |    |
                                       www  mail  hmik pesantren

  

Kegunaan DNS:
- menerjemahkan nama domain menjadi IP address
- memetakan nama domain ke suatu IP address
- melakukan caching nama domain
- menentukan mail server

Bind
----
Instalasi :
yum install bind-utils bind-chroot bind caching-nameserver

File konfigurasi :
- /etc/named.caching-nameserver.conf --> konfigurasi utama
- /etc/named.rfc1912.zones --> Penentuan zone yang akan dikelola dan tipe DNS
- /var/named/chroot/var/named --> File-file konfigurasi setiap zone
---------------------------------------------------------------------------
- /etc/named.conf atau /var/named/chroot/etc/named.conf --> kalau ada hapus

Nama service : named

Tipe-tipe DNS
-------------
- Master DNS, mengelola domain, file konfigurasi ada di komputer.
- Slave DNS, mengelola domain, file konfigurasi diambil dari master.
- Caching DNS, melakukan caching nama domain.
- Forwarding DNS, meneruskan ke DNS yang sebenarnya.

Konfigurasi Dasar DNS
-----------------------
Secara default sudah bisa digunakan ketika service Bind diaktifkan, tetapi
hanya untuk localhost.
# vim /etc/named.conf
-----------------------------------------------
options {
        // IP yang digunakan untuk mendengarkan permintaan klien
        // Ingat diakhiri dengan ";"
    listen-on port 53 { 192.168.1.185; 127.0.0.1; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        // Komputer yang boleh melakukan query dari DNS server
        // any, berarti semua diperbolehkan
    allow-query     { any; };
        recursion yes;
   
    // Untuk mempermudah konfigurasi maka DNS security bisa dimatikan
        // dnssec-enable dan dnssec-validation diubah menjadi no
        dnssec-enable no;
        dnssec-validation no;
        dnssec-lookaside auto;

        /* Path to ISC DLV key */
        bindkeys-file "/etc/named.iscdlv.key";

        managed-keys-directory "/var/named/dynamic";
};
--------------------------------------------
# service named restart
# netstat -tanp | grep :53 --> Cek LISTEN

Konfigurasi Master DNS
----------------------
Ingin buat domain : dudi.oke
Memiliki sub domain : - blog.dudi.oke
                      - mail.dudi.oke
                      - forum.dudi.oke

# vim /etc/named.rfc1912.zones
  Ke paling bawah
  zone "dudi.oke" IN {
      type master;
        file "dudi.zone";
  };
  ---------------------------------
# cd /var/named/chroot/var/named
# cp localhost.zone dudi.zone
# vim dudi.zone
-------------------------------------
$TTL    86400
$ORIGIN dudi.oke.
@               IN SOA  ns.dudi.oke.       root.dudi.oke. (
                                   42              ; serial (d. adams)
                                   3H              ; refresh
                                   15M             ; retry
                                   1W              ; expiry
                                   1D )            ; minimum

                IN NS           ns.dudi.oke.
                IN A            192.168.1.229
                IN MX 10     mail.dudi.oke.
ns        IN A        192.168.1.229
mail         IN A        192.168.1.229
blog        IN A        192.168.1.229
forum        IN A        192.168.1.229

www        IN CNAME      dudi.oke.
-------------------------------------
# chgrp named dudi.zone
# service named restart
# tail /var/log/messages -->  apakah konfigurasi domain sudah diload ?
# dig dudi.oke @127.0.0.1 --> Pengujian domain

Membuat Top Level Domain
------------------------
Top Level domain yang dibuat ".oke"
# vim /etc/named.rfc1912.zones
  Ke paling bawah
  zone "nf" IN {
        type master;
        file "nf.zone";
  };
  ---------------------------------
# cd /var/named/chroot/var/named
# cp localhost.zone nf.zone
# vim nf.zone
-------------------------------------
$TTL    86400
$ORIGIN nf.
nf.          IN SOA  ns.nf.       root.oke. (
                                   42              ; serial (d. adams)
                                   3H              ; refresh
                                   15M             ; retry
                                   1W              ; expiry
                                   1D )            ; minimum

nf.                IN NS           ns.nf.
nf.                IN A            192.168.1.123
ns.nf.             IN A            192.168.1.123

melati.nf.        IN NS        ns.melati.nf.
ns.melati.nf.        IN A        192.168.1.242

-------------------------------------
# chgrp named oke.zone
# service named restart
Siswa diminta mengubah /etc/resolv.conf ke server tld ".oke"

Konfigurasi Slave DNS
=====================
Slave DNS, mengambil konfigurasi dari master DNS secara periodik.
Dapat difungsikan sebagai backup DNS master.

Konfigurasi pada Slave
======================
# vim /etc/named.rfc1912.zones
zone "bunga.oke" IN {
    type slave;
    file "slaves/bunga.oke";
    masters {192.168.5.96;};
};
# service named restart

Konfigurasi pada Master (bunga.oke)
=======================
# iptables -I INPUT 1 -p tcp --dport 53 -j ACCEPT
# vim /etc/named.rfc1912.zones
zone "bunga.oke" IN {
    type master;
    file "nuri.oke.zone";
    allow-transfer {192.168.5.0/24;};
};

Konfigurasi DNS slave sebagai salah satu pengelola domain
# vim /var/named/bunga.oke.zone
$ORIGIN .
$TTL 86400      ; 1 day
bunga.oke               IN SOA  ns.bunga.oke. root.bunga.oke. (
                                220131123  ; serial
                                86400      ; refresh (1 day)
                                3600       ; retry (1 hour)
                                604800     ; expire (1 week)
                                10800      ; minimum (3 hours)
                                )
                        NS      ns.bunga.oke.
            NS    ns2.bunga.oke.   ;--> IP DNS slave
                        A       192.168.5.96
                        MX      10 mail.bunga.oke.
ns2            A     192.168.5.13
ns            A    192.168.5.96

# service named restart

Konfiguras ACL DNS
==================
Digunakan untuk memberikan hasil pencarian yang berbeda untuk pengaksesan dari klien DNS yang
berbeda jaringan. Misalnya untuk memberikan alamat IP privat untuk suatu domain kepada jaringan
LAN dan memberikan alamat IP publik untuk klien di internet.

Fungsi:
- Mengatasi Network Address Translation (NAT tidak bisa digunakan pada jaringan privat)
- Membuat website intranet (website untuk jaringan LAN saja)

# vim /etc/named.acl
acl internal { 192.168.0.0/16; 172.16.0.0/12; 10.0.0.0/8; };
acl eksternal { !192.168.0.0/16; !172.16.0.0/12; !10.0.0.0/8; any; };

# vim /etc/named.conf
//zone "." IN {
//        type hint;
//        file "named.ca";
//};

//include "/etc/named.rfc1912.zones";
include "/etc/named.acl";

view internal_resolver {
        match-clients      { internal;};
        match-destinations { any; };
        recursion yes;
        include "/etc/named.internal.zone";
};
view external_resolver {
        match-clients      { eksternal;};
        match-destinations { any; };
        recursion yes;
        include "/etc/named.eksternal.zone";
};

# cp /etc/named.rf1912.zone /etc/named.internal.zone
# cp /etc/named.rf1912.zone /etc/named.eksternal.zone

# vim /etc/named.internal.zone
zone "." IN {
        type hint;
        file "named.ca";
};

zone "ojolali.com" IN {
    type master;
    file ojolali.internal.zone;
};

# vim /etc/named.eksternal.zone
zone "." IN {
        type hint;
        file "named.ca";
};

zone "ojolali.com" IN {
    type master;
    file ojolali.eksternal.zone;
};

# vim /var/named/ojolali.internal.zone
$TTL 86400
$ORIGIN ojolali.com.
ojolali.com.    IN SOA  ns.ojolali.com. root.ojolali.com. (
                        42;
                        3H;
                        15M;
                        1W;
                        1D);
ojolali.com.            IN NS ns.ojolali.com.
ojolali.com.            IN A 192.168.56.10
ns.ojolali.com.         IN A 192.168.56.10
ojolali.com.            IN MX 10 mail.ojolali.com.
mail.ojolali.com.               IN A 192.168.56.10
www.ojolali.com.                IN CNAME ojolali.com.


# vim /var/named/ojolali.eksternal.zone
$TTL 86400
$ORIGIN ojolali.com.
ojolali.com.    IN SOA  ns.ojolali.com. root.ojolali.com. (
                        42;
                        3H;
                        15M;
                        1W;
                        1D);
ojolali.com.            IN NS ns.ojolali.com.
ojolali.com.            IN A 123.45.67.89
ns.ojolali.com.         IN A 123.45.67.89
ojolali.com.            IN MX 10 mail.ojolali.com.
mail.ojolali.com.               IN A 123.45.67.89
www.ojolali.com.                IN CNAME ojolali.com.


# chgrp named /var/named/ojolali.*
# chgrp named /etc/named.internal.zone
# chgrp named /etc/named.eksternal.zone

# service named restart

Game PC (BMW M3)

March 25, 2017 Posted by Bops 1 comment
Share BMW_M3_Challenge.exe - 346 MB

BMW M3 Challenge is a racing game from the British study of Blimey! Games. The stimulus, which caused that this production saw the light of day, there was an agreement concluded between the advertising, her Publisher, 10tacle Studios ' Corporation and German automotive Corporation Bayer Motoren Werke (BMW). What is worth mention, the first presentation of the title took place during the international automotive exhibition IAA International Motor Show held annually in Frankfurt am Main.

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