https://livlikwav.github.io/study/grpc-and-its-history/
$ ip link delete vxlan.calicoHow To Configure BIND as a Private Network DNS Server on Ubuntu 18.04
Details
$ sudo su
$ apt update
$ apt install bind9 bind9utils bind9-doc
$ systemctl status bind9
● bind9.service - BIND Domain Name Server
Loaded: loaded (/lib/systemd/system/bind9.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2020-06-27 02:24:44 KST; 58min ago
Docs: man:named(8)
Process: 8723 ExecStop=/usr/sbin/rndc stop (code=exited, status=0/SUCCESS)
Main PID: 8726 (named)
Tasks: 11 (limit: 4915)
CGroup: /system.slice/bind9.service
└─8726 /usr/sbin/named -f -u bind -4
$ vi /etc/default/bind9
...
OPTIONS="-u bind -4"
$ vi /etc/bind/named.conf.options
...
options {
...
listen-on port 53 {
localhost; 70.50.183.0/24;
};
allow-query {
any;
};
...
}
$ vi /etc/bind/named.conf.local
...
// forward zone config
zone "nexledger.com" {
type master;
file "/etc/bind/zones/db.nexledger.com"; # zone file path
};
// backward zone config
zone "183.50.70.in-addr.arpa" {
type master;
file "/etc/bind/zones/db.nexledger.com.rev"; # zone file path
};
$ mkdir /etc/bind/zones
$ vi /etc/bind/zones/db.nexledger.com
$TTL 604800
@ IN SOA ns1.nexledger.com. root.nexledger.com. (
3 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
; name server - NS records
@ IN NS ns.nexledger.com.
; name servers - A records
ns IN A 70.50.183.152
; 70.50.183.0/24 - A records
worker01 IN A 70.50.183.49
worker02 IN A 70.50.183.110
worker03 IN A 70.50.183.111
worker04 IN A 70.50.183.63
$ vi /etc/bind/zones/db.chat.nexledger.com.rev
$TTL 604800
@ IN SOA nexledger.com. root.nexledger.com. (
3 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
; name servers
@ IN NS ns.
; PTR Records
152 IN PTR ns1.nexledger.com. ; 70.50.183.152
49 IN PTR worker01.nexledger.com. ; 70.50.183.49
110 IN PTR worker02.nexledger.com. ; 70.50.183.110
111 IN PTR worker03.nexledger.com. ; 70.50.183.111
63 IN PTR worker04.nexledger.com. ; 70.50.183.63
$ named-checkconf
$ named-checkzone nexledger.com db.nexledger.com
$ systemctl restart bind9
$ nslookup worker01.nexledger.comDetails
$ sudo su
$ vi /etc/resolv.conf
nameserver 70.50.183.87
nameserver 127.0.0.53
$ apt install resolvconf
# resolv.conf 재적용
$ resolvconf -u
$ vi /etc/environment
no_proxy="127.0.0.1,localhost,chat.nexledger.com"http://700billion.blogspot.com/2012/02/etcresolvconf.html
Details
- domain
기본도메인을 설정한다.
만약 domain 지시자를 이용해서 기본 도메인을 설정하였다면 호스트네임을 보고 기본 도메인을 결정하는것이 아니라 resolv.conf 파일에있는 domain 지시자에 설정된도메인을 기본도메인으로 가지게된다.
즉 호스트네임보다는 resolv.conf 의 domain 지시자에게 정의된 기본 도메인이 우선한다는 의미이다.
- search
이 역시 domain 지시자와 같이 기본 도메인을 설정하는 기능을가진다.
이 지시자는 한 라인에 여러게의 도메인을 지정할수있다.
- nameserver
이 지시자는 질의할 네임서버의 주소를 Resolver에게 알려주어 해당 네임서버를 사용할수있게끔 한다.
이 지시자를 사용하여 최대 3 개의 네임서버를 설정할수있다.
- sortlist
이 지시자는 질의에대한 응답으로 하나 이상의 IP 정보를 리턴할때 선호하는 네트워크와 서브넷을 지정하여
리졸버가 여러개의 주소중 원하는 네트워크 IP 주소를 우선적으로 가지도록 설정한다.
- option
- ndots
search 리스트의 도메인들을 뒤에 덧붙이기 전에 리졸버가 입력받은 이름을 그래도 탐색할수 있도록 압력받은 도메인 네임이 반드시 가져야하는 . 의 최소갯수이다.
$ vi /etc/resolv.conf
# nameserver
nameserver 8.8.8.8
# search
search default.svc.cluster.local svc.cluster.local cluster.local asia-northeast1-a.c.beaming-talent-265001.internal c.beaming-talent-265001.internal google.internal
# domain
domain www.naver.com
# sortlist
sortlist 192.168.0.1/255.255.255.0
# options
options ndots:5
- https://medium.com/@yunhochung/ubuntu-ntp-%ED%81%B4%EB%9D%BC%EC%9D%B4%EC%96%B8%ED%8A%B8-%EC%84%9C%EB%B2%84-%EA%B5%AC%EC%84%B1-72fec40b3b7a
- https://extrememanual.net/11096#%EC%9A%B0%EB%B6%84%ED%88%AC-NTP-%EC%84%9C%EB%B2%84%EC%99%80-%EB%8F%99%EA%B8%B0%ED%99%94-%EC%84%A4%EC%A0%95
Details
$ sudo apt install ntp
$ sudo vi /etc/ntp.conf
server 127.127.1.0 # Local NTP Server
restrict 70.50.183.0 mask 255.255.255.0 nomodify notrap
# ntp restart
$ sudo systemctl restart ntp.service
# timedatectl 데몬의 시간 동기화 중지
$ timedatectl set-ntp no
# $ timedatectl
$ timedatectl status
Local time: 금 2020-10-16 12:41:45 KST
Universal time: 금 2020-10-16 03:41:45 UTC
RTC time: 금 2020-10-16 03:41:45
Time zone: Asia/Seoul (KST, +0900)
System clock synchronized: yes
systemd-timesyncd.service active: no
RTC in local TZ: noDetails
$ sudo vi /etc/ntp.conf
server 192.168.137.2 # NTP 서버 주소
$ sudo systemctl restart ntp.service
# timedatectl 데몬의 시간 동기화 중지
$ timedatectl set-ntp no
$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*node1 LOCAL(0) 6 u 313 1024 377 0.308 -0.008 0.026C:\Windows\System32\drivers\etc\hosts
Details
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
127.0.0.1 rolroralra.com
127.0.0.1 cockpit.rolroralra.com
127.0.0.1 blog.rolroralra.com
127.0.0.1 transmission.rolroralra.com
127.0.0.1 plex.rolroralra.com
127.0.0.1 jenkins.rolroralra.com
127.0.0.1 gitlab.rolroralra.com
127.0.0.1 registry.rolroralra.com