Salah satu faktor yang menyebabkan layanan BaliFiber lambat ada di sisi respon DNS. Pada beberapa kasus ukuran query DNS Balifiber bisa sampai 3x lipat dari DNS lain seperti OpenDNS dan Cloudflare.
Bisa dibilang kualitas DNS Balifiber tidak bagus untuk digunakan sehari-hari, yang ada malah memperlambat proses loading website. Salah satu kemungkinan masalah DNS ini adalah ketika anda mendownload ataupun tes speedtest dapat kecepatan penuh, tetapi sewaktu browsing terasa lambat.
Buat apa 100 Mbps kalo buka google.com aja lambat?
Beberapa contoh
$ dig google.com TXT ; <<>> DiG 9.11.11-RedHat-9.11.11-1.fc30 <<>> google.com TXT ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17054 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 13, ADDITIONAL: 27 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;google.com. IN TXT ;; ANSWER SECTION: google.com. 299 IN TXT "docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e" google.com. 299 IN TXT "facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95" google.com. 299 IN TXT "v=spf1 include:_spf.google.com ~all" google.com. 299 IN TXT "docusign=1b0a6754-49b1-4db5-8540-d2c12664b289" google.com. 299 IN TXT "globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=" ;; AUTHORITY SECTION: com. 97209 IN NS c.gtld-servers.net. com. 97209 IN NS f.gtld-servers.net. com. 97209 IN NS i.gtld-servers.net. com. 97209 IN NS e.gtld-servers.net. com. 97209 IN NS l.gtld-servers.net. com. 97209 IN NS b.gtld-servers.net. com. 97209 IN NS a.gtld-servers.net. com. 97209 IN NS d.gtld-servers.net. com. 97209 IN NS j.gtld-servers.net. com. 97209 IN NS k.gtld-servers.net. com. 97209 IN NS m.gtld-servers.net. com. 97209 IN NS h.gtld-servers.net. com. 97209 IN NS g.gtld-servers.net. ;; ADDITIONAL SECTION: a.gtld-servers.net. 97209 IN A 192.5.6.30 a.gtld-servers.net. 97209 IN AAAA 2001:503:a83e::2:30 b.gtld-servers.net. 110404 IN A 192.33.14.30 b.gtld-servers.net. 97209 IN AAAA 2001:503:231d::2:30 c.gtld-servers.net. 97209 IN A 192.26.92.30 c.gtld-servers.net. 110404 IN AAAA 2001:503:83eb::30 d.gtld-servers.net. 97209 IN A 192.31.80.30 d.gtld-servers.net. 97209 IN AAAA 2001:500:856e::30 e.gtld-servers.net. 97209 IN A 192.12.94.30 e.gtld-servers.net. 97209 IN AAAA 2001:502:1ca1::30 f.gtld-servers.net. 110404 IN A 192.35.51.30 f.gtld-servers.net. 94999 IN AAAA 2001:503:d414::30 g.gtld-servers.net. 110404 IN A 192.42.93.30 g.gtld-servers.net. 57970 IN AAAA 2001:503:eea3::30 h.gtld-servers.net. 97209 IN A 192.54.112.30 h.gtld-servers.net. 110404 IN AAAA 2001:502:8cc::30 i.gtld-servers.net. 159177 IN A 192.43.172.30 i.gtld-servers.net. 97209 IN AAAA 2001:503:39c1::30 j.gtld-servers.net. 97209 IN A 192.48.79.30 j.gtld-servers.net. 97209 IN AAAA 2001:502:7094::30 k.gtld-servers.net. 110404 IN A 192.52.178.30 k.gtld-servers.net. 97209 IN AAAA 2001:503:d2d::30 l.gtld-servers.net. 28907 IN A 192.41.162.30 l.gtld-servers.net. 110404 IN AAAA 2001:500:d937::30 m.gtld-servers.net. 110404 IN A 192.55.83.30 m.gtld-servers.net. 97209 IN AAAA 2001:501:b1f9::30 ;; Query time: 48 msec ;; SERVER: 103.94.168.169#53(103.94.168.169) ;; WHEN: Wed Oct 23 22:30:44 WIB 2019 ;; MSG SIZE rcvd: 1148 > dig google.com MX ; <<>> DiG 9.11.11-RedHat-9.11.11-1.fc30 <<>> google.com MX ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11262 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 11 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;google.com. IN MX ;; ANSWER SECTION: google.com. 599 IN MX 10 aspmx.l.google.com. google.com. 599 IN MX 50 alt4.aspmx.l.google.com. google.com. 599 IN MX 30 alt2.aspmx.l.google.com. google.com. 599 IN MX 40 alt3.aspmx.l.google.com. google.com. 599 IN MX 20 alt1.aspmx.l.google.com. ;; AUTHORITY SECTION: google.com. 76386 IN NS ns2.google.com. google.com. 76386 IN NS ns1.google.com. google.com. 76386 IN NS ns3.google.com. google.com. 76386 IN NS ns4.google.com. ;; ADDITIONAL SECTION: alt1.ASPMX.l.google.com. 266 IN A 173.194.202.27 alt2.ASPMX.l.google.com. 14 IN A 74.125.127.27 ns1.google.com. 154413 IN A 216.239.32.10 ns1.google.com. 154413 IN AAAA 2001:4860:4802:32::a ns2.google.com. 154413 IN A 216.239.34.10 ns2.google.com. 154413 IN AAAA 2001:4860:4802:34::a ns3.google.com. 7591 IN A 216.239.36.10 ns3.google.com. 154413 IN AAAA 2001:4860:4802:36::a ns4.google.com. 154413 IN A 216.239.38.10 ns4.google.com. 154413 IN AAAA 2001:4860:4802:38::a ;; Query time: 34 msec ;; SERVER: 103.94.168.168#53(103.94.168.168) ;; WHEN: Wed Oct 23 22:58:57 WIB 2019 ;; MSG SIZE rcvd: 443
dibandingkan dengan query Cloudflare
> dig google.com TXT @1.1.1.1 ; <<>> DiG 9.11.11-RedHat-9.11.11-1.fc30 <<>> google.com TXT @1.1.1.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22272 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1452 ;; QUESTION SECTION: ;google.com. IN TXT ;; ANSWER SECTION: google.com. 143 IN TXT "v=spf1 include:_spf.google.com ~all" google.com. 143 IN TXT "docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e" google.com. 143 IN TXT "docusign=1b0a6754-49b1-4db5-8540-d2c12664b289" google.com. 143 IN TXT "facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95" google.com. 143 IN TXT "globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=" ;; Query time: 20 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Wed Oct 23 22:57:27 WIB 2019 ;; MSG SIZE rcvd: 352 > dig google.com MX @1.1.1.1 ; <<>> DiG 9.11.11-RedHat-9.11.11-1.fc30 <<>> google.com MX @1.1.1.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4942 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1452 ;; QUESTION SECTION: ;google.com. IN MX ;; ANSWER SECTION: google.com. 393 IN MX 40 alt3.aspmx.l.google.com. google.com. 393 IN MX 50 alt4.aspmx.l.google.com. google.com. 393 IN MX 10 aspmx.l.google.com. google.com. 393 IN MX 20 alt1.aspmx.l.google.com. google.com. 393 IN MX 30 alt2.aspmx.l.google.com. ;; Query time: 23 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Wed Oct 23 22:58:53 WIB 2019 ;; MSG SIZE rcvd: 147
agar output dari dig DNS Balifiber dengan Cloudflare DNS Resolver, bisa dicurangi dengan dig google.com txt +noauthority +noadditional
> dig google.com txt +noauthority +noadditional ; <<>> DiG 9.11.11-RedHat-9.11.11-1.fc30 <<>> google.com txt +noauthority +noadditional ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60510 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 9 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;google.com. IN TXT ;; ANSWER SECTION: google.com. 299 IN TXT "v=spf1 include:_spf.google.com ~all" google.com. 299 IN TXT "globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=" google.com. 299 IN TXT "docusign=1b0a6754-49b1-4db5-8540-d2c12664b289" google.com. 299 IN TXT "facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95" google.com. 299 IN TXT "docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e" ;; Query time: 91 msec ;; SERVER: 103.94.168.168#53(103.94.168.168) ;; WHEN: Wed Oct 23 23:03:06 WIB 2019 ;; MSG SIZE rcvd: 600
tetapi tetap saja ukuran data yang diterima tetap besar, perintah diatas hanya menghilangkan bagian yang kurang perlu.
Solusi
1. Dari sisi Balifiber
– pindah web server ke server yang berbeda, gunakan 1 server 1 services
– percepat/perkecil respon dengan hanya menampilkan query yang diminta
– cache dns
2. Dari sisi pengguna/customer
Cara diatas hanya bisa dilakukan oleh pihak Balifiber dan belum tentu dilakukan. Solusinya adalah menggunakan DNS pihak ketiga, seperti
CloudFlare DNS
1.1.1.1
1.0.0.1
Google DNS
8.8.8.8
8.8.4.4
bisa juga digabungkan
dns 1 : 1.1.1.1
dns 2 : 8.8.8.8
selain kedua cara diatas bisa juga dengan Unbound atau DNSCrypt untuk caching query DNS anda.
DNS Server Balifiber
Bagi anda yang mau tau software apa dibalik DNS Balifiber, lihat dengan perintah
> nslookup -q=txt -class=CHAOS version.bind 103.94.168.168 Server: 103.94.168.168 Address: 103.94.168.168#53 version.bind text = "9.10.3-P4-Ubuntu"
Dari informasi diatas bisa kita ketahuin DNS Balifiber menggunakan Bind9 di Ubuntu
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