Banyak cara memblokir konten porno


Heboh soal saring-menyaring
konten pornografi di
Internet kembali menjadi
topik hangat beberapa pekan
belakangan ini. Sejatinya kini
sudah banyak teknologi,
aplikasi, atau tools yang bisa
dipakai pengguna untuk
menyaring sejumlah konten
berdampak negatif yang
tersebar melalui ranah maya.

Penyaringan atau pemblokiran
konten negatif juga dapat
dilakukan dalam beberapa
metode. Penyaringan bisa
dilakukan dari laptop atau
desktop milik penggunanya;
melalui jaringan lokal di
kantor-kantor, sekolah, atau
warnet; atau langsung dari
hulunya, yakni penyelenggara
jasa Internet (Internet
service provider).
Pengguna juga bisa
mengunduh aplikasi
penyaringan konten porno dari
Internet. Jika dicari lewat
mesin pencari Google, akan
muncul sederet nama aplikasi
atau teknologi penyaringan
tersebut. Sebut saja
NetNanny, Cyber Patrol,
SurfWatch, CYBERsitter,
Program Naomi, dan K9 Web
Protection.
Asosiasi Warung Internet
(Awari) beberapa waktu lalu
juga menggagas proyek DNS
Nawala (Nawala Project),
yakni sebuah layanan sistem
penyaringan berdasarkan
nama domain (domain name
system). Layanan ini didukung
berbagai pihak, tak hanya
pelaku bisnis warnet, tapi
juga Kementerian Komunikasi
dan Informatika serta PT
Telkom sebagai badan usaha
milik negara penyedia jasa
layanan Internet di Indonesia.
Tools yang dimiliki DNS
Nawala secara spesifik akan
menyaring segala jenis konten
negatif, seperti pornografi,
perjudian, situs phising
(penyesatan), serta situs
yang mengandung Malware
(software berbahaya). Akhir
pekan lalu, iTempo sempat
berbincang dengan salah satu
penggiat proyek DNS Nawala,
Irwin Day.
Irwin, yang juga menjabat
Ketua Umum Awari,
menjabarkan beberapa
teknologi atau metode
penyaringan yang bisa
dilakukan. “Pada dasarnya
penyaringan bisa dilakukan
dari mana pun, dari hulu atau
hilir saja atau dari hulu ke
hilir,” katanya. Inilah
beberapa metode
penyaringan tersebut:
* Pemblokiran di laptop atau
komputer
Penyaringan di laptop atau
desktop pengguna ini
tergolong cara yang paling
mudah. Aplikasi atau
teknologinya pun bisa dicari
dan diunduh dengan
mengetikkan kata kunci
“Internet filter software”
atau “content filtering
software”. Pengguna bisa
melihat daftarnya di wikipedia
(http://en.wikipedia.org/wiki/
Category:Content-
control_software).
Aplikasi-aplikasi ini ada yang
dijual, ada pula yang gratis.
Fitur-fitur yang disediakan
juga berbeda-beda. Meski
difokuskan untuk menyaring
konten pornografi dari anak-
anak, penyaringan tergantung
norma budaya di negara
masing-masing. Seperti yang
disebut pornografi legal.
Dengan pengaturan di laptop
atau komputer pribadi, bisa
disesuaikan dengan kebutuhan
penggunanya.
* Pemblokiran di jaringan lokal
Penyaringan atau pemblokiran
di jaringan lokal, seperti di
kantor, rumah, atau warnet,
umumnya menggunakan
teknologi Proxy. Teknologi ini
sering digunakan oleh
administrator seperti Squid
Guard dan Danguardian.
Menurut Irwin, Proxy cukup
efektif apalagi jika diset
sebagai Transparent Proxy.
Sayangnya, jumlah database
yang dimasukkan ke Proxy
terbatas. Dalam uji coba di
warnet ketika mencapai 500
ribu situs, koneksi akan
terganggu dan terjadi delay.
Proxy juga mengubah source
IP address dari pengguna, dan
sering bermasalah ketika
mengakses beberapa situs.
Misalnya Danguardian
menggunakan penyaringan
kata kunci sehingga
administrator harus rajin
merawat daftar situs yang
tidak diblok meski sudah ada
kata kunci.
Penggunaan Proxy tidak akan
bermasalah sepanjang jumlah
penggunanya terbatas.
Namun, jika di tingkat
penyelenggara jasa Internet,
kesalahan penyaringan yang
ditimbulkan itu bisa
mengganggu pengguna.
* Pemblokiran di penyedia
jasa Internet
Pemblokiran di sisi penyedia
jasa Internet (ISP) harus
mempertimbangkan efek yang
terjadi pada kinerja jaringan.
Pertimbangan lainnya adalah
biaya pengguna, efektivitas,
kemudahan implementasi, dan
sosialisasinya. Sebab, jika
terjadi kesalahan, akan
berakibat salah blokir
terhadap situs yang tidak
masuk daftar hitam.
Irwin merekomendasikan tiga
teknologi yang bisa digunakan
di sisi penyedia jasa Internet
ini, yakni DNS Poisoning, Pass
By Filter Appliance, dan BGP
Filtering. Berbeda dengan dua
metode lainnya, biaya
operasional penyaringan pada
metode ini adalah yang
terbesar karena penggunanya
bisa lebih banyak.
Dan biaya itu dikeluarkan oleh
penyedia jasa Internet.
Meski berbiaya besar, dengan
cara penyaringan dari hulu ini,
sistem dapat selalu terbarui
dan lebih efektif saat
menyaring konten yang
diinginkan.
Sumber : tempo interaktif

7 responses to “Banyak cara memblokir konten porno

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