[{"data":1,"prerenderedAt":311},["ShallowReactive",2],{"panduan-article-cara-cek-port-pada-linux":3},{"article":4,"category":298},{"id":5,"title":6,"body":7,"created_at":286,"description":287,"extension":288,"featured":289,"meta":290,"navigation":291,"ogImage":292,"path":293,"robots":292,"schemaOrg":292,"seo":294,"sitemap":295,"stem":296,"updated_at":286,"__hash__":297},"knowledgeBase\u002Fpanduan\u002Fvps\u002Fcara-cek-port-pada-linux.md","Cara Cek Port Pada Linux",{"type":8,"value":9,"toc":278},"minimark",[10,19,24,27,49,53,65,104,133,137,143,169,173,179,210,214,274],[11,12,13,14,18],"p",{},"Panduan ini menjelaskan prosedur untuk memeriksa port yang sedang terbuka dan aktif pada sistem operasi Linux melalui terminal. Mengetahui port yang terbuka sangat berguna untuk memantau keamanan server, memastikannya berjalan dengan baik, serta melakukan ",[15,16,17],"em",{},"troubleshooting"," pada layanan jaringan.",[20,21,23],"h2",{"id":22},"i-persiapan-dan-persyaratan-sistem","I. Persiapan dan Persyaratan Sistem",[11,25,26],{},"Sebelum memulai pengujian port pada Linux, pastikan Anda telah memenuhi beberapa persyaratan dasar berikut:",[28,29,30,34,46],"ul",{},[31,32,33],"li",{},"Memiliki akses ke sistem Linux (secara lokal atau via SSH).",[31,35,36,37,41,42,45],{},"Memiliki akses akun ",[38,39,40],"strong",{},"root"," atau pengguna dengan hak akses ",[38,43,44],{},"sudo",".",[31,47,48],{},"Aplikasi terminal atau klien SSH (seperti PuTTY atau OpenSSH).",[20,50,52],{"id":51},"ii-memeriksa-port-menggunakan-command-ss","II. Memeriksa Port Menggunakan Command ss",[11,54,55,56,60,61,64],{},"Perintah ",[57,58,59],"code",{},"ss"," (Socket Statistics) merupakan alat modern pengganti ",[57,62,63],{},"netstat"," yang lebih cepat dan efisien dalam menampilkan informasi port pada distribusi Linux terkini.",[66,67,68,71,90],"ol",{},[31,69,70],{},"Buka terminal Linux Anda.",[31,72,73,74],{},"Jalankan perintah berikut untuk melihat semua port TCP dan UDP yang sedang mendengarkan (listening) beserta nama prosesnya:",[75,76,81],"pre",{"className":77,"code":78,"language":79,"meta":80,"style":80},"language-plaintext shiki shiki-themes github-light github-dark","sudo ss -tulnp\n","plaintext","",[57,82,83],{"__ignoreMap":80},[84,85,88],"span",{"class":86,"line":87},"line",1,[84,89,78],{},[31,91,92,95,96,99,100,103],{},[38,93,94],{},"Hasil yang Diharapkan:"," Sistem akan menampilkan tabel daftar port yang aktif. Perhatikan kolom ",[38,97,98],{},"Local Address:Port"," untuk melihat nomor port dan kolom ",[38,101,102],{},"Users"," untuk melihat nama layanan\u002Faplikasi yang menggunakannya.",[105,106,107],"blockquote",{},[11,108,109,112,113,116,117,120,121,124,125,128,129,132],{},[38,110,111],{},"Catatan:"," Parameter ",[57,114,115],{},"-t"," digunakan untuk TCP, ",[57,118,119],{},"-u"," untuk UDP, ",[57,122,123],{},"-l"," untuk port yang listening, ",[57,126,127],{},"-n"," untuk menampilkan nomor port (bukan nama layanan), dan ",[57,130,131],{},"-p"," untuk menampilkan PID\u002Fnama proses.",[20,134,136],{"id":135},"iii-memeriksa-port-menggunakan-command-netstat","III. Memeriksa Port Menggunakan Command netstat",[11,138,139,140,142],{},"Meskipun sudah tergolong utilitas lama (deprecated) pada beberapa distro baru, ",[57,141,63],{}," masih sangat populer dan banyak digunakan pada server Linux senior.",[66,144,145,152,164],{},[31,146,147,148,151],{},"Pastikan paket net-tools sudah terpasang. Jika belum, pasang menggunakan perintah paket manajer distro Anda (misal: ",[57,149,150],{},"sudo apt install net-tools",").",[31,153,154,155],{},"Jalankan perintah berikut untuk memeriksa port aktif:",[75,156,158],{"className":77,"code":157,"language":79,"meta":80,"style":80},"sudo netstat -tulnp\n",[57,159,160],{"__ignoreMap":80},[84,161,162],{"class":86,"line":87},[84,163,157],{},[31,165,166,168],{},[38,167,94],{}," Terminal akan menampilkan baris status koneksi jaringan, Protokol (TCP\u002FUDP), alamat lokal beserta nomor port, serta nama program yang berjalan.",[20,170,172],{"id":171},"iv-memeriksa-port-menggunakan-command-lsof","IV. Memeriksa Port Menggunakan Command lsof",[11,174,55,175,178],{},[57,176,177],{},"lsof"," (LiSt Open Files) digunakan untuk melihat file yang sedang dibuka oleh sistem, termasuk koneksi jaringan dan port spesifik.",[66,180,181,193,205],{},[31,182,183,184],{},"Untuk melihat semua port yang sedang listening di sistem, jalankan:",[75,185,187],{"className":77,"code":186,"language":79,"meta":80,"style":80},"sudo lsof -i -P -n | grep LISTEN\n",[57,188,189],{"__ignoreMap":80},[84,190,191],{"class":86,"line":87},[84,192,186],{},[31,194,195,196],{},"Jika Anda ingin mengecek status port tertentu (misalnya port 80 untuk web server HTTP), jalankan perintah:",[75,197,199],{"className":77,"code":198,"language":79,"meta":80,"style":80},"sudo lsof -i :80\n",[57,200,201],{"__ignoreMap":80},[84,202,203],{"class":86,"line":87},[84,204,198],{},[31,206,207,209],{},[38,208,94],{}," Jika port 80 digunakan, sistem akan menampilkan nama perintah (COMMAND), PID, USER, serta tipe koneksi pada port tersebut. Jika tidak ada keluaran yang muncul, artinya port tersebut sedang tidak digunakan.",[20,211,213],{"id":212},"hal-penting-yang-perlu-diperhatikan","Hal Penting yang Perlu Diperhatikan",[28,215,216,230,236,254,264],{},[31,217,218,221,222,225,226,229],{},[38,219,220],{},"Peringatan Keamanan:"," Jangan pernah membiarkan port yang tidak terpakai (seperti port database 3306 atau 5432) terbuka untuk akses publik. Tutup port tersebut menggunakan firewall (misal: ",[38,223,224],{},"UFW"," atau ",[38,227,228],{},"iptables",") jika tidak diperlukan.",[31,231,232,235],{},[38,233,234],{},"Praktik Terbaik:"," Ubah port default untuk layanan krusial seperti SSH (port 22) ke nomor port acak yang aman untuk mengurangi risiko serangan brute-force.",[31,237,238,241,242,244,245,247,248,250,251,253],{},[38,239,240],{},"Kesalahan Umum:"," Menjalankan perintah ",[57,243,59],{},", ",[57,246,63],{},", atau ",[57,249,177],{}," tanpa menggunakan akses ",[57,252,44],{},". Tanpa hak akses root, nama proses dan PID yang mengikat port tidak akan ditampilkan secara lengkap.",[31,255,256,259,260,263],{},[38,257,258],{},"Rekomendasi Keamanan:"," Secara berkala lakukan audit port terbuka pada server produksi Anda untuk mendeteksi aplikasi mencurigakan atau ",[15,261,262],{},"backdoor"," secara dini.",[31,265,266,269,270,273],{},[38,267,268],{},"Tips Pemeliharaan:"," Matikan atau hentikan layanan (",[15,271,272],{},"service",") yang tidak lagi digunakan daripada hanya menutup port pada firewall agar sumber daya sistem tetap efisien.",[275,276,277],"style",{},"html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":80,"searchDepth":279,"depth":279,"links":280},2,[281,282,283,284,285],{"id":22,"depth":279,"text":23},{"id":51,"depth":279,"text":52},{"id":135,"depth":279,"text":136},{"id":171,"depth":279,"text":172},{"id":212,"depth":279,"text":213},"2026-09-09","Panduan ini menjelaskan prosedur untuk memeriksa port yang sedang terbuka dan aktif pada sistem operasi Linux melalui terminal. Mengetahui port yang terbuk...","md",false,{},true,null,"\u002Fpanduan\u002Fvps\u002Fcara-cek-port-pada-linux",{"title":6,"description":287},{"loc":293},"panduan\u002Fvps\u002Fcara-cek-port-pada-linux","wWj8I0g12XiCipVa7zykJBSUjw9gznqjzdV7m4orJ_w",{"id":299,"title":80,"body":300,"description":304,"extension":288,"meta":305,"name":306,"navigation":291,"path":307,"seo":308,"stem":309,"__hash__":310},"knowledgeBaseCategories\u002Fpanduan\u002Fvps\u002Findex.md",{"type":8,"value":301,"toc":302},[],{"title":80,"searchDepth":279,"depth":279,"links":303},[],"Pengelolaan akun _VPS_ secara umum.",{},"VPS","\u002Fpanduan\u002Fvps",{"description":304},"panduan\u002Fvps\u002Findex","OY43n-_eRXCpFgpOE94SqjGk4J7e1-IXWvMwMNin6Qs",1793089356314]