[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.s-tap.cz\/co-dela-firewall\/#Article","mainEntityOfPage":"https:\/\/www.s-tap.cz\/co-dela-firewall\/","headline":"Co d\u011bl\u00e1 firewall","name":"Co d\u011bl\u00e1 firewall","description":"Nejd\u0159\u00edve to zkus\u00edme s tou slo\u017eit\u011bj\u0161\u00ed definic\u00ed, kter\u00e1 v\u00e1m asi, stejn\u011b jako mn\u011b, nic ne\u0159ekne. Firewall je s\u00ed\u0165ov\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 zabezpe\u010duje s\u00edt\u011b s r\u016fznou d\u016fv\u011bryhodnost\u00ed a zabezpe\u010den\u00edm. M\u016f\u017ee b\u00fdt jak softwarov\u00e1 (nej\u010dast\u011bji), ale i hardwarov\u00e1. Cel\u00fd syst\u00e9m byl kdysi postaven na kontrole paket\u016f, pozd\u011bji jak paket\u016f, tak protokol\u016f a nyn\u00ed toho zvl\u00e1d\u00e1 neskute\u010dn\u011b hodn\u011b. Pokud […]","datePublished":"2025-03-01","dateModified":"2023-04-30","author":{"@type":"Person","@id":"https:\/\/www.s-tap.cz\/author\/#Person","name":"","url":"https:\/\/www.s-tap.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/5522eb0fc8481dea5f6519f6a0b15ee2c46358d48429b281fd7c49cbb5a929f9?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/5522eb0fc8481dea5f6519f6a0b15ee2c46358d48429b281fd7c49cbb5a929f9?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"s-tap.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.s-tap.cz\/wp-content\/uploads\/img_a342341_w2404_t1555163828.png","url":"https:\/\/www.s-tap.cz\/wp-content\/uploads\/img_a342341_w2404_t1555163828.png","height":0,"width":0},"url":"https:\/\/www.s-tap.cz\/co-dela-firewall\/","wordCount":418,"articleBody":"Nejd\u0159\u00edve to zkus\u00edme s tou slo\u017eit\u011bj\u0161\u00ed definic\u00ed, kter\u00e1 v\u00e1m asi, stejn\u011b jako mn\u011b, nic ne\u0159ekne. Firewall je s\u00ed\u0165ov\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 zabezpe\u010duje s\u00edt\u011b s r\u016fznou d\u016fv\u011bryhodnost\u00ed a zabezpe\u010den\u00edm. M\u016f\u017ee b\u00fdt jak softwarov\u00e1 (nej\u010dast\u011bji), ale i hardwarov\u00e1. Cel\u00fd syst\u00e9m byl kdysi postaven na kontrole paket\u016f, pozd\u011bji jak paket\u016f, tak protokol\u016f a nyn\u00ed toho zvl\u00e1d\u00e1 neskute\u010dn\u011b hodn\u011b. Pokud jste p\u0159ede\u0161l\u00fd odstavec pochopili, nemus\u00edte d\u00e1le \u010d\u00edst. Nu a ti ostatn\u00ed\u2026  Firewall si p\u0159edstavte jako v\u00fdprav\u010d\u00edho(spr\u00e1vce s\u00edt\u011b). Ten rozhoduje o tom, kdo na n\u00e1dra\u017e\u00ed m\u016f\u017ee a kdo ne. Kontrolou jednotliv\u00fdch vag\u00f3nk\u016f (paket\u016f) ud\u011bluje svolen\u00ed a ty nedobr\u00e9 zastavuje. N\u00e1dra\u017e\u00ed je jako v\u00e1\u0161 po\u010d\u00edta\u010d a ve\u0161ker\u00fd dal\u0161\u00ed hardware k n\u011bmu p\u0159ipojen\u00fd. Tak nev\u00edm, kter\u00e9 pod\u00e1n\u00ed je lep\u0161\u00ed, ale mysl\u00edm si, \u017ee pochopiteln\u011bj\u0161\u00ed je to moje. Funguje to, jak jsem ji\u017e popsal kontrolou jednotliv\u00fdch voz\u00ed\u010dk\u016f, d\u0159\u00edve jen jich. Nyn\u00ed se kontroluje v\u0161e, tedy t\u0159eba i n\u00e1klad a spojen\u00ed vag\u00f3nk\u016f. Je-li v\u00e1\u0161 v\u00fdprav\u010d\u00ed dob\u0159e nastaven, nepust\u00ed k v\u00e1m nic, co by mohlo zap\u0159\u00ed\u010dinit jak\u00fdkoli kolaps. A nepust\u00ed to ani ven, kdyby to n\u00e1hodou vzniklo u v\u00e1s. N\u00e1klad a spojen\u00ed vag\u00f3n\u016f je v praxi \u0159e\u010deno slo\u017eit\u011bj\u0161\u00ed hatmatilkou kontrola paket\u016f, pak stavov\u00fdch filtr\u016f a posl\u00e9ze i aplika\u010dn\u00edch vrstev. Co to je by zabralo knihu. Pro v\u00e1s sta\u010d\u00ed \u017ee je to voz\u00ed\u010dek se \u0161kodliv\u00fdm n\u00e1kladem. Lid\u00e9 pracuj\u00edc\u00ed s t\u00edm v\u00fdprav\u010d\u00edm (firewalem) jsou velice erudovan\u00ed a znal\u00ed. Tak\u00e9 se vzne\u0161en\u011b naz\u00fdvaj\u00ed, nap\u0159\u00edklad senior sales engineer Petr XY.  Kdy\u017e u\u017e nyn\u00ed v\u00edte, co je to ta ohniv\u00e1 st\u011bna (p\u0159esn\u00fd p\u0159eklad slova firewall), tak v\u00e1s i napadne, \u017ee nen\u00ed zrovna ku prosp\u011bchu jej m\u00edt vypnut\u00fd. A tak\u00e9 se nedomn\u00edvejte, \u017ee je v\u0161emocn\u00fd. I ten v\u00fdprav\u010d\u00ed se n\u011bkdy zapomene, a je jedno zda u lahve s alkoholem, nebo u \u017eensk\u00e9. Proto je t\u0159eba m\u00edt u toho samoz\u0159ejm\u011b i n\u011bjak\u00fd ten antivirov\u00fd program. Z t\u011bch dvou se mus\u00ed st\u00e1t kamar\u00e1di, nebo alespo\u0148 nesm\u00ed bojovat proti sob\u011b, Jinak m\u016f\u017ee doj\u00edt ke kolapsu cel\u00e9ho n\u00e1dra\u017e\u00ed. Pardon, va\u0161eho po\u010d\u00edta\u010de.                                                                                                                                                                                                                                                                                                                                                                                          4.7\/5 - (9 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Co d\u011bl\u00e1 firewall","item":"https:\/\/www.s-tap.cz\/co-dela-firewall\/#breadcrumbitem"}]}]