{"id":1259,"date":"2022-12-15T20:26:27","date_gmt":"2022-12-15T20:26:27","guid":{"rendered":"https:\/\/securitybriefing.net\/?p=1259"},"modified":"2022-12-15T20:26:27","modified_gmt":"2022-12-15T20:26:27","slug":"amit-tudnia-kell-az-otthoni-vezetek-nelkuli-utvalasztok-wi-fi-telepitesekor","status":"publish","type":"post","link":"https:\/\/securitybriefing.net\/hu\/technologia-2\/amit-tudnia-kell-az-otthoni-vezetek-nelkuli-utvalasztok-wi-fi-telepitesekor\/","title":{"rendered":"Amit tudnia kell, amikor otthoni vezet\u00e9k n\u00e9lk\u00fcli \u00fatv\u00e1laszt\u00f3kat (Wi-Fi) telep\u00edt"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Egy k\u00f6z\u00f6s von\u00e1s, amely kiemelkedik a Cisco h\u00e1l\u00f3zati \u00fatv\u00e1laszt\u00f3k \u00e9s kapcsol\u00f3k megvitat\u00e1sakor: a h\u00edres Internetwork Operating System (IOS). Ez a hatalmas \u201cmotor\u201d az, ami ezeket az eszk\u00f6z\u00f6ket m\u0171k\u00f6dteti, biztos\u00edtva a sikeres m\u0171k\u00f6d\u00e9s\u00fcket. Ez a cikk els\u0151sorban az iOS-re \u00f6sszpontos\u00edt, \u00e9s elemzi, hogyan lehet manipul\u00e1lni. Miel\u0151tt ez megt\u00f6rt\u00e9nne, szeretn\u00e9m, ha tiszt\u00e1ban lenn\u00e9l az iOS haszn\u00e1latakor alkalmazott k\u00e9t k\u00fcl\u00f6nb\u00f6z\u0151 megk\u00f6zel\u00edt\u00e9ssel: vagy a Parancssori Fel\u00fclet (CLI), vagy a Grafikus Felhaszn\u00e1l\u00f3i Fel\u00fclet (GUI) r\u00e9v\u00e9n.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">A Parancssori Fel\u00fclet (CLI) egy kifinomult m\u00f3dszer az IOS eszk\u00f6z\u00f6k konfigur\u00e1l\u00e1s\u00e1ra. A CLI haszn\u00e1lat\u00e1val pontos parancsokat adhatunk meg, amelyek a k\u00edv\u00e1nt viselked\u00e9st eredm\u00e9nyezik. Ez\u00e1ltal teljes ellen\u0151rz\u00e9st \u00e9s hozz\u00e1f\u00e9r\u00e9st kapunk az \u00fatv\u00e1laszt\u00f3inkhoz vagy kapcsol\u00f3inkhoz.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">A GUI (Grafikus Felhaszn\u00e1l\u00f3i Fel\u00fclet) sokkal felhaszn\u00e1l\u00f3bar\u00e1tabb megk\u00f6zel\u00edt\u00e9st k\u00edn\u00e1l az ilyen eszk\u00f6z\u00f6k kezel\u00e9s\u00e9re. Gyakran t\u00e1maszkodunk r\u00e1, amikor kis h\u00e1l\u00f3zati eszk\u00f6z\u00f6ket, p\u00e9ld\u00e1ul otthoni vezet\u00e9k n\u00e9lk\u00fcli \u00fatv\u00e1laszt\u00f3kat (Wi-Fi) \u00e1ll\u00edtunk be. Ez a r\u00e9sz bemutatja, hogyan f\u00e9rhetnek hozz\u00e1 a felhaszn\u00e1l\u00f3k a Cisco IOS-hoz (15.2 vagy 12.4 verzi\u00f3k) a Parancssori Fel\u00fcleten kereszt\u00fcl a hat\u00e9kony m\u0171k\u00f6d\u00e9s \u00e9rdek\u00e9ben.<\/span><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"introduction-to-the-cli\"><b>Bevezet\u00e9s a CLI-be<\/b><\/h2>\n\n<h3 class=\"wp-block-heading\" id=\"basic-router-configurations\"><b>Alapvet\u0151 \u00fatv\u00e1laszt\u00f3 konfigur\u00e1ci\u00f3k<\/b><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Most itt az ideje, hogy belemer\u00fclj\u00fcnk a cikk izgalmas r\u00e9szeibe, \u00e9s kezdj\u00fck egy Cisco \u00fatv\u00e1laszt\u00f3 be\u00e1ll\u00edt\u00e1s\u00e1val. Tov\u00e1bb\u00e1, haszn\u00e1lni fogunk<\/span>egy h\u00e1l\u00f3zati szimul\u00e1tort a h\u00e1l\u00f3zati k\u00f6rnyezet\u00fcnk l\u00e9trehoz\u00e1s\u00e1hoz<span style=\"font-weight: 400;\">.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Annak \u00e9rdek\u00e9ben, hogy a Cisco \u00fatv\u00e1laszt\u00f3nk m\u0171k\u00f6dj\u00f6n, \u00edme n\u00e9h\u00e1ny kritikus be\u00e1ll\u00edt\u00e1s, amelyet konfigur\u00e1lunk:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><b>Gazdag\u00e9pn\u00e9v:<\/b><span style=\"font-weight: 400;\"> az eszk\u00f6z neve.<\/span><\/li>\n\n\n\n<li><b>Jelszavak:<\/b><span style=\"font-weight: 400;\"> biztons\u00e1gosan titkos\u00edtva vagy ny\u00edlt, titkos\u00edtatlan form\u00e1ban k\u00f6z\u00f6lve.<\/span><\/li>\n\n\n\n<li><b>IP-c\u00edmek:<\/b><span style=\"font-weight: 400;\"> az interf\u00e9szeken bel\u00fcl.<\/span><\/li>\n<\/ul>\n\n\n\n<p><b>T\u00e1voli hozz\u00e1f\u00e9r\u00e9s:<\/b><span style=\"font-weight: 400;\"> k\u00f6nnyen kezelheti h\u00e1l\u00f3zati eszk\u00f6zeit biztons\u00e1gos Telnet vagy SSH kapcsolatokon kereszt\u00fcl.<\/span><\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"a-user-access-levels-in-cisco-ios\"><b>a) Felhaszn\u00e1l\u00f3i hozz\u00e1f\u00e9r\u00e9si szintek a Cisco IOS-ban<\/b><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Biztons\u00e1gi okokb\u00f3l h\u00e1rom hozz\u00e1f\u00e9r\u00e9si szintet fejlesztettek ki, amelyek mindegyik felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra k\u00fcl\u00f6nb\u00f6z\u0151 tev\u00e9kenys\u00e9geket tesznek lehet\u0151v\u00e9.<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\">Ellen\u0151rizze az internetkapcsolat\u00e1t olyan parancsok futtat\u00e1s\u00e1val, mint a ping vagy a traceroute. (&gt;)<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">N\u00e9zzen bele, mi is t\u00f6rt\u00e9nik val\u00f3j\u00e1ban az eszk\u00f6zzel. (#)<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">B\u00e1rmilyen v\u00e1ltoztat\u00e1s elv\u00e9gz\u00e9s\u00e9hez. (config)#<\/span><\/li>\n<\/ol>\n\n\n\n<p><span style=\"font-weight: 400;\">Amikor csatlakozik egy Cisco eszk\u00f6zh\u00f6z, p\u00e9ld\u00e1ul egy \u00fatv\u00e1laszt\u00f3hoz, kapcsol\u00f3hoz vagy t\u0171zfalhoz, felhaszn\u00e1l\u00f3i <\/span><b>v\u00e9grehajt\u00e1si m\u00f3dot kap<\/b><span style=\"font-weight: 400;\"> (&gt;) \u2013 az els\u0151dleges hozz\u00e1f\u00e9r\u00e9si szint. Ezzel a felhaszn\u00e1l\u00f3i v\u00e9grehajt\u00e1si hozz\u00e1f\u00e9r\u00e9si szinttel csak alapvet\u0151 parancsokat hajthat v\u00e9gre, mint p\u00e9ld\u00e1ul a ping \u00e9s a traceroute.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Ahhoz, hogy nagyobb parancsk\u00e9szlethez \u00e9s jogosults\u00e1gokhoz f\u00e9rjen hozz\u00e1, elengedhetetlen a k\u00f6vetkez\u0151 parancs be\u00edr\u00e1sa: Router&gt;enable. Ez lehet\u0151v\u00e9 teszi, hogy feljebb l\u00e9pjen a l\u00e9tr\u00e1n, \u00e9s n\u00f6velje az ir\u00e1ny\u00edt\u00e1si szintj\u00e9t.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">El\u00e9rt\u00fck a m\u00e1sodik hozz\u00e1f\u00e9r\u00e9si szintet: <\/span><b>kiv\u00e1lts\u00e1gi m\u00f3d<\/b><span style=\"font-weight: 400;\"> \u2013 R1#. Itt megfigyelheti az eszk\u00f6zzel v\u00e9gzett \u00f6sszes m\u0171veletet (k\u00fcl\u00f6nb\u00f6z\u0151 show parancsokkal), de nem v\u00e9gezhet v\u00e1ltoztat\u00e1sokat.<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Router&gt;enged\u00e9lyez<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>Router#<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400;\">Az eszk\u00f6z m\u00f3dos\u00edt\u00e1s\u00e1hoz tov\u00e1bbi szintet kell emeln\u00fcnk a hozz\u00e1f\u00e9r\u00e9si szint\u00fcnk\u00f6n \u2013 el\u00e9rve egy parancsnoki szintet, amelyet <\/span><b>glob\u00e1lis konfigur\u00e1ci\u00f3s m\u00f3dnak<\/b><span style=\"font-weight: 400;\">. neveznek. Ez a magasztos st\u00e1tusz nagyobb k\u00e9pess\u00e9geket \u00e9s jogosults\u00e1gokat biztos\u00edt sz\u00e1munkra, mint kor\u00e1bban.<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Router#konfigur\u00e1l termin\u00e1l<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>Router(konfig)#<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400;\">A Cisco eszk\u00f6z glob\u00e1lis konfigur\u00e1ci\u00f3s m\u00f3dj\u00e1nak el\u00e9r\u00e9s\u00e9vel b\u00e1rmilyen k\u00edv\u00e1nt m\u00f3dos\u00edt\u00e1st elv\u00e9gezhet teljes ellen\u0151rz\u00e9ssel \u2013 hasonl\u00f3an a Windows rendszergazdai vagy a Linux root felhaszn\u00e1l\u00f3i hozz\u00e1f\u00e9r\u00e9s\u00e9hez.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Annak \u00e9rdek\u00e9ben, hogy felk\u00e9sz\u00fclt legyen b\u00e1rmilyen kih\u00edv\u00e1sra, \u00edme n\u00e9h\u00e1ny parancs, amelyet er\u0151sen javaslok megismerni: Ha id\u0151t \u00e9s g\u00e9pel\u00e9si er\u0151fesz\u00edt\u00e9st szeretne megtakar\u00edtani, mik\u00f6zben tov\u00e1bbra is biztos\u00edtja a pontoss\u00e1got, t\u00f6k\u00e9letes megold\u00e1sunk van a hosszabb parancsok \u00f6ssze\u00e1ll\u00edt\u00e1s\u00e1ra.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Amikor be\u00edrja az \u201cR1#show run\u201d parancsot, \u00e9s megnyomja a TAB billenty\u0171t, a parancs automatikusan kieg\u00e9sz\u00fcl. Tov\u00e1bb\u00e1, ha k\u00e9rd\u0151jelet (?) \u00edr be, a k\u00f6vetkez\u0151 parancsok megjelennek a k\u00e9perny\u0151n.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/R1-image-1.jpg\" alt=\"R1 k\u00e9p\" class=\"wp-image-1260\" width=\"841\" height=\"434\"\/><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"b-selecting-a-device-name-hostname\"><b>b) Eszk\u00f6zn\u00e9v kiv\u00e1laszt\u00e1sa (Gazdag\u00e9pn\u00e9v)<\/b><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Az \u00fatv\u00e1laszt\u00f3 vagy kapcsol\u00f3 nev\u00e9nek megv\u00e1ltoztat\u00e1s\u00e1hoz csak be kell \u00edrnia ezt a parancsot: (a k\u00f6vetkez\u0151 k\u00e9pen l\u00e1tni fogja)<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Router(konfig)#hosztn\u00e9v ROUTER_N\u00c9V<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>ROUTER_N\u00c9V(konfig)#<\/code><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id=\"c-securing-access-to-the-router\"><b>c) Hozz\u00e1f\u00e9r\u00e9s biztos\u00edt\u00e1sa az \u00fatv\u00e1laszt\u00f3hoz<\/b><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Az \u00fatv\u00e1laszt\u00f3 jogosulatlan hozz\u00e1f\u00e9r\u00e9s elleni v\u00e9delme \u00e9rdek\u00e9ben n\u00e9zz\u00fck meg, hogyan \u00e1ll\u00edthatunk be jelsz\u00f3t a kiv\u00e1lts\u00e1gi m\u00f3dban (#). K\u00f6vesse ezt az egyszer\u0171 folyamatot a feladat elv\u00e9gz\u00e9s\u00e9hez:<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/Securing-access-to-the-router-2-1.jpg\" alt=\"Hozz\u00e1f\u00e9r\u00e9s biztos\u00edt\u00e1sa az \u00fatv\u00e1laszt\u00f3 k\u00e9phez\" class=\"wp-image-1261\" width=\"838\" height=\"254\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>Router(konfig)#hosztn\u00e9v R1<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(config)#enable password cisco vagy<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#enged\u00e9lyez titkos cisco123<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400;\">Ezzel a paranccsal figyelmeztet\u0151 bannert \u00e1ll\u00edt be b\u00e1rki sz\u00e1m\u00e1ra, aki megpr\u00f3b\u00e1l hozz\u00e1f\u00e9rni az eszk\u00f6zh\u00f6z, figyelmeztetve \u0151ket a lehets\u00e9ges k\u00f6vetkezm\u00e9nyekre.<\/span><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#bannermotd \"JOGOSULATLAN HOZZ\u00c1F\u00c9R\u00c9S MEGTAGADVA\"<\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400;\">Ha a k\u00e9rd\u00e9se az \u201cenable password\u201d \u00e9s a \u201csecret enable\u201d k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9gekre vonatkozik, j\u00f3 helyen j\u00e1r. \u00cdme, mi k\u00fcl\u00f6nb\u00f6zteti meg \u0151ket:<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/Unauthorized-access-3-1.jpg\" alt=\"Jogosulatlan hozz\u00e1f\u00e9r\u00e9s k\u00e9p\" class=\"wp-image-1262\" width=\"841\" height=\"453\"\/><\/figure>\n\n\n\n<p><span style=\"font-weight: 400;\">Az egyik konfigur\u00e1ci\u00f3 (#enable secret) k\u00f3dolt, m\u00edg a m\u00e1sik (#enable password) titkos\u00edtatlan marad.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Kezdj\u00fck az \u00fatv\u00e1laszt\u00f3 konfigur\u00e1l\u00e1s\u00e1val a h\u00e1l\u00f3zati hozz\u00e1f\u00e9r\u00e9s (el\u00e9rhet\u0151s\u00e9g) \u00e9rdek\u00e9ben a k\u00f6vetkez\u0151 topol\u00f3gia haszn\u00e1lat\u00e1val:<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/Router-for-network-access-1.jpg\" alt=\"\u00datv\u00e1laszt\u00f3 a h\u00e1l\u00f3zati hozz\u00e1f\u00e9r\u00e9shez k\u00e9p\" class=\"wp-image-1263\" width=\"841\" height=\"421\"\/><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"d-configuring-an-ip-address-on-the-router\"><b>d) IP-c\u00edm konfigur\u00e1l\u00e1sa az \u00fatv\u00e1laszt\u00f3n<\/b><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Az \u00fatv\u00e1laszt\u00f3 egy felbecs\u00fclhetetlen eszk\u00f6z, amely lehet\u0151v\u00e9 teszi, hogy t\u00f6bb h\u00e1l\u00f3zatot z\u00f6kken\u0151mentesen \u00f6sszekapcsoljunk k\u00fcl\u00f6nb\u00f6z\u0151 portokon kereszt\u00fcl, \u00e1ltal\u00e1ban kett\u0151 vagy h\u00e1rom. Egy portot \u00fagy hat\u00e1rozunk meg, mint a fizikai helyet, ahol egy k\u00e1bel csatlakoztathat\u00f3. Ami a megfelel\u0151 logikai oldal\u00e1t illeti, interf\u00e9szk\u00e9nt azonos\u00edtjuk.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">\u00d6sszefoglalva:&nbsp;<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\">Port = Fizikai<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Interf\u00e9sz = Logikai <\/span><\/li>\n<\/ul>\n\n\n\n<p><span style=\"font-weight: 400;\">P\u00e9ld\u00e1ul konfigur\u00e1lunk egy IP (logikai) c\u00edmet az interf\u00e9szen, \u00e9s fizikailag csatlakoztatjuk egy porthoz k\u00e1bellel.<\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Ahhoz, hogy b\u00e1rmilyen kommunik\u00e1ci\u00f3 megt\u00f6rt\u00e9njen a h\u00e1l\u00f3zaton bel\u00fcl, ezeknek az interf\u00e9szeknek IP-c\u00edmmel kell rendelkezni\u00fck, \u00e9s enged\u00e9lyezni kell \u0151ket, vagyis be kell kapcsolni. Ahogy az \u00e1bra mutatja, k\u00f6nnyen konfigur\u00e1lhat IP-c\u00edmet egy h\u00e1l\u00f3zati interf\u00e9szen:<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/IP-address-of-the-router-4-1.jpg\" alt=\"Az \u00fatv\u00e1laszt\u00f3 IP-c\u00edme k\u00e9p\" class=\"wp-image-1264\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#interf\u00e9sz FastEthernet0\/0<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><b>R1(config-if)#ip c\u00edm 192.168.1.1 255.255.255.0<\/b><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig-if)#nincs le\u00e1ll\u00edt\u00e1s<\/code><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id=\"f-configuring-remote-access-on-a-router-telnet-ssh\"><b>f) T\u00e1voli hozz\u00e1f\u00e9r\u00e9s konfigur\u00e1l\u00e1sa egy \u00fatv\u00e1laszt\u00f3n (Telnet, SSH)<\/b><\/h3>\n\n<h2 class=\"wp-block-heading\" id=\"telnet\"><b>Telnet<\/b><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">A h\u00e1l\u00f3zati alkalmaz\u00e1sok biztons\u00e1gos t\u00e1voli kapcsolatokat biztos\u00edtanak h\u00e1l\u00f3zatokhoz, eszk\u00f6z\u00f6kh\u00f6z (p\u00e9ld\u00e1ul \u00fatv\u00e1laszt\u00f3khoz \u00e9s kapcsol\u00f3khoz) vagy szerverekhez. Ez megb\u00edzhat\u00f3 hozz\u00e1f\u00e9r\u00e9st biztos\u00edt b\u00e1rmely helyr\u0151l.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/TELNET-5-1.jpg\" alt=\"TELNET 5 1\" class=\"wp-image-1265\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#vonal vty 0 14<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><b>R1(config-line)#jelsz\u00f3 cisco<\/b><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><b>R1(config-line)#bejelentkez\u00e9s<\/b><\/code><\/pre>\n\n\n\n<p><span style=\"font-weight: 400;\">Kezd\u00e9sk\u00e9nt be kell l\u00e9pn\u00fcnk a virtu\u00e1lis vonalainkba (\u00f6sszesen 15), be kell \u00e1ll\u00edtanunk a jelsz\u00f3t (\u201cCisco\u201d), majd el kell ind\u00edtanunk a Telnet folyamatot #login.<\/span><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"ssh\"><b>SSH<\/b><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">Az SSH az ide\u00e1lis protokoll a helyi h\u00e1l\u00f3zati vagy internetes eszk\u00f6z\u00f6kh\u00f6z val\u00f3 biztons\u00e1gos t\u00e1voli csatlakoz\u00e1shoz. Ennek konfigur\u00e1l\u00e1s\u00e1hoz a Cisco g\u00e9peken bizonyos l\u00e9p\u00e9seket kell tenni:<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\">Szem\u00e9lyes bejelentkez\u00e9s \u00e9s jelsz\u00f3 l\u00e9trehoz\u00e1sa.&nbsp;<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">Domain n\u00e9v l\u00e9trehoz\u00e1sa&nbsp;<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">A maxim\u00e1lis biztons\u00e1g \u00e9rdek\u00e9ben elengedhetetlen a nyilv\u00e1nos \u00e9s priv\u00e1t kulcsp\u00e1rok gener\u00e1l\u00e1sa.<\/span><\/li>\n\n\n\n<li><span style=\"font-weight: 400;\">A virtu\u00e1lis vonalak (vty) folyamat\u00e1nak enged\u00e9lyez\u00e9s\u00e9hez haszn\u00e1lja a parancsot #login local.<\/span><\/li>\n<\/ol>\n\n\n\n<p><span style=\"font-weight: 400;\">Az al\u00e1bbi \u00e1br\u00e1n l\u00e1that\u00f3 egy p\u00e9lda az SSH konfigur\u00e1ci\u00f3j\u00e1ra egy Cisco \u00fatv\u00e1laszt\u00f3n:<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/12\/SSH-image-6-1.jpg\" alt=\"SSH k\u00e9p \" class=\"wp-image-1267\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#felhaszn\u00e1l\u00f3n\u00e9v admin jogosults\u00e1g 15 jelsz\u00f3 admincisco321<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#ip domain-n\u00e9v my.home.lab<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#kriptogr\u00e1fiai kulcs gener\u00e1l rsa modulus 1024<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#ip ssh verzi\u00f3 2<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig)#vonal vty 0 15<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig-vonal)#bejelentkez\u00e9s helyi<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>R1(konfig-vonal)#sz\u00e1ll\u00edt\u00e1si bemenet ssh telnet<\/code><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"to-sum-up\"><b>\u00d6sszefoglalva<\/b><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">Az \u00fatv\u00e1laszt\u00f3 elengedhetetlen<\/span> eszk\u00f6z b\u00e1rmely sz\u00e1m\u00edt\u00f3g\u00e9pes h\u00e1l\u00f3zatban, mert t\u00f6bb h\u00e1l\u00f3zatot \u00f6sszekapcsol. K\u00fcl\u00f6nb\u00f6z\u0151 h\u00e1l\u00f3zati protokollok vannak enged\u00e9lyezve (mint p\u00e9ld\u00e1ul a RIP \u00e9s az OSPF), amelyek seg\u00edtik az \u00f6sszekapcsol\u00e1si folyamatot. Sz\u00e1mos k\u00fcl\u00f6nb\u00f6z\u0151 konfigur\u00e1ci\u00f3t is k\u00edn\u00e1l biztons\u00e1gi c\u00e9lokra (p\u00e9ld\u00e1ul jelszavak a virtu\u00e1lis vonalakon). Ebben a cikkben megtanultuk, hogyan \u00e1ll\u00edtsunk be IP-c\u00edmet az \u00fatv\u00e1laszt\u00f3n, valamint a t\u00e1voli hozz\u00e1f\u00e9r\u00e9st (Telnet \u00e9s SSH). Megtanultuk n\u00e9h\u00e1ny legfontosabb konfigur\u00e1ci\u00f3t is, <span style=\"font-weight: 400;\">amelyet egy h\u00e1l\u00f3zati adminisztr\u00e1tornak ismernie kell.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>One commonality that stands out when discussing Cisco network routers and switches: is the renowned Internetwork Operating System (IOS). This powerful \u201cengine\u201d is what powers all of these devices, ensuring\u2026 <a class=\"more-link\" href=\"https:\/\/securitybriefing.net\/hu\/technologia-2\/amit-tudnia-kell-az-otthoni-vezetek-nelkuli-utvalasztok-wi-fi-telepitesekor\/\">Folytat\u00e1s <span class=\"screen-reader-text\">Amit tudnia kell, amikor otthoni vezet\u00e9k n\u00e9lk\u00fcli \u00fatv\u00e1laszt\u00f3kat (Wi-Fi) telep\u00edt<\/span><\/a><\/p>","protected":false},"author":3,"featured_media":1278,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-1259","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Install Home Wireless Routers (Wi-Fi) properly | securitybriefing.net<\/title>\n<meta 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