{"id":65679,"date":"2026-07-29T09:45:00","date_gmt":"2026-07-29T09:45:00","guid":{"rendered":"https:\/\/www.apen.es\/?p=65679"},"modified":"2026-07-29T09:45:01","modified_gmt":"2026-07-29T09:45:01","slug":"disposicio-de-firewalls-en-una-empresa-guia-completa","status":"publish","type":"post","link":"https:\/\/www.apen.es\/ca\/blog\/disposicion-de-firewalls-en-una-empresa-guia-completa\/","title":{"rendered":"Disposici\u00f3 de tallafocs en una empresa: guia completa"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Protegir la xarxa d&#039;una empresa no es limita a instal\u00b7lar un \u00fanic tallafoc i oblidar-se&#039;n. La disposici\u00f3 de tallafocs en una empresa (\u00e9s a dir, on es col\u00b7loquen, quants es necessiten i com es configuren) determina en gran mesura el nivell de protecci\u00f3 real que pot assolir l&#039;organitzaci\u00f3. En aquest article expliquem els criteris clau per dissenyar una arquitectura de seguretat perimetral efica\u00e7.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu\u00e8 \u00e9s un firewall i quina \u00e9s la seva funci\u00f3 a la xarxa empresarial?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un tallafocs \u00e9s un sistema de seguretat que controla el tr\u00e0nsit de xarxa entrant i sortint segons un conjunt de regles predefinides. La seva principal funci\u00f3 \u00e9s actuar com a barrera entre la xarxa interna de l&#039;empresa i Internet, permetent \u00fanicament les comunicacions autoritzades i bloquejant les que puguin suposar un risc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No obstant aix\u00f2, els tallafocs moderns van molt m\u00e9s enll\u00e0 del filtratge de ports i protocols. Els tallafocs de nova generaci\u00f3 (NGFW) integren inspecci\u00f3 profunda de paquets, detecci\u00f3 d&#039;intrusions, control d&#039;aplicacions i filtratge de continguts, oferint una protecci\u00f3 molt m\u00e9s completa davant les amenaces actuals.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tipus de tallafocs i el seu impacte en la disposici\u00f3 de tallafocs en una empresa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Abans de definir la disposici\u00f3 de tallafocs en una empresa, conv\u00e9 con\u00e8ixer els principals tipus disponibles. Els tallafocs de filtratge de paquets analitzen les cap\u00e7aleres dels paquets de dades i apliquen regles b\u00e0siques d&#039;acceptaci\u00f3 o rebuig. D&#039;altra banda, els d&#039;inspecci\u00f3 amb estat tenen en compte el context de les connexions actives, cosa que els fa m\u00e9s efica\u00e7os davant d&#039;atacs sofisticats.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Els firewalls d&#039;aplicaci\u00f3 o servidor intermediari actuen com a intermediaris entre el client i el servidor, inspeccionant el contingut de les comunicacions a nivell d&#039;aplicaci\u00f3. Finalment, els de nova generaci\u00f3 combinen totes aquestes capacitats amb funcions avan\u00e7ades com ara la detecci\u00f3 d&#039;amenaces en temps real.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">On col\u00b7locar-los<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La ubicaci\u00f3 dins de larquitectura de xarxa \u00e9s fonamental per garantir una protecci\u00f3 efica\u00e7. A la majoria de les empreses, la disposici\u00f3 b\u00e0sica inclou un firewall perimetral situat entre Internet i la xarxa corporativa, que actua com a primera l\u00ednia de defensa filtrant el tr\u00e0nsit extern.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No obstant aix\u00f2, una disposici\u00f3 de tallafocs en una empresa m\u00e9s robusta contempla tamb\u00e9 la segmentaci\u00f3 interna de la xarxa mitjan\u00e7ant tallafocs interns o zones DMZ. La zona desmilitaritzada (DMZ) \u00e9s un segment de xarxa intermedi on s&#039;ubiquen els servidors que necessiten ser accessibles des d&#039;Internet \u2014com a servidors web o de correu\u2014 sense estar directament exposats a la xarxa interna. D&#039;aquesta manera, encara que un servidor de la DMZ sigui comprom\u00e8s, l&#039;atacant no accedeix autom\u00e0ticament a la resta de la xarxa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quina difer\u00e8ncia hi ha entre implantar la norma i certificar-se?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Implantar-la significa aplicar els seus requisits a l&#039;organitzaci\u00f3. Certificar-se significa que un organisme de certificaci\u00f3 independent audita el sistema i verifica que compleix tots els requisits, emetent un certificat amb validesa de tres anys subjecte a auditories de seguiment anuals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per aix\u00f2, una empresa pot implantar la norma sense certificar-se i obtenir-ne igualment els beneficis operatius i de gesti\u00f3 que aporta. La certificaci\u00f3 afegeix a m\u00e9s un reconeixement extern que refor\u00e7a la confian\u00e7a de clients i socis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quants tallafocs necessita una empresa?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No hi ha una resposta \u00fanica. El nombre necessari dep\u00e8n de la mida de l&#039;empresa, la complexitat de la xarxa, el tipus d&#039;informaci\u00f3 que gestiona i el nivell d&#039;exposici\u00f3 al risc. En conseq\u00fc\u00e8ncia, la disposici\u00f3 de tallafocs en una empresa petita es pot resoldre amb un \u00fanic dispositiu ben configurat, mentre que una organitzaci\u00f3 mitjana o gran necessitar\u00e0 una arquitectura multicapa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En general, es recomana considerar almenys els punts de control seg\u00fcents: el per\u00edmetre entre Internet i la xarxa corporativa, l&#039;acc\u00e9s a zones sensibles com a servidors de bases de dades o sistemes de producci\u00f3, i les connexions d&#039;acc\u00e9s remot mitjan\u00e7ant VPN.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Disposici\u00f3 de tallafocs en una empresa amb entorns cloud<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Amb l&#039;adopci\u00f3 massiva de serveis cloud, la disposici\u00f3 de tallafocs en una empresa ha evolucionat significativament. Ja no n&#039;hi ha prou de protegir el per\u00edmetre f\u00edsic de la xarxa: tamb\u00e9 cal controlar el tr\u00e0nsit cap ai des dels serveis cloud que utilitza l&#039;organitzaci\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Per aix\u00f2, moltes empreses complementen el firewall perimetral amb solucions de seguretat cloud que protegeixen l&#039;acc\u00e9s a aplicacions SaaS, controlen les connexions dels usuaris remots i apliquen pol\u00edtiques de seguretat consistents independentment d&#039;on es trobi l&#039;usuari o les dades.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Configuraci\u00f3 i manteniment: claus per a una protecci\u00f3 efica\u00e7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Una disposici\u00f3 de tallafocs en una empresa ben dissenyada pot resultar inefica\u00e7 si el dispositiu est\u00e0 mal configurat. Per tant, la configuraci\u00f3 inicial l&#039;ha de fer un especialista que conegui l&#039;arquitectura de xarxa i les necessitats de cada organitzaci\u00f3. Aix\u00ed mateix, el manteniment peri\u00f2dic \u00e9s imprescindible: les regles s&#039;han de revisar regularment, s&#039;ha d&#039;actualitzar el microprogramari i s&#039;han d&#039;analitzar els registres d&#039;activitat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segons <a href=\"https:\/\/www.incibe.es\/\" target=\"_blank\" rel=\"noreferrer noopener\">INCEB<\/a>, mantenir actualitzats els sistemes de protecci\u00f3 perimetral i revisar-ne peri\u00f2dicament la configuraci\u00f3 \u00e9s una de les mesures m\u00e9s eficaces per reduir el risc de patir un incident de ciberseguretat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/www.apen.es\/ca\/ciberseguretat\/perimetral\/\">Apen<\/a> oferim un servei integral d&#039;implantaci\u00f3 i gesti\u00f3 de tallafocs. Inclou el disseny de l&#039;arquitectura de xarxa, la configuraci\u00f3 del dispositiu, el monitoratge continu i el manteniment preventiu. Si vols saber com millorar la disposici\u00f3 de firewalls a la teva empresa, truca&#039;ns al <a href=\"tel:938606220\">938 606 220<\/a> o consulta els nostres <a href=\"https:\/\/www.apen.es\/ca\/ciberseguretat\/\">serveis de ciberseguretat<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preguntes freq\u00fcents<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Quins factors determinen la disposici\u00f3 de tallafocs en una empresa?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">El nombre de dispositius, la complexitat de la xarxa, el volum de tr\u00e0nsit i el nivell dexposici\u00f3 al risc s\u00f3n els factors principals. Una empresa amb m\u00faltiples seus o entorns clouds necessitar\u00e0 una disposici\u00f3 m\u00e9s complexa que un negoci amb una \u00fanica oficina.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">La disposici\u00f3 de tallafocs en una empresa ha d&#039;incloure tallafocs interns?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En arquitectures robustes, s\u00ed. A m\u00e9s del tallafoc perimetral, es recomana segmentar la xarxa interna amb tallafocs addicionals. Aquests protegeixen zones sensibles com a servidors de bases de dades o sistemes de producci\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qu\u00e8 passa si la disposici\u00f3 de tallafocs en una empresa \u00e9s insuficient?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La norma exigeix designar rols i responsabilitats clares, normalment a trav\u00e9s d&#039;un responsable de seguretat de la informaci\u00f3, encara que el comprom\u00eds ha d&#039;implicar tota l&#039;organitzaci\u00f3, inclosa la direcci\u00f3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qu\u00e8 passa si una empresa certificada pateix un incident de seguretat?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00ed. A m\u00e9s del per\u00edmetre f\u00edsic, cal controlar el tr\u00e0nsit cap ai des dels serveis cloud. Aix\u00f2 implica complementar el tallafoc tradicional amb solucions de seguretat espec\u00edfiques per a entorns SaaS i d&#039;acc\u00e9s remot.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Com saber si la disposici\u00f3 de tallafocs a la meva empresa \u00e9s adequada?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La forma m\u00e9s fiable \u00e9s fer una auditoria de seguretat perimetral. Aquesta avalua l&#039;arquitectura actual, identifica punts febles i proposa millores concretes. A Apen realitzem aquesta an\u00e0lisi de forma gratu\u00efta i sense comprom\u00eds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Proteger la red de una empresa no se limita a instalar un \u00fanico firewall y olvidarse. La disposici\u00f3n de firewalls&#8230;<\/p>","protected":false},"author":17,"featured_media":65681,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[836],"tags":[263,1004,1006,1008,1007,1005],"class_list":["post-65679","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciberseguridad","tag-ciberseguridad","tag-ciberseguridad-empresarial","tag-firewall-empresarial","tag-ngfw","tag-proteccion-de-red","tag-seguridad-perimetral"],"acf":[],"yoast_head":"<!-- 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