Firewall com UFW no Linux

O que é firewall?

[{"selector":"#anim-934fc482-2a8c-416f-a91d-8c67e6cffef7 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(31.6960590531856%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-3fec12dd-8054-4d17-b51f-8bf31ef55356","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-295d14cd-e369-4e51-b727-aa6b11ff1aae","keyframes":{"transform":["translate3d(-115.2381%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-3586837c-3a5e-4f78-a07c-bd1f4fb50720","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1220b110-6714-4970-8baf-d3afc55b803d","keyframes":{"transform":["translate3d(-119.73685%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2d71d4a0-9f24-48d2-a07e-cb0bc4bedc97","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-03ace46e-b6eb-4e1d-95b9-749bd020a922","keyframes":{"transform":["translate3d(115.23810%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-84ca4388-7584-40d2-9987-7c30f9826135","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-34133ac0-e7b9-4b82-9c3a-ac3b330143a7","keyframes":{"transform":["translate3d(115.78947%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Saiba mais

A palavra firewall, além disso, significa "parede de fogo", ou "muro de fogo".

[{"selector":"#anim-619f86e3-29aa-49cf-91a5-4bacbc83883e","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5e4770eb-c90f-4aa0-83e1-b61883027ecc","keyframes":{"transform":["translate3d(-115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-36921095-41e8-402f-a8c5-011f847e8969","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4364d987-49f4-41b9-b5e2-024f468e20a4","keyframes":{"transform":["translate3d(-119.73685%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-52c84a75-4cc5-42b8-96c8-169b047efb86","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e5126710-7a39-4d92-9f26-c36391fb72b7","keyframes":{"transform":["translate3d(115.23810%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-012e3a6d-65f8-4a57-a344-942cb0a18b95","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-00cf60ed-5728-4c9b-a62a-5708618ca0cd","keyframes":{"transform":["translate3d(115.78947%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Saiba mais

O firewall pode filtrar todo o tráfego de rede em uma máquina, e então decidir o que pode ou não entrar e/ou sair, visando proteger o ambiente em questão.

[{"selector":"#anim-875f6800-2261-4107-90c6-33f613e536f3","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f9be80cc-6462-4e28-bf15-847361c398ad","keyframes":{"transform":["translate3d(-115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6b35ec26-ec25-4a23-98b2-060c002bf7d1","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ea7abf58-d49c-41f0-b343-4bab247e3ed4","keyframes":{"transform":["translate3d(-119.73685%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b77660f1-b60a-4daa-a9d2-fe56a26e6950 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(0, 24.093264248704667%, 0)","translate3d(0, 0%, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Saiba mais

E o UFW, o que ele é?

[{"selector":"#anim-f2ed7fde-d088-47d6-a128-4292343d570e","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-98aa1dd4-fb14-4844-9ee0-91dc3752f36e","keyframes":{"transform":["translate3d(115.23810%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6fc21b9f-6776-4184-8f69-e086ea353a58","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-babf09ec-964b-43d5-8a93-0c26e24a8060","keyframes":{"transform":["translate3d(115.78947%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2fbfb953-2172-478e-b04c-0318f1098a93 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-28542eea-10c5-40e5-b2ad-883a2b17f9cf","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4bf855ed-cc54-4902-b6d7-032c80e7b642","keyframes":{"transform":["translate3d(-115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6f67e290-f6c7-45a8-b59a-54638c58a9a5","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a7065a5e-0067-485f-a146-370faedc0e26","keyframes":{"transform":["translate3d(-119.73685%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Saiba mais

O UFW (Uncomplicated Firewall, ou Firewall Descomplicado) é um frontend para o famoso iptables.

[{"selector":"#anim-83c9effb-21ec-4e09-b59d-321ac143666f","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-11cbdc3c-3196-407e-bd59-733fa8b7809d","keyframes":{"transform":["translate3d(115.23810%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-18d2e8a2-2991-4b09-8874-79d77939f7db","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2dd8f7c0-7aba-4ea2-9600-e9c607a0d4c6","keyframes":{"transform":["translate3d(115.46052%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0787b8ef-85a2-4f08-8bc7-59a4572cba3b [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(28.345594285900226%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-188544f4-f2e2-4987-9341-14e7c0ee3386","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f270339d-0ea5-41d1-acb8-0c4363009871","keyframes":{"transform":["translate3d(-115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-aa948c88-4f75-4d0a-a990-8d0d93d24536","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-badcf401-7df4-4b77-8d80-2788c10471b3","keyframes":{"transform":["translate3d(-119.73685%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Saiba mais

Além de políticas padrão, o UFW pode trabalhar com várias regras:

[{"selector":"#anim-3991af2b-353f-4a2d-a043-2f55457a0afd","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b4d932d1-d69e-41fa-8f5b-c142f62f716f","keyframes":{"transform":["translate3d(115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-37723bea-c34c-44b3-8704-231d1dc9f7f7","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-28b7adf8-2879-472c-852a-a92b496be426","keyframes":{"transform":["translate3d(115.46052%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b3529751-b236-4374-823e-e884e297c2b9","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-cd5bb625-fc51-4879-bd1a-ee92f70a7fc1","keyframes":{"transform":["translate3d(-115.2381%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-195c01f0-060f-4dd7-b4e1-184db06732a5","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-213b45fc-8690-4c9a-96a6-ee5fb6bc6afd","keyframes":{"transform":["translate3d(-120.0658%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Saiba mais

O UFW também possui suporte a logging (com diversos níveis).

[{"selector":"#anim-ae769c5c-4ec9-46ca-b64e-f9b4caaeca08","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a43cb26e-c776-404e-b747-db8331a40048","keyframes":{"transform":["translate3d(-115.2381%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0ae769b4-b5e2-4b93-bb97-1071fc4a1285","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-112b4eca-cba9-40c3-96a3-e0f17a92bec6","keyframes":{"transform":["translate3d(115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1d1e8e38-4087-48f3-acf6-63d51acf5749","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9ca409f9-50c9-476a-880e-8e82b93f8413","keyframes":{"transform":["translate3d(-120.0658%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6b254bda-f6e5-4720-845e-33e6e26561b0","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-66921b4a-091f-4d2a-9257-47813b85bc53","keyframes":{"transform":["translate3d(115.46052%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0740a058-d12e-4008-a1c0-aa16c4a70159 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(31.22961945131945%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Saiba mais

E nós preparamos um GUIA completo e GRATUITO!

[{"selector":"#anim-12b26507-9aa8-412d-ad15-3ef9390216f6","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-2101688b-5287-40a9-b696-d4f8c1710029","keyframes":{"transform":["translate3d(-115.2381%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-62ed37d3-402c-42b6-94d1-f2246c67cab1","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-e7187690-d2f0-4b50-bd71-a674b1c1cf45","keyframes":{"transform":["translate3d(114.28571%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-38a78529-6e4d-4c8f-ab3e-47a87ac2e7a4","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-29e62435-d1c3-4542-957f-5b7d3087b7a9","keyframes":{"transform":["translate3d(-120.0658%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a9b9b5c5-1dcb-4a84-9a35-72070d3a5291 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(31.240568296631277%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-44a6d855-8113-45bd-a521-b9f0928e38f8","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1146615c-6295-4d60-ba52-a738492c5a9a","keyframes":{"transform":["translate3d(114.28571%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b37fe0ed-735f-4f9d-920f-5aea91ef1c8e","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-28729522-50ae-4c25-8d2e-f0188496b67a","keyframes":{"transform":["translate3d(147.31182%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}]

E para mais GUIAS, artigos e materiais relacionados ao Linux, acesse o blog:

[{"selector":"#anim-402183cd-c7fc-4de6-8c2a-305554910509","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a5c9e118-16ec-420f-a24f-c265cd664dd8","keyframes":{"transform":["translate3d(115.55555%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6c8a6ff7-02bc-4941-bcc7-7794b3b8bde7","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-45e9c51c-9b39-48da-8ea8-34f7470cb9da","keyframes":{"transform":["translate3d(115.46052%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-60899c8d-dc6e-48fa-a333-466ea2149925 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(28.90624987200394%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-839e5978-930e-4236-a0a9-6d5e06919d3f","keyframes":{"transform":["scale(1)","scale(1.28)","scale(0.972)","scale(1)"],"offset":[0,0.33,0.66,1]},"delay":0,"duration":1000,"easing":"ease-in-out","fill":"both","iterations":5}] Seta rabiscada TecLinux

Firewall com UFW no Linux

GUIA PARA INICIANTES

O que é firewall?

Firewall é um importante elemento de segurança em tecnologia da informação.

A palavra firewall, além disso, significa "parede de fogo", ou "muro de fogo".

Trata-se de uma barreira de segurança entre a internet e uma rede interna, privada (incluindo computadores).

O firewall pode filtrar todo o tráfego de rede em uma máquina, e então decidir o que pode ou não entrar e/ou sair, visando proteger o ambiente em questão.

E o UFW, o que ele é?

Bem, o UFW é um tipo de firewall, instalado por padrão no Ubuntu.

O UFW (Uncomplicated Firewall, ou Firewall Descomplicado) é um frontend para o famoso iptables.

Trata-se de um firewall de fácil uso, muito apropriado ao usuário iniciante.

Além de políticas padrão, o UFW pode trabalhar com várias regras:

- Serviços - Portas e protocolos - IPs Além de perfis de aplicações.

O UFW também possui suporte a logging (com diversos níveis).

Trata-se de um firewall AMIGÁVEL e PODEROSO.

E nós preparamos um GUIA completo e GRATUITO!

Acesse

E para mais GUIAS, artigos e materiais relacionados ao Linux, acesse o blog: