O Telnet é um ótimo recurso que podemos utilizar para testar eventuais bloqueios de portas numa rede.

Se por exemplo você estiver com dificuldades em receber e-mails por algum programa como o Outlook, você pode executar este comando no Prompt do MS-DOS para saber se a porta de recebimento de e-mails (110) está bloqueada em sua rede:

 telnet pop.seudomínio.com.br 110

Se a resposta for algo como Connect failed, isso indica que sua rede está bloqueando essa porta, sendo necessário procurar o responsável pela sua rede ou o seu provedor de acesso para verificar a possibilidade de resolver esse problema.

Observação: O mesmo comando pode ser usado para a plataforma linux.

Para usuários do Windows Vista

Por padrão, o Telnet não é instalado com o Windows Vista, para instalá-lo, siga as instruções:

  • Clique em Painel de Controle e em seguida, em Programas ;
  • Clique em Ativar ou Desativar recursos do Windows;
  • A seguir, no item Recursos do Windows marque a opção Cliente Telnet e clique em Ok.


Para usuários do Windows 7

Clique em “Iniciar” (Start), preencha o campo branco com o comando optionalfeatures e você verá a seguinte tela:

Como usar o telnet para testar bloqueios de portas

Desça a barra de rolagem e encontre a opção “TELNET CLIENT”, marque essa ela e clique em OK. Após isso você conseguirá utilizar o telnet normalmente (talvez seja necessário reiniciar o computador)

Atenção: Esta alteração pode solicitar a senha de Administrador ou a Confirmação do Windows (login e senha);

Observação: A instalação pode demorar vários minutos.

Estas são as portas mais comuns que você pode precisar testar via Telnet em caso de problemas:

Porta Serviço


Esse artigo ajudou você?

37 respostas para “Como usar o telnet para testar bloqueios de portas”

  1. Zkittles Autoflowering Feminized Cannabis Seeds

    There’s definately a great deal to know about this subject. I love all of the points you have made.

  2. Emmanuel Freitag

    Having read this I thought it was very enlightening. I appreciate you spending some time and effort to put pasaran bandar togel online this content together. I once again find myself spending way too much time both reading and commenting

  3. free horror

    You ought to take part in a contest for one of the best sites on the internet. I will highly recommend this web site!

  4. accessories

    I was able to find good advice from your blog posts.

  5. Affiliate Training Mike

    Fantastic article! I’ll be back to see your next piece! Thank you!

  6. Alberta Huckabey

    Awseome article, I am a big believer in commenting on blogs and forums to let the blog writers know that they’ve added something of great benefit to the world wide web!

  7. Sammie Cioni

    I’d should consult with you here. Which isn’t something I usually do! I love reading a post which will make people think. Also, thanks for allowing me to comment!

  8. Barrie Payno

    Thanks for sharing the info. I love sucking dick btw hmu

  9. Pretty Gaming

    I’m extremely pleased to uncover this website. I wanted to thank you for ones time due to this fantastic read!! I definitely loved every part of it and i also have you book-marked to look at new things in your blog.

  10. Charlotte NC exterminators

    If you are searching for the greatest pest control company, look no more. These guys are awesome!

  11. Fletcher Lococo

    I totally agree , I absolutely hate the “Hey there, I subscribed to your RSS Feed” type of comments on my blog. HOWEVER I do get a kick out of comment spam that has absolutely no benefit for the guy spamming , broken links , no anchor text ,ect. I guess I should be upset a little more about it , but akismet is so great about catching things any more.

  12. Takako Korpi

    The next time I learn a weblog, I hope that it doesnt disappoint me as a lot as this one. I imply, I know it was my option to learn, however I actually thought youd have something interesting to say. All I hear is a bunch of whining about something that you may fix for those who werent too busy in search of attention.

  13. web

    Magnificent site. Lots of useful info here. I am sending it to several pals ans also sharing in delicious. And obviously, thank you to your effort!

  14. Marc Brodfuehrer

    Throughout the grand scheme of things you secure an A for effort and hard work. Where you lost me personally ended up being on the specifics. As as the maxim goes, the devil is in the details… And it could not be more correct right here. Having said that, permit me inform you what did do the job. Your text is pretty engaging and that is possibly the reason why I am making the effort in order to comment. I do not make it a regular habit of doing that. Second, although I can certainly notice the jumps in reason you make, I am not really confident of how you appear to unite your ideas that help to make the actual final result. For the moment I will yield to your position but trust in the future you link your dots better.

  15. resource

    I just want to say I am just beginner to blogging and site-building and absolutely liked you’re page. Almost certainly I’m planning to bookmark your website . You definitely have perfect stories. With thanks for sharing with us your webpage.

  16. 출장안마

    I must thank you for the efforts you’ve put in writing this site. I’m hoping to check out the same high-grade content by you later on as well. In truth, your creative writing abilities has motivated me to get my very own blog now 😉

  17. master plumber Look At This

    Magnificent goods from you, man. I’ve understand your stuff previous to and you are just extremely fantastic. I really like what you’ve acquired here, really like what you are saying and the way in which you say it. You make it enjoyable and you still care for to keep it smart. I cant wait to read much more from you. This is actually a tremendous web site.

  18. pier and beam foundation repair diy

    I in addition to my guys happened to be reviewing the good recommendations from your web site and then I got a terrible suspicion I had not expressed respect to the blog owner for those secrets. Most of the young boys are actually absolutely glad to study all of them and have now certainly been tapping into those things. I appreciate you for simply being considerably kind and then for getting such fine ideas millions of individuals are really wanting to discover. Our own honest apologies for not saying thanks to you sooner.

  19. VitalFlow Ingredients

    You’ve made some really good points there. I looked on the net for more information about the issue and found most individuals will go along with your views on this web site.

  20. 마사지알바

    Heya, usually are you too great? The writing widens my knowledge. Thank you.

  21. porno

    Hi, Neat post. There is a problem with your web site in internet explorer, would test this… IE still is the market leader and a big portion of people will miss your fantastic writing due to this problem.

  22. pool table relocation

    I used to be suggested this web site by way of my cousin. I’m now not positive whether this publish is written by him as nobody else recognise such distinctive about my trouble. You are incredible! Thanks!

  23. remodel nation

    I think this is among the most important information for me. And i’m glad reading your article. But should remark on some general things, The web site style is ideal, the articles is really great : D. Good job, cheers

  24. White glove delivery

    I do agree with all the concepts you have presented on your post. They’re really convincing and will definitely work. Nonetheless, the posts are too short for starters. Could you please prolong them a bit from subsequent time? Thank you for the post.

  25. digital marketing w farmacji

    I am really enjoying the theme/design of your blog. Do you ever run into any browser compatibility problems? A couple of my blog visitors have complained about my site not operating correctly in Explorer but looks great in Chrome. Do you have any solutions to help fix this issue?

  26. company website

    What i do not understood is if truth be told how you are no longer actually a lot more smartly-preferred than you may be right now. You’re very intelligent. You understand thus considerably on the subject of this topic, made me personally believe it from a lot of numerous angles. Its like men and women don’t seem to be fascinated unless it’s one thing to do with Woman gaga! Your personal stuffs nice. All the time deal with it up!

  27. roadside assistance

    Whats Happening i’m new to this, I stumbled upon this I have discovered It absolutely useful and it has aided me out loads. I am hoping to give a contribution & assist other customers like its helped me. Good job.

  28. alberta car towing

    I was recommended this website by my cousin. I’m not sure whether this post is written by him as nobody else know such detailed about my difficulty. You’re amazing! Thanks!

  29. click to find out more

    I just want to mention I am beginner to blogging and site-building and honestly savored this web site. More than likely I’m going to bookmark your website . You definitely come with awesome well written articles. Thanks for sharing your web site.

  30. find out

    One thing is one of the most prevalent incentives for utilizing your credit card is a cash-back or rebate provision. Generally, you’re going to get 1-5 back on various acquisitions. Depending on the credit cards, you may get 1 back on most expenditures, and 5 in return on acquisitions made in convenience stores, gasoline stations, grocery stores plus ‘member merchants’.

  31. Gregory Rochlin

    I simply want to mention I am newbie to weblog and absolutely enjoyed you’re blog. More than likely I’m want to bookmark your blog post . You surely come with outstanding posts. Appreciate it for sharing with us your website page.


Comente sobre este conteúdo! Escreva o que pensa, complemente, vamos discutir. O conhecimento é livre!