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Muitos dos clientes dos sistemas VoIP em geral, não só os que estão na minha rede, geralmente encontram um problema em usar soluções mais baratas ou mais versáteis que as oferecidas pelas grandes redes. Essa dificuldade reside em que a rigor o sistema SIP e outros sistemas VoIP usam vários caminhos na rede para completar sua função, e alguns deles além de serem bloqueados por padrão em modems e routers, podem também ser bloqueados por operadoras.
A solução mais simples e rápida encontrada é utilizar os sistemas dos IMs dos grandes portais que tem recursos de voz e vídeo, e também recursos de telefonia alguns. Baseado no fato de que eles não exigem grandes conhecimentos dos usuários e são formatos proprietários, a concorrência é mais complicada e a disponibilidade mais rara, e portanto são mais caros.
A segunda solução, menos simples, e menos rápida, é configurar o modem ou router de acordo com instruções que nem sempre o usuário vá entender e por consequência nem sempre estará preparado para ajustar sozinho se algo estiver diferente ou a necessidade for diferente.
Nessas duas soluções, ainda existe a possibilidade de não se conseguir o resultado desejado por que se o problema não for com o Router ou Modem e sim com a operadora de Banda Larga bloqueando ou segmentando o tráfego de voz e vídeo, não adiantará nem uma das duas soluções.
Nos dois casos ainda há a questão de que a qualidade do serviço é inconstante e usar VoIP sob o firewall dos modems e routers atuais nem sempre é 100% confiável.
Uma terceira solução, que se bem feita pode resolver todos os problemas é a VPN. Pouco conhecida entre os usuários domésticos em detalhes, VPN vem de Virtual Private Network, ou rede privada virtual. VPNs são usadas por empresas e orgãos públicos por seu alto nível de segurança e confiabilidade, e o conceito é fazer com que máquinas conectadas em grandes redes, como a Internet, se comportem como se estivessem ligadas diretamente numa mesma rede local.
Em conceito, a VPN é complexa e tem centenas de utilidades fora desbloquear e agilizar o acesso a recursos remotos, mas o escopo deste artigo é somente essa função. Como a VPN é uma conexão “sempre viva” entre as duas máquinas, ela não necessitará portas abertas na sua máquina a espera de conexão, e uma vez estabelecida a VPN, nenhuma máquina fora dela pode filtrar ou controlar o trafego de informação. É possível monitorar o volume de tráfego e isso pode ser objeto de bloqueio pelos operadores de banda larga doméstica, mas até então, o uso doméstico também não vai gerar suficiente peso para tanto.
Mas o mais importante da VPN é que uma vez integrado na VPN, seu computador pode acessar qualquer porta e qualquer serviço disponível entre os computadores da VPN sem restrições externas, somente as restrições do administrador da VPN em si. Como o computador pode controlar qual rota utilizar para qual recurso de rede, uma VPN simples que não toma conta de todo o tráfego de rede pode ser usada para acessar recursos específicos, e pode ser usada para ligar seu computador a um PBX VoIP e permitir todos os recursos que seriam possíveis se sua máquina estivesse fisicamente onde está o PBX VoIP.
Se você quer usar uma solução VoIP financeiramente mais viável, mas você percebe que não conecta, ou conecta mas não tem som, ou um dos dois pontos ouve mas não fala, depois de tentar abrir as portas no modem ou router e continuar tendo o problema, VPN pode ser uma solução. Para aqueles que não querem ou sabem configurar modems e routers, pode-se usar a VPN como alternativa simples.
Há provedores públicos de VPN, seja gratuito ou pago, mas também soluções gratuitas e pagas para criar VPNs. Existem porém prós e contras:
- Pró: VPN permite acesso irrestrito e direto a recursos presentes na rede VPN;
- Contra: Por essa mesma particularidade, é necessário ter uma VPN confiável;
- Pró: VPN é uma conexão “sempre viva” e por isso mais eficiente e confiável;
- Conta: VPN será reconhecida no seu computar como uma conexão confiável e portanto procurará recursos nela primeiro;
- Pró: VPN pode ser configurada para afunilar todo o tráfego por poucas portas, evitando necessitar de portas desbloqueadas, e pode ser configurada para usar portas diferentes para tarefas que na Internet são fixas;
- Contra: O administrador da VPN pode abrir portas na VPN sem precisar confirmar no seu computador;
No fim das contas, como outros serviços de Internet, e como na vida real, usando VPN você precisa encontrar um administrador confiável e competente, ou ser você mesmo seu administrador e arcar com os custos, que podem ser desde uns poucos dólares por mês até milhares de dólares, dependendo de o que fazer com a VPN.
O importante desde artigo é mostrar que bloqueios, não saber sobre redes, ou complexidade do sistema VoIP, não são barreiras instransponóveis para a utilização doméstica do VoIP. Como em todas as áreas, o único fator determinante para isso é a confiabilidade do profissional encarregado de solucionar o seu problema.
When all this “social” use of computers started to stryke the public, it was a simple text based service which could deliver up to 256 characters per message in real-time. This system evolved in a couple years to more characters per message, adopted better security and services, and added a layer of scalability. Long time after there were better ways to communicate online, even when there were voice clients, the primitive IRC stood boldly against its more developed similars. Why would be that ? If you cant believe, or cant understand, you arent alone. Hundreds of business man doesnt know or understand either, and it would concern to their jobs.
Lets take some examples of today: The MMORPG that makes people go woow ! and the Virtual World using downloadable client that you know in a second after you hear their name in your life. I am being obnoxious just to now write down their names and get someone asking me about what I said. So I say nothing and you readers that are thinking I am talking about them, but I maybe, or maybe not.
Well, the MMORPG and its 2 closest competitors never reached the number of concurrent users (which is the bigger number of users connected in a given moment) that previous and less advanced MMORPGs did, and some still do. If we take into consideration the number of computers per home before 2000 and the numbers of today, the ratio of people playing text based online RPGs are even bigger than the biggest score of todays 3d all full of bouncy featured exquisit female chars and strapping male chars running around in revealing clothes in a game designed arguably for adults but so worried in atracting tenage players which sometimes can barely be qualified as such.
The second is the virtual world (lol, that fitted really nice), which features some of the “somehow” advanced 3d rendering, which is thought to be the best just because it was the first to be public and well connected to right people from the start, allegedly letting people create its contents. For some time it was really the idea, all other ideas were in fact true. Although it is still quite a impressive work of development, it isnt nothing that people are avoiding to be in virtual worlds made in flash and embedded in your given most famous social network of the momento. Before it was one, now it is another, but still, have the same flash based “kind of” MMORPGs and “kind of” Virtual Worlds.
But what happens to these virtual worlds and MMORPGs today, and with many other Internet games and general entertainment, as well as TV shows and movies ? What makes so many people choose the “not best” choice over the all worked up stuff ? Why so many people still prefeer to see Star Trek the Original Series and not these fancy new SciFi series ? Why someone prefer to click over 2d pictures loosely resembling human forms, plants, fruits, furniture and so on, instead of a 3d fully featured virtual world or a complete 3d game universe where you can be a hero ?
The answer is very simple but it seems that people there arent really getting it. The more you want, the less you get. The more you skill up, the more you will seem complex. And the more you try to satisfy everyone, less people you will satisfy.
The two cases of the Virtual World and the MMORPG are similar and quite simple. Long ago, having fun in computers were something reserved for two kinds of people: The ones very skilled that had more fun in it, and the problematic people who had no choice. Either way, it was required knowledge and experience. It has been from long ago since IT industry has dumbed down computers to place it as central piece of everydays homes. It still required a lot of skill to actually get what you want, work or personally, from a computer, but some time ago, you needed to know how to make a computer software to be able to use one.
These times are long gone, and a child, (or sometimes even adult) that barely knows how to write, uses computers. That is kind of good, for people, but is kind of bad, for business. Now there are so many people using computers, the Internet, that business face an ample crowd to pick their customers from, and that leads to miscalculations. One of them, killing both the VW and the MMORPG is the persue of two oposite crowds. While both try to maintain their original older and skilled crowd from long ago, they also try to attract kids, and people who doesnt know how to use computers or the same “rituals” and “costumes” of the “old guard”. I, myself, used to play Pen&Paper RPGs and roll dices instead of mouse wheels. Although I dont care about the people surrounding me talking about politics or sport while playing an RPG, I would feel more comfortable with people taking the game as I do. But I am not the only one, nor the extreme one, as I have seen in these almost 5 years many people stop playing because of the wrong crowds MMORPGs were attracting. The exact same thing happened with the Virtual World, where people tired of having their service disrupted by griefers and kids, misused as a plataform for troubled people vomit their existencial problems, it is better to use a less advanced channel which even if it is full of the same problems, it is less annoying exactly because you know you cant have much from it.
And what starts to happen is that big companies of the online multi-client universes, be it a game or not, are getting lots of new users each day dropping out after a week, and the old users from years seeking other ways, usually less “modern” but not full of the people they dont like, and numbers still showing what they showed before, just like when the last world crisis hit the market. One day they realize that numbers arent all that they thing, and sometimes less can be more.
That is what business man have to have in mind, you cant please God and Mammon at the same time. If you are big enough to make 2 or more things to specific publics, it is better to try to accomodate all your audience with one big “do all” environment.
I am talking about this in a way people will assume I find it bad. It is not bad at all. One of the things these mistakes make is to promote the open-source free ideal. People are starting to realize that big packed solutions ready made for all purposes are just not enough, and demanding personalized services and directed marketing and support. This means we are taking the road to a “open source” future, instead of the restrictive privatization of ideas. I am not against someone earning money from his idea, I just think that someone who has a better implementation of the idea shouldnt be bounded by the fact that someone “did it first”. How many people around have worked in an idea for months, years, and then someone goes there and make a crappy version of that idea, register it, and prevents the world to have a better invention ?
That is what people demand from their governments, from their bosses, and generally from anyone whose power over your free will exists, to aknowledge your personality among the groups and to do something besides what “all will accept”. Luckly people are starting to realise that there arent gigantic lines of production that can make personalized itens, so they are starting to demand customization as something obligatory. This brings the scene we have today, where many huge corporations try to delegate their support and sales to smaller companies, closer to the customers and more flexible to produce personlized items.
That is the word of success in our time: Customization. Customers want the feeling that one specific product was made for them and even if it is not the top of the tops, it still attractive because it gives a sensation no technology gives: The certanty that the business took the time to care about the customer needs rather than offering something for everyone and who cares who buys, as long as many people buy it.
In this article, the author talks about captchas and their “vulnerability”. Well, in my opinion he is partialy right, but also wrong in many aspects.
First of all, where he is right: If automated systems can answer your captchas more than 1% of the time, and numbers in some cases goes as high as 90%, it isnt much of a protection. So the extremelly annoying captchas arent backing their annoyance in their effectiveness. How many times you have to change images because they are too confusing for human eyes, and sometimes even give up. However, better automated systems can easier pick the letters than humans, defeating the purpose of such tool. If this is the ONLY mechanism in place for avoiding automated submission of forms, it isnt much of use. I agree, it must be scrapped because it doesnt do much.
Where he is wrong: Many of the major webmasters from big companies and corporations in fact use a captcha as means to defeat low skilled attacks, as it would be to put a sign “Authorized Personel Only” in a door. It doesnt prevent people to going in that door, but decrease the stress over the security team inside the door discouraging less bold people to do so. As the Blizzard person answered, captchas are just the first layer of security.
When people are talking about security, there will be aways “too muchs” and “too lows” around, because security is all about what can happen, not about what has happened. Capitchas are among the things that will never be unbeatable, preciselly because we live in a time where computers can see microbs, stars, molecules which human eye cant see, and to avoid image processing by automated agents to be effective, it would needed to be avoiding human eye to be effective aswell.
This is a fight where you need to deploy the same big guns as your enemy, which are computers. You really wont need captchas, or use them as just a first line, if you have an AI running the controls and screening all automated systems. It would be very simple to a machine to see what it would do, and block anyone who does the same. I saw wonders of AI in present days, but none can beat the uncertanty of human soul, and the key to have a good security against automated web attackers is just understand that.
BTW, I must admit, while I agree with what Blizzard person spoke about it, the facts prove them otherwise, as any players of World of Warcraft would see, at some periods of the day, there are more bots in Stormwind and Orgrimmar than players.
