[ENG] [ESP] Oscam cache and fake cw

[ENG]

Hi everyone!. Good night. I’ve been seeking information on the Internet about OSCAM and I am wondering a couple of stuffs:

Due to the fact that the security of CAM has been improve so "the owner of the tv platform" could avoid illegal sharing of their keys, I was thinking about the idea of building a cache server so I can work with two receivers with load balancing. In this case, if one line doesn’t answer, the second one will answer. However, I’ve been working in this idea. I tried to configure my server so my OSCAM server could share the ECM that it receives from the readers instead of asking to the readers all the time. I have fifth teen different readers.

QUESTION Nº 1: Is necessary to activate CacheEx so my receivers can retrieve the keys from my OSCAM server?.

I’ve been reading a lot in other forums but I’m still trying to understand it. If I don’t activate CacheEx, the receivers will ask directly to the readers, and subsequently the OSCAM status page will display something like “cache found in (800ms)”. So my second question is:

QUESTION Nº2: What is the difference between ECM and EMM?.

Moreover, I had had a lot of NOKs. As far as I can remember between 4 and 7 %. Also, I had had a lot of timeouts. For this reason, I’m wondering if I could use the oscam.fakecw so I can sort out this issue.

QUESTION Nº3: How could I filter fake cw and void ECM so I can avoid cuts and black screens with OSCAM?.

Despite having a lot of NOKs and a couple of timeouts, my decoder can descramble the image so fluidly. I think it is because OSCAM server asks the key to two different readers.

It is said that “the company that owns 1810 caid” punish detected sharing cards by sending a lot of fake cw and fake ECM. Nevertheless, I’m still trying to understand the next question:

QUESTION Nº4: What is the meaning of “timeout” when you are descrambling the encoded TS? Why it depends on the channel?.

For instance, on one hand the channels Comedy Central HD and M. Series 2 have a lot of cuts while in the other hand La 1 HD works so fine.

QUESTION Nº5: What is the accurate point which this solution is no longer technically scalable?

I am completely encouraged to seek for more information about this issue. I’m keeping on reading your answers so I learn more about it.

Thank you so much!.

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[ESP]

Hola!, muy buenas noches. Tras algunos días revisando todos los foros de internet bien a fondo, tengo algunas cuestiones que no acabo de entender con el tema de OSCAM.

Debido a que cierta compañía ha incrementado su seguridad en las CAM, he aprovechado y me he informado un poco sobre OSCAM.

Mi idea principal era hacer un servidor caché con varias CCCAM para dos de mis receptores (un engel 8100 y un vu+zero) con la finalidad de hacer loadbalancing para que si una línea no funcionase, me funcionase la otra. De igual manera, he intentado hacer un mecanismo de caché para que, si están los dos aparatos en el mismo canal, el servidor OSCAM envíe los ECM desde el caché en lugar de volver a consultar a los readers.

Mi primera pregunta llega aquí:

PREGUNTA 1: ¿Para que la caché consulte a los readers y posteriormente entregue los ECM a los receptores es necesario tener activado CacheEx?.

En principio, según pone en los foros no, pero es que resulta que si no lo activo no me aparece caché found in (800ms), por ejemplo, y pasan a consultar directamente los receptores a los readers.

PREGUNTA 2: (Es posible que no sea ECM y sea EMM o otra cosa, ya que no termino de entender muy bien la diferencia).

Por otro lado, últimamente tengo un montón de NOK (entre 4 y 7% en el peor de los casos), y sobre todo un montón de timeouts.

Por esta razón, me pregunto si los NOK se solucionan con el oscam.fakecw o para qué sirve exactamente.

PREGUNTA 3: ¿Cómo podría filtrar las llaves falsas empleando OSCAM?.

A pesar de tener tantos NOK no se suele cortar mucho, ya que por alguna razón, cuando una línea da timeout, la segunda ha encontrado la llave a tiempo y no se corta. Tengo entendido que la operadora envía fake cw para castigar a las tarjetas que solicitan demasiado, y que las tienen divisadas. Si esto es así, entonces entiendo el por qué lo que la línea 1 no me da, ya me lo da la 2...

Además,

PREGUNTA 4: ¿Qué significa un timeout y por qué depende del canal?.

Por ejemplo, en mi caso los canales Comedy Central HD y M. Series 2 suelen tener un montón de timeouts, mientras que La 1 HD no.

PREGUNTA 5: ¿Hasta qué punto este sistema con caché es escalable?,

es decir, que en lugar de aguantar 2 receptores aguante 5. Se me ha olvidado comentarlo, pero tengo 15 readers...

Estoy hecho un completo lío... Me he leído la wiki, el foro de allí, me he registrado hasta en el inframundo, y no consigo de entenderlo bien...

La verdad es que me parece demasiado interesante este tema. Llevo una semana entera buscando información en todos los ratos libres que tengo.

Espero que de aquí pueda aprender un poco todo esto.

Muchísimas gracias.

Un saludo!

Todos los readers tienen cards marcadas, efectivamente. ¿Lo que propones podría ser? ¿Quiero decir, que el corte se tenga al mismo tiempo con cada server que use?. No sé muy bien cómo configurar el ratelimit y el ecm limit para no sobrecargar a los servidores...

Muchísimas gracias!. Un saludo.

Quote from casley

Quote from winground

A pesar de tener tantos NOK no se suele cortar mucho, ya que por alguna razón, cuando una línea da timeout, la segunda ha encontrado la llave a tiempo y no se corta. Tengo entendido que la operadora envía fake cw para castigar a las tarjetas que solicitan demasiado, y que las tienen divisadas. Si esto es así, entonces entiendo el por qué lo que la línea 1 no me da, ya me lo da la 2...

Eso puede ser debido a que todos los readers que tienes tienen cards marcadas , y el corte lo vas a tener al mismo tiempo con cada server que uses. no?

Hi casley.

Thanks for answering me.

I think that all the cards don't bring fake ecm at same time. I'm not sure what I did.

As far as I know, I'd activated the "Block fake cw" , " block emm" , "Drop CWs with wrong checksum:" and you've got a oscam.fakecw file. Then, The number of NOKs decreased a lot.

What I meant was that sometimes I guess that I receive fake ecm like a punish to me for using a lot the readers. For this reason, I wanted to know the proper ecm limit ant ratelimittime so the cccam readers coundn't be overloaded.

Thank you for your time and your answers!.

EDIT: I used this file: oscam.fakecws folder - Oscam - Linux Satellite Support Community (linuxsat-support.com) for fake ecm avoidance.

I will see when the football will be broadcasted...

Quote from casley

ok sorry

Ok, but if all those cards have the black screen at the same time, in a moment of darkness, how do you intend to have an image? if all cards are receiving fake ecm. ? I don't know if I explain myself

Code

Hi,

I realised that sometimes Oscam detects good cwcs and then it goes to black screen. I think that Oscam reads fake cw and oscam doesn't realise it. Could it be?

There were several black screens in the last football match today. I'm not sure what is going on. I will test ncam+ so I can see if it is worth.

The file that I downloaded (oscam.fakecw) doesn't work propertly. I don't know where I could find the property fakecw for 1810 caid.

Thank you!.

Quote from casley

hi,

Code

It could be a solution for daily attacks but it would have to be studied well. My theory from what I see, which I am most likely wrong, they do several types of attacks, the daily ones to specific channels sending fake ecm, and when there are events, I think what they attack is the servers.

Quote from casley

Code

I imagine that you do not have a local card, if not that you connect to extreme servers, and if so, you do not have the problem, it does not matter which emu you use (oscam, ncam, cccam? they will all give you the same problem. The fault is in the cards of the servers, which are the ones that swallow the fake ecms and then send them to their users.

Yes. You're right. I thought that if I use a lot of readers at same time Oscam will find the correct ecm in at least one of them. I tried to stop fake cw sent by local cards but I am not sure how I could do it.

Thank you for your reply!.