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Verificando performance do seu webcache 
Thursday, July 08, 2010, 14:16
Posted by Administrator
http_access allow manager localhost
http_access deny manager


$ sudo apt-get install squidclient
$ squidclient -h 127.0.0.1 -p 3128 cache_object://localhost/info


Atente-se aos valores:

File descriptor usage for squid:
	Maximum number of file descriptors:   4096
	Largest file desc currently in use:   2050
	Number of file desc currently in use: 2003



	Cache Misses:          0.23230  0.23230
	Cache Hits:            0.00767  0.00919



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Variações do mesmo tema (COPA para todos) 
Friday, June 18, 2010, 11:26
Posted by Administrator
Caros,

No último post foi para pegar a stream de uma plaquinha USB e enviar para um grupo multicast na sua rede local.

Mas aí fica a pergunta, e se a pessoa não estiver no mesmo domínio multicast que voce ? 

$ cvlc udp://@239.239.239.239 --sout  '#transcode{vcodec=DIV3,vb=800,scale=1,acodec=mp3,ab=128,channels=2,samplerate=44100}:std{access=http,mux=asf,dst=0.0.0.0:8080}'


E seus amigos conseguirão acessar

$ vlc http://ip_da_sua_maquina:8080


Mas, lembre-se que cada conexão vai utilizar o seu link, convém repassar a seguinte configuracao para o seu amigo em uma rede remota, mais ou menos o seguinte:

$ cvlc http://ip_da_sua_maquina:8080 --sout '#std{access=udp,dst=239.239.239.239:1234}'


Agora, há um multicast lá na rede do seu amigo.

$ vlc udp://@239.239.239.239:1234


Assim todos que estiverem na rede do seu amigo, conseguirão assistir a mesma stream com somente uma conexão ao seu servidor.

É isso,

sds
Kl0nEz
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Em tempos de copa !!!! 
Thursday, May 13, 2010, 17:19
Posted by Administrator
Caros,

DVD/tv digital/HDTV under linux !!!!! + tv stream ... :)

Distribuição utilizada
Ubuntu 10.04
kernel = 2.6.32-22-generic


Dispositivo...
# lsusb
Bus 002 Device 004: ID 1554:5010 Prolink Microsystems Corp.


Depois de plugado...
# dmesg
[ 1276.060250] usb 1-2: USB disconnect, address 2
[ 1276.088387] dvb-usb: Prolink Pixelview SBTVD successfully deinitialized and disconnected.
[ 1294.248018] usb 2-2: new high speed USB device using ehci_hcd and address 4
[ 1294.381055] usb 2-2: configuration #1 chosen from 1 choice
[ 1294.381324] dvb-usb: found a 'Prolink Pixelview SBTVD' in cold state, will try to load a firmware
[ 1294.381328] usb 2-2: firmware: requesting dvb-usb-dib0700-1.20.fw
[ 1294.383635] dvb-usb: downloading firmware from file 'dvb-usb-dib0700-1.20.fw'
[ 1294.594159] dib0700: firmware started successfully.
[ 1295.097021] dvb-usb: found a 'Prolink Pixelview SBTVD' in warm state.
[ 1295.097072] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[ 1295.097277] DVB: registering new adapter (Prolink Pixelview SBTVD)
[ 1295.323901] DVB: registering adapter 0 frontend 0 (DiBcom 8000 ISDB-T)...
[ 1295.534859] DiB0070: successfully identified
[ 1295.534940] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.7/usb2/2-2/input/input7
[ 1295.535003] dvb-usb: schedule remote query interval to 50 msecs.
[ 1295.535007] dvb-usb: Prolink Pixelview SBTVD successfully initialized and connected.


Instalando o necessário
# apt-get install vlc dvb-apps


Fazendo o scan dos canais existentes na sua região, encontrei neste site ( http://dougsland.livejournal.com/103169.html )

# cat > ch_freq.conf << .EOF.
# UHF channels 14 to 69
T 473142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 14
T 479142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 15
T 485142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 16
T 491142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 17
T 497142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 18
T 503142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 19
T 509142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 20
T 515142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 21
T 521142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 22
T 527142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 23
T 533142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 24
T 539142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 25
T 545142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 26
T 551142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 27
T 557142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 28
T 563142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 29
T 569142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 30
T 575142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 31
T 581142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 32
T 587142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 33
T 593142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 34
T 599142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 35
T 605142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 36
# channel 37 not used
T 617142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 38
T 623142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 39
T 629142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 40
T 635142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 41
T 641142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 42
T 647142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 43
T 653142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 44
T 659142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 45
T 665142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 46
T 671142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 47
T 677142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 48
T 683142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 49
T 689142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 50
T 695142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 51
T 701142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 52
T 707142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 53
T 713142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 54
T 719142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 55
T 725142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 56
T 731142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 57
T 737142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 58
T 743142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 59
T 749142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 60
T 755142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 61
T 761142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 62
T 767142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 63
T 773142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 64
T 779142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 65
T 785142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 66
T 791142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 67
T 797142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 68
T 803142857 6MHz 3/4 AUTO AUTO AUTO AUTO NONE # channel 69
.EOF.


Fazer scan com essa tabela de frequencia

#  scan ch_freq.conf > channels.conf


Pronto... se tudo estiver certinho, voce terá os canais já mapeados no arquivo channels.conf. Pode utilizar com o VLC, utilizando o método apresentado no site mencionado acima (e também nas refências).

Para poupar o trabalho das pessoas de Vitória/ES, eu encontrei estes canais:
# cat channels.conf 
TV GAZETA HD:521142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE:4113:4115:16960
TV Gazeta MOB1:521142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE:4097:4099:16984
TV VITORIA HD:617142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE:0:0:16992
TV Vitoria Mobile:617142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE:0:0:17016


Agora a parte divertida, fazer streaming disso para o pessoal da sua rede.

1 - Criei um arquivo somente com o canal que eu quero fazer stream:

# cat gazetamob.conf
TV Gazeta MOB1:521142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE:4097:4099:16984


2 - Usando o VLC para fazer stream para um grupo multicast:
# vlc gazetamob.conf --sout '#std{access=udp,dst=239.239.239.239:1234}'


3 - Acessando o stream, válido para usuários de linux, windows, mac, que estejam na mesma rede.
$ vlc udp://@239.239.239.239:1234


Refências:
http://wiki.videolan.org/Documentation: ... e_Examples
http://dougsland.livejournal.com/103169.html
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SSH vpn 
Tuesday, March 23, 2010, 11:21
Posted by Administrator
SSH tunnel já estava legal... e agora ?

requires: netcat pppd ssh (client and server)

references:

http://www.virtualbox.org/wiki/PPP_Tunnel

server: 192.168.0.1

Somente o serviço SSH habilitado.
$ ssh root@192.168.0.1 -L 1234:127.0.0.1:1234
root@192.168.0.1's password: 

# pppd noauth local lock nodefaultroute persist debug nodetach 10.1.2.3:10.4.5.6 pty "nc -l 127.0.0.1 -p 1234"

Em outra shell
$ sudo pppd noauth local lock nodefaultroute persist debug nodetach passive pty "nc 127.0.0.1 1234"

foi ?

:)

sds
Kl0nEz
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SSH tcp tunnel 
Monday, March 22, 2010, 11:58
Posted by Administrator
tunnel ssh

ssh client

server : 192.168.0.1
port : 1234

ssh root@192.168.0.1 -L 1234:127.0.0.1:1234

putty


Session
Hostname => 192.168.0.1

Connection -> ssh -> tunnels
Source port => 1234
Destination => 127.0.0.1:1234
ADD

Open


telnet 127.0.0.1 1234 ---> ssh tunnel ---> 127.0.0.1:1234

enjoy

Kl0nEz

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