Palydovinis internetas?

[openbox]

Štai tokia tai naujiena:
Sirius 2, 4.8°E
Интернет-сервис 'Радуга' появился на 12680H, SR 4847, FEC 3/4.
Kažkada aiškinausi, kad tai beprotiški pinigai.
Dabar gi žiūriu, kad tas Raduga internetas visai palankus:
http://www.radugainternet.ru/service/ra ... r4#Economy

Jei tarkime gūdžiame kaime nėra nei Telekomo, nei kabelinės, tai palydovinis internetas gal jau greitesnis ir pigesnis už GPRS internetą?

[nerux]

Nu, bet ne pigi kiek žinau abipusio interneto įranga.

[Tadas-uk]

kazkada domejausi tuo dalyku,bet tas mano domejimasis greitai baigesi,bandziau kazka daryti su tokia casablanka,cia tipo spec programa,bet.....na jo ir tas dalykas tikrai brangus neverta net galvot vokietijoj kiek pamenu net tam tikrom valandom ir teveikdavo....bet tiksliai nepamenu tikrai nieko gero.......

[Leonid]

Laba, Rusijos forumose skaiciau toki bajeri, kad galima per SAT varit intika (naudot failu ir tinklapuigavimui), tai yra sakykim per GPRS duodu uzklausa, o atsakyma gaunu per palydova. Reikia turet DVB korta, lekste, o galva prijungt prie tos kortos. Vat mane domina toks klausymelis: ar galimas toks dalykas cia Lietuvoi, kokie provaideriai ir kiek tai kainuotu? Domiosi butent del to, kad gyvenu gan toli nuo miesto ir DLS intiko prijungt tikrai negaliu, bandziau susidraugaut su erdves kompanija (ji duoda belaidi intika), sako kad del keliu abonentu nekeis aparaturos, trumpiau tariant pasiunte, kolkas omniconnect turiu, bet cia gi irgi ne iseitis...

[nerux]

Laba, Rusijos forumose skaiciau toki bajeri, kad galima per SAT varit intika (naudot failu ir tinklapuigavimui), tai yra sakykim per GPRS duodu uzklausa, o atsakyma gaunu per palydova. Reikia turet DVB korta, lekste, o galva prijungt prie tos kortos. Vat mane domina toks klausymelis: ar galimas toks dalykas cia Lietuvoi, kokie provaideriai ir kiek tai kainuotu? Domiosi butent del to, kad gyvenu gan toli nuo miesto ir DLS intiko prijungt tikrai negaliu, bandziau susidraugaut su erdves kompanija (ji duoda belaidi intika), sako kad del keliu abonentu nekeis aparaturos, trumpiau tariant pasiunte, kolkas omniconnect turiu, bet cia gi irgi ne iseitis...

Na čia yra kažkiek infos ko reikia

http://www.erksa.lt/Lt/index.php?option ... 988d6fadf9

[olesub]

Kai turejau dar DM500 ir omniconnect naudojausi Satgate paslauga is Siriaus programos Slonax pagalba. Viskas ten veikia, tik ne ant visu imidzu ejo. Del kainu tikrai nepamenu, bet nebuvo ten kazkaip l.brangu. Yra ivairus prepaid tarifai (ar tik ne 1 USD centas uz Mb ir 2048 greitis). Didesniem greiciam aisku brangiau. Dar ir dabar kartais jie siuncia pranesimus, mol dar nesu isnaudojes savo babkiu, junkis ir t.t.

Va kainos uz 1 Gb: http://satgate.net/coverage-maps/tariff ... us-4-b32#1

[a95]

Tai cia vienpusio interneto kainos... ir tai po ~50 lt uz CD be issiuntimo kainos... I kina su visa seima pigiau nuvaziuot O, uz dvipusi - net nezinau, ka kaime reik augint...

[amb]

kad nekurti naujos temos, uzklausiu cia spintoje radau stai toky daikta http://www.aikons.com/htm/tarjetas/pentanet.htm. Senais gerais laikais jo pagalba jamem ineta is satelito. Ar duotu momentu butu kam ydomi sita plokste ar mest lauk?

[Neoromancer]

kad nekurti naujos temos, uzklausiu cia spintoje radau stai toky daikta http://www.aikons.com/htm/tarjetas/pentanet.htm. Senais gerais laikais jo pagalba jamem ineta is satelito. Ar duotu momentu butu kam ydomi sita plokste ar mest lauk?

O ar tik jamėt, ar dar ir žiūrėjot iš palydovo? Šiaip galima paimti nebent pasižaidimui, pasižiūrėjimui, ką galima iš tokių relikvijų išspausti

[amb]

kad nekurti naujos temos, uzklausiu cia spintoje radau stai toky daikta http://www.aikons.com/htm/tarjetas/pentanet.htm. Senais gerais laikais jo pagalba jamem ineta is satelito. Ar duotu momentu butu kam ydomi sita plokste ar mest lauk?

O ar tik jamėt, ar dar ir žiūrėjot iš palydovo? Šiaip galima paimti nebent pasižaidimui, pasižiūrėjimui, ką galima iš tokių relikvijų išspausti

emem tik ineta, t.y. siuntimas vyko per lt provaidery, atgal per SAT (cia tie laikai, kai LT provaideriai ribodavo parsiustu duomenu kieky).

[Andrius_1989]

Free Internet Satellite Downstream / Downlink
The following information are for educational purpose only. Use it at your own risk.

It's meant to show that you can get free internet downstream from satellite and use them as you would use internet connection, that is: browsing, chatting, etc, not just for grabbing files.

Requirements
- Linux with DVB card and LinuxTV drivers, if you don't know how to set this up, go to http://linuxtv.org/

- linuxtv-dvb-apps-1.1.1.tar.gz (get it on http://linuxtv.org/)

- tcpdump

- wget

- An upstream connection with anti-spoofing disabled (read ip spoofing), if you don't know about this you can still try it and see if it'll work

- Point the dish to satellite with downstream internet connection (I can't say which satellite mine pointed to as I believe this is very sensitive information)

Locking With Transponder
You need to know the frequency, polarization, and symbol rate of the transponder.
(Maybe by asking a friend with subscription to a downstream provider for this information......)

First, save the information to a file:

# echo inet:[frequency]:[polarization -- 'v' or 'h']:0:[symbol_rate]:0:0:0:0 > chan

Lock the DVB with 'szap' from linuxtv-dvb-apps package:

# szap -c chan -n 1 -l 5150

5150 are for C-Band, change it if you use other Band, read szap usage.

Choosing Internet PID
By this time I assume you have already set the necessary requirements and can run the command 'dvbtraffic' successfully on the box.

# dvbtraffic

This will show you a list of PIDs and their current bandwidth.

Choose a PID from the list, you want to choose one with very fluctuating bandwidth, because that's more like an internet PID, not an audio/video PID.

Configuring Interface
Run this command, enter the PID as hex (add '0x' in front of the PID)

# dvbnet -p [PID]

You should get successful status report.
Note the newly created interface name, it would say something like 'dvb0_1'.

And enter the following command in one line because you need to delete routing for the interface as fast as you can, cause I believe something bad will happen if you don't

# ifconfig [interface_name] 64.0.0.0/2 promisc; ip route del 64.0.0.0/2 dev [interface name]

We have just set the interface to accept every IP in this world.

Obtaining IP Address
It's time to see if the data flowing to the interface are indeed internet downstream, if so then you'll see IP addresses scrolling on your screen as you enter this command:

# tcpdump -q -n -i [interface_name]

Don't see any IP address? Try another PID. Before you created another interface, delete the current one:

# dvbnet -d [interface_number]

Get the interface number from the name's part (ie. for dvb0_21, 21 is the number)

So you see IP addresses flowing as you tcpdump the interface, great.

Choose an IP from the right side of the line. You don't want to use network and broadcast adresses. The downstream provider that I tested on used /29 network (255.255.255.248), so in my case to calculate network and broadcast addresses:

Assume I got IP address 123.4.5.67 from the right side of the line.

/29 network have 8 addresses, the 1st one for network, the next 6 for hosts, and the last 1 for broadcast.

So I divide 67 with 8.

67 / 8 = 8.375

I took the .375 part and multiply it by 8

0.375 x 8 = 3

That means .67 is the 3rd address from the 8 possible addresses, which means the 3rd host, it's safe to use. You don't want to use the 1st and the 8th address as they are the network and broadcast address.

The counting begins from zero, so 0 is the first address (the network address), and 7 is the eight address (the broadcast address).

SNAT
To use the downstream, we have to use the IP we got before as our source address.

Assume your upstream provider connected to interface eth1.

Enter the command below to use the downstream IP.

# iptables -t nat -I POSTROUTING 1 -o eth1 -j SNAT --to 123.4.5.67

This is the part where your upstream provider must not activated anti-spoofing, if so then you can't use source IP address other than the one they gave you.

Testing The Connection
Just run the following command and see if it work:

# wget www.yahoo.com

Does it successfully download the document from above website? If so continue to test on the graphical browser and see if it successfully download the document. If not then just use another IP, or PID.

Remember, this is for educational purpose only, to bring up the flaw so netadmin will do something about it.

Don't use the downstream and it's IP, someone are paying for it.