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| Bandwidth throttling (oi, slaps) http://forum.gamecommunity.co.uk:8080/viewtopic.php?f=122&t=52132 |
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| Author: | elbow=GCHQ= [ Wed Oct 15, 2008 10:42 am ] |
| Post subject: | Bandwidth throttling (oi, slaps) |
How hard is it to implement a system in a (say) university so exceeding a bandwidth limit will throttle your connection to a crippling but still useable speed? Context: the computer office of my college is introducing a flat £10/gb fine for every gb over 5gb in a week. He says it's too much time/effort/money to do throttling. |
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| Author: | happyslappy [ Wed Oct 15, 2008 11:21 am ] |
| Post subject: | Re: Bandwidth throttling (oi, slaps) |
depends on what you have in place mate do you mean to make something from scratch or buy in a peace of kit to do it for you it wouldnt be to hard to make something tbh i have done this in the past but never when a limit is hit more to the point - is this to stop students / staff p2p`ing ? if so a packeteer would be a better solution, we had a similar traffic policy and its a nightmare to run also - you have to be able to produce the logs when a student contests it. on the first day we had loads of students - mainly asians turning up with bills from 100 to 450 quid the problem is, until they disconect and then reconect the session data is a variable and on our campus it would have been a nightmare to do that so there was a cron job that polled the routers every 10 mins and they got disconected that way. hence if they left there machine on for 3 days they could easly go over there is also ( depending on the topology ) ways around it, run the uni vpn client on campus etc or like i do with virgin - drop the correct flags with iptables to stop them reshaping the TCP window below are sample global TCP flag variables: urg: tcpFlags = 0b100000! -> `Urgent Pointer field significant' ack: tcpFlags = 0b010000! -> `Acknowledgment field significant' psh: tcpFlags = 0b001000! -> `Push Function' rst: tcpFlags = 0b000100! -> `Reset the connection' syn: tcpFlags = 0b000010! -> `Synchronize sequence numbers' fin: tcpFlags = 0b000001! -> `No more data from sender' |
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| Author: | Lemon =GCHQ= [ Wed Oct 15, 2008 12:12 pm ] |
| Post subject: | Re: Bandwidth throttling (oi, slaps) |
FFS get a room you two |
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