blocked site

Discussion in 'Windows Desktop Systems' started by canadian_divx, Jun 28, 2007.

  1. canadian_divx

    canadian_divx Canadian_divx

    is there a way that someone can block a site of a user over the internet.

    like no software put on there computer but they cant access one site through there modem. the IP is changed many times but you still cant connect to it. cant ping it. nothing.

    nothing in host file blocking it. nothing in IE and Firefox.
    tested on 2 different computers on the network
    both are dual boot. xp and vista. neither can connect.

    no spy ware recorded and no viruses.

    any ideas?

    i have also left the modem unplugged power wise and disconnected to change my ip many times.

    and if i reboot. open connection, then firefox. and try to access it, and no go. if netstat its only 2 connections trying to get to it as well.

    and the site is up if i use my neighbors wierless LOL
    any ideas? its bugging me
     
  2. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    maybe your ISP is blocking the site..
     
  3. LeeJend

    LeeJend Moderator

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    Or they have your modems MAC address blocked. Gaming sites used to block MAC addresses if you were banned for misconduct.

    We know because we tried to sneak back in and ruled out everything but the MAC.
     
  4. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    it wouldn't be possible to block the source mac address as it would change after each router hop.
     
  5. gonaads

    gonaads Beware the G-Man Political User Folding Team

    Try another modem.
     
  6. LordOfLA

    LordOfLA Godlike!

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    Yes it would :) because hardware communicates originator to destination at all times. Routers don't change that, they just pass a message on.
     
  7. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    In all my network traces that I've done over my lifetime, unless I had access to the switches and routers in between, I have never been able to sniff the original MAC address.

    and router does change the packet. It rewrites the header info that contains source/destination addresses. If they didn't change the source and destination MAC address, it wouldn't be able to route the packet correctly.

    edit:
    http://www.petri.co.il/csc_routers_switches_and_firewalls.htm
     
    Last edited: Jun 29, 2007
  8. LordOfLA

    LordOfLA Godlike!

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    It basically comes down to the following:

    Internet routers do not care where a packet came from, only where it's going. Therefore they leave the origniator mac address and ip address alone while forwarding it on to the next best hop for its destination.

    Destination host then replies and addresses the packet to the originator mac and ip address and fires the packet off to the first routing device in the journey.

    This I have learned in the three years I've been working at an ISP.
     
  9. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    Really? All my network traces I've ever done tell me otherwise..

    Cisco docs tell me otherwise.. the Source/Dest IP will stay the same, the MAC address HAS to change for the packet to be routed correctly..

    http://www.ciscopress.com/articles/article.asp?p=102093&rl=1
     
  10. Bootsy

    Bootsy Huh?

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    Canadian_Divx, try using a proxy site to connect to where you wanna go
     
  11. canadian_divx

    canadian_divx Canadian_divx

    i have changed to a new modem and it has done the trick.
    i also called the IPS and that was no help. the dude didnt know squat.
    and the site was facebook LOL its just weird that it was blocked from me seeing it with that modem weather it be mac address or something. not sure why it would be tho.