Bypass torrent block of my university network?

Data that travels over the air and how to protect (or decipher) it

Bypass torrent block of my university network?

Post by ernglg on Wed Jan 16, 2013 10:10 am
([msg=72297]see Bypass torrent block of my university network?[/msg])

There is a filtering at university for bittorrent and in fact any attempt to bittorent causes to be banned for a while. I have map the school network with nmap and traceroute to see the route of the packages and the possible candidate serevers causing this filtering. I saw that my packages pass straight on just two machines. One is the router machine of my a little network with addresses and the other machine is the main gateway of the university network that is connected to the out bound net. In addition I run nmap to see the open ports of these machines to see the predict applications running on machines. Here are the list of open ports :

The last gateway to the outbound :
Code: Select all
PORT    STATE    SERVICE
22/tcp  open     ssh
25/tcp  open     smtp
135/tcp filtered msrpc
139/tcp filtered netbios-ssn
161/tcp filtered snmp
179/tcp open     bgp
199/tcp filtered smux
445/tcp filtered microsoft-ds
873/tcp open     rsync
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=5.21%D=1/16%OT=22%CT=1%CU=37350%PV=N%DS=1%DC=I%G=Y%TM=50F6C132%P=
OS:x86_64-unknown-linux-gnu)SEQ(SP=CC%GCD=1%ISR=CF%TI=Z%CI=Z%II=I%TS=U)OPS(
OS:O1=M5B4NNSNWA%O2=M5B4NNSNWA%O3=M5B4NWA%O4=M5B4NNSNWA%O5=M5B4NNSNWA%O6=M5
OS:B4NNS)WIN(W1=111C%W2=111C%W3=111C%W4=111C%W5=111C%W6=111C)ECN(R=Y%DF=Y%T
OS:=40%W=111C%O=M5B4NNSNWA%CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=AS%RD=0%Q=)T
OS:2(R=N)T3(R=Y%DF=Y%T=40%W=111C%S=O%A=S+%F=AS%O=M5B4NNSNWA%RD=0%Q=)T3(R=Y%
OS:DF=Y%T=40%W=111C%S=O%A=O%F=A%O=%RD=0%Q=)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R
OS:%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=
OS:40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0
OS:%Q=)U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R
OS:=Y%DFI=N%T=40%CD=S)

Network Distance: 1 hop


first node just after my machine:

Code: Select all
PORT    STATE    SERVICE
22/tcp  open     ssh
25/tcp  open     smtp
135/tcp filtered msrpc
139/tcp filtered netbios-ssn
161/tcp filtered snmp
179/tcp open     bgp
199/tcp filtered smux
445/tcp filtered microsoft-ds
873/tcp open     rsync
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=5.21%D=1/16%OT=22%CT=1%CU=37350%PV=N%DS=1%DC=I%G=Y%TM=50F6C132%P=
OS:x86_64-unknown-linux-gnu)SEQ(SP=CC%GCD=1%ISR=CF%TI=Z%CI=Z%II=I%TS=U)OPS(
OS:O1=M5B4NNSNWA%O2=M5B4NNSNWA%O3=M5B4NWA%O4=M5B4NNSNWA%O5=M5B4NNSNWA%O6=M5
OS:B4NNS)WIN(W1=111C%W2=111C%W3=111C%W4=111C%W5=111C%W6=111C)ECN(R=Y%DF=Y%T
OS:=40%W=111C%O=M5B4NNSNWA%CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=AS%RD=0%Q=)T
OS:2(R=N)T3(R=Y%DF=Y%T=40%W=111C%S=O%A=S+%F=AS%O=M5B4NNSNWA%RD=0%Q=)T3(R=Y%
OS:DF=Y%T=40%W=111C%S=O%A=O%F=A%O=%RD=0%Q=)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R
OS:%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=
OS:40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0
OS:%Q=)U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R
OS:=Y%DFI=N%T=40%CD=S)

Network Distance: 1 hop


With respect to these information do you think what causes that filtering and how can be bypassed?
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Re: Bypass torrent block of my university network?

Post by fashizzlepop on Wed Jan 16, 2013 6:46 pm
([msg=72302]see Re: Bypass torrent block of my university network?[/msg])

That first one is probably what sniffs for bittorrent traffic. If you need, just tunnel it through SSH or a SOCK5 proxy. Or use a vpn. Is ALL torrent traffic disallowed? Even legitimate downloading (linux ISOs come to mind)?

I still torrent stuff at my university but I use a private tracker and I've never had a problem.
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Re: Bypass torrent block of my university network?

Post by illusion_ on Wed Jan 16, 2013 6:48 pm
([msg=72303]see Re: Bypass torrent block of my university network?[/msg])

Probably the best way to bypass filtering of any kind is to tunnel your traffic through a VPN. That will make your connection slower, but it makes it virtually impossible to filter your traffic (because all they see is VPN traffic, not what's going on inside the VPN). There are plenty of free VPN services out there, but not all of them allow you to tunnel Internet traffic through them. Look for VPN services that claim to make you anonymous online.

Also, Tor would probably work
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Re: Bypass torrent block of my university network?

Post by fashizzlepop on Wed Jan 16, 2013 6:51 pm
([msg=72305]see Re: Bypass torrent block of my university network?[/msg])

illusion_ wrote:Also, Tor would probably work

Don't use Tor for p2p sharing. It's not meant for that. It will be slow and it will also make it slower for everyone else.
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Re: Bypass torrent block of my university network?

Post by -Ninjex- on Thu Jan 17, 2013 12:21 am
([msg=72311]see Re: Bypass torrent block of my university network?[/msg])

If you have a linux box, you could look into proxychains as well.
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Re: Bypass torrent block of my university network?

Post by fashizzlepop on Thu Jan 17, 2013 3:24 am
([msg=72313]see Re: Bypass torrent block of my university network?[/msg])

Idk about "chaining" but using it as an SSH tunnel basically gives you your own VPN per se. Of course it would have to be sitting outside of the school network as well.
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