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Special Forums IP Networking Help determining what's blocking ports Post 302266509 by brandonros on Wednesday 10th of December 2008 11:28:33 AM
Old 12-10-2008
Haha, no offense taken, you're absolutely right... it doesn't speak well of them. I say I was assigned to do it, because I'm not getting paid anything extra for it. I'm a teacher at a small private school that needed a networking guy so they asked me and I said I'd do what I can.

So I tried telnet and get "could not open connection to the host on port..." I know that these ports are being blocked by something we have here, but I've tried port forwarding on all of the firewalls and routers that I could, and I still get blocked. I've set up utorrent to use port 40000. Is there any program (nmap included) that will determine exactly which local ip address is blocking a certain port? This way, I could narrow it down to what piece of hardware is doing the blocking and work from there.
 

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IP-TOKEN(8)							       Linux							       IP-TOKEN(8)

NAME
ip-token - tokenized interface identifier support SYNOPSIS
ip token { COMMAND | help } ip token set TOKEN dev DEV ip token del dev DEV ip token get [ dev DEV ] ip token [ list ] DESCRIPTION
IPv6 tokenized interface identifier support is used for assigning well-known host-part addresses to nodes whilst still obtaining a global network prefix from Router advertisements. The primary target for tokenized identifiers are server platforms where addresses are usually manually configured, rather than using DHCPv6 or SLAAC. By using tokenized identifiers, hosts can still determine their network prefix by use of SLAAC, but more readily be automatically renumbered should their network prefix change [1]. Tokenized IPv6 Identifiers are described in the draft [1]: <draft-chown-6man-tokenised-ipv6-identifiers-02>. ip token set - set an interface token set the interface token to the kernel. TOKEN the interface identifier token address. dev DEV the networking interface. ip token del - delete an interface token delete the interface token from the kernel. dev DEV the networking interface. ip token get - get the interface token from the kernel show a tokenized interface identifier of a particular networking device. Arguments: coincide with the arguments of ip token set but the TOKEN must be left out. ip token list - list all interface tokens list all tokenized interface identifiers for the networking interfaces from the kernel. SEE ALSO
ip(8) AUTHOR
Manpage by Daniel Borkmann iproute2 28 Mar 2013 IP-TOKEN(8)
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