<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hi all,<br>
<br>
I'm an undergraduate student working as a research assistant for the
summer. My current task is to figure out a way to measure delay
caused by individual nodes (we want to replicate this paper: <a
href="http://cis.poly.edu/%7Eross/papers/Tor.pdf">http://cis.poly.edu/~ross/papers/Tor.pdf</a>).
It seems to me that the easiest way of accomplishing this would be
to run an exit node and construct a two-hop circuit to it.<br>
<br>
OP ------> Node to be measured -------> Exit node<br>
<br>
Since the OP and exit node are under my control, I could measure the
time it takes for any packets to reach the exit node from the OP. I
want to be the only one who can use this exit node so I don't have
to worry about getting approval from the school to run an exit node
(could be time-consuming). I realize this is pretty far from any
design goals the developers have, but is there some way of running a
hidden exit node? One that doesn't appear on any directory server
(PublishServerDescriptor 0 might work)<strong></strong><span
class="Apple-style-span" style="color: rgb(35, 48, 14);
font-family: Georgia, 'Times New Roman', Times, serif; font-size:
20px; font-style: normal; font-variant: normal; font-weight: bold;
letter-spacing: normal; line-height: 28px; orphans: 2; text-align:
-webkit-auto; text-indent: 0px; text-transform: none; white-space:
normal; widows: 2; word-spacing: 0px;
-webkit-text-decorations-in-effect: none;
-webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); "><strong style="margin-top:
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;
padding-top: 0px; padding-right: 0px; padding-bottom: 0px;
padding-left: 0px; border-top-width: 0px; border-right-width:
0px; border-bottom-width: 0px; border-left-width: 0px;
border-style: initial; border-color: initial; outline-width:
0px; outline-style: initial; outline-color: initial;
font-weight: bold; font-style: inherit; font-size: 20px;
font-family: inherit; vertical-align: baseline; "></strong></span>,
but can still be used if you know its IP address? The Tor Control
Protocol makes it easy enough to create a custom circuit (discussed
here: <a class="moz-txt-link-freetext" href="http://thesprawl.org/memdump/?entry=8">http://thesprawl.org/memdump/?entry=8</a>), but it won't accept IP
addresses for nodes. I can put an IP in exitnodes in the torrc file,
but exitnodes doesn't seem to have any effect, even when
StrictExitNodes is set.<br>
<br>
Thanks<br>
<br>
Joel<br>
<br>
</body>
</html>