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MAPPING-CYBERSPACE  July 2004

MAPPING-CYBERSPACE July 2004

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Subject:

Re: Traceroute and firewalls

From:

Paul Bevan <[log in to unmask]>

Reply-To:

Mapping and visualising Internet infrastructure and Web space <[log in to unmask]>

Date:

Thu, 29 Jul 2004 09:31:47 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (45 lines)

Andrew,

I know it's not a perfect solution but Visual Route
<http://www.visualware.com/business/demo/visualroute/livedemo.html> offers a
free java applet demo which works through IE (and therefore our HTTP proxy,
I think). This gives the game away somewhat in terms of a map but also lists
the traceroute info.

Paul

-----Original Message-----
From: Mapping and visualising Internet infrastructure and Web space
[mailto:[log in to unmask]] On Behalf Of Andrew Young
Sent: 28 July 2004 14:08
To: [log in to unmask]
Subject: [MAPPING-CYBERSPACE] Traceroute and firewalls

Dear all

For the last few years, I have set my students an assignment to use
ping/traceroute to look at routes and performance to various places on the
Internet, draw annotated maps, and reach various conclusions. They have
always found it very interesting.

For the last year I have been fighting with various packet filters that have
been stopping me doing this. I have now reached an impasse and can't get
traceroute to work at all (I have tried ICMP, UDP or TCP based versions).

As ping still works, it seems to me that my University (or their ISP) are
filtering the "TTL Exceeded" reply. I am trying to get them to remove this,
but I need a fallback position in case they won't.

Does anyone have any ideas for other equivalent things I can do that aren't
so susceptible to firewall interference.

Thanks

Andrew

--
Andrew Young                                Work: [log in to unmask]
School of Computing, Science and Engineering Tel: 0161 295 5257
University of Salford                        Fax: 0870 056 2359
Manchester M5 4WT

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