From owner-freebsd-hackers Tue Sep 19 7:31:38 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from ns.internet.dk (ns.internet.dk [194.19.140.1]) by hub.freebsd.org (Postfix) with ESMTP id ECD3537B423 for ; Tue, 19 Sep 2000 07:31:34 -0700 (PDT) Received: (from uucp@localhost) by ns.internet.dk (8.9.3/8.9.3) with UUCP id QAA88233 for freebsd-hackers@FreeBSD.ORG; Tue, 19 Sep 2000 16:31:30 +0200 (CEST) (envelope-from leifn@neland.dk) Received: from gina (gina.neland.dk [192.168.0.14]) by arnold.neland.dk (8.11.0/8.11.0) with SMTP id e8J93vN05018 for ; Tue, 19 Sep 2000 11:04:00 +0200 (CEST) (envelope-from leifn@neland.dk) Message-ID: <00ac01c02218$7f91e080$0e00a8c0@neland.dk> Reply-To: "Leif Neland" From: "Leif Neland" To: Subject: traceroute using tcp to a port? Date: Tue, 19 Sep 2000 11:00:57 +0200 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.3018.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.3018.1300 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG If I understand correctly, traceroute works by sending pings with ttl=1, ttl=2,ttl=3 etc and records the names of the routers where the ttl reaches zero. However, an increasing number of sites believes in security by obscurity, and blocks for pings. Would the same technique work for making a telnet to port 80 with ttl=1, ttl=2 etc? Leif To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message