diff options
Diffstat (limited to 'usr.sbin/traceroute/traceroute.8')
| -rw-r--r-- | usr.sbin/traceroute/traceroute.8 | 65 |
1 files changed, 60 insertions, 5 deletions
diff --git a/usr.sbin/traceroute/traceroute.8 b/usr.sbin/traceroute/traceroute.8 index 203b743fb408..f36d473f2727 100644 --- a/usr.sbin/traceroute/traceroute.8 +++ b/usr.sbin/traceroute/traceroute.8 @@ -1,3 +1,6 @@ +.\" +.\" SPDX-License-Identifier: BSD-4.3TAHOE +.\" .\" Copyright (c) 1989, 1995, 1996, 1997, 1999, 2000 .\" The Regents of the University of California. All rights reserved. .\" @@ -15,7 +18,7 @@ .\" .\" $Id: traceroute.8,v 1.19 2000/09/21 08:44:19 leres Exp $ .\" -.Dd November 17, 2023 +.Dd May 14, 2025 .Dt TRACEROUTE 8 .Os .Sh NAME @@ -136,10 +139,62 @@ to terminate the route tracing). If something is listening on a port in the default range, this option can be used to pick an unused port range. .It Fl P Ar proto -Send packets of specified IP protocol. -The currently supported protocols -are: UDP, UDP-Lite, TCP, SCTP, GRE and ICMP. -Other protocols may also be specified (either by name or by number), though +Use packets of specified IP protocol when sending probes. +The +.Ar proto +argument may be one of the following: +.Bl -tag -width Ar udplite +.It Ar udp +Use +.Xr udp 4 +packets. +This is the default. +.It Ar icmp +Use +.Xr icmp 4 +.Dq echo request +packets. +.It Ar udplite +Use +.Xr udplite 4 +packets. +.It Ar tcp +Use +.Xr tcp 4 +.Dq SYN +packets. +This will cause a successful traceroute to end with no response (i.e., a +.Dq * +response) since +.Nm +does not know how to detect the RST or SYN+ACK response from the +destination host. +.It Ar sctp +Use +.Xr sctp 4 +packets. +The +.Ar packetlen +argument must be a multiple of 4. +SCTP probes will be constructed as SCTP +.Dq INIT +chunks, unless the packet length is too small, in which case the probes +will be SCTP +.Dq SHUTDOWN-ACK +chunks followed by zero or one +.Dq PAD +chunks. +.It Ar gre +Use +.Xr gre 4 +packets. +The GRE packets will be constructed as if they contain a PPTP +(Point-to-Point Tunneling Protocol) payload. +.El +.Pp +Other protocols may also be specified, either by number or by name (see +.Xr protocols 5 ) , +though .Nm does not implement any special knowledge of their packet formats. This option is useful for determining which router along a path may be blocking |