---
name: "ashunt"
section: "8"
platform: "linux"
package: "netsniff-ng"
version: "0.5.7-1"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/ashunt"
---

# ashunt(8)

Autonomous System (AS) trace route utility

## NAME

ashunt - Autonomous System (AS) trace route utility

## SYNOPSIS

ashunt	-H\|--host \<host\> -i\|-d\|--dev \<dev\> \[-6\|--ipv6\]\
 	\[-n\|--numeric\] \[-N\|--dns\] \[-f\|--init-ttl \<ttl\>\]\
 	\[-m\|--max-ttl \<ttl\>\] \[-q\|--num-probes\] \[-x\|--timeout \<sec\>\]\
 	\[-S\|--syn\] \[-A\|--ack\] \[-F\|--fin\] \[-P\|--psh\] \[-U\|--urg\]\
 	\[-R\|--rst\] \[-E\|--ecn-syn\] \[-t\|--tos \<tos\>\] \[-G\|--nofrag\]\
 	\[-X\|--payload \<string\>\] \[-Z\|--show-packet\] \[-l\|--totlen \<len\>\]\
 	\[-w\|--whois \<server\>\] \[-W\|--wport \<port\>\] \[--city-db \<path\>\]\
 	\[--country-db \<path\>\] \[-v\|--version\] \[-h\|--help\]

## DESCRIPTION

This program provides AS information on each hop between the client and the target host.

## OPTIONS

- ashunt -i eth0 -N -E -H netsniff-ng.org

  IPv4 trace of AS with TCP ECN SYN probe

- ashunt -i eth0 -N -S -H netsniff-ng.org

  IPv4 trace of AS with TCP SYN probe

- ashunt -i eth0 -N -F -H netsniff-ng.org

  IPv4 trace of AS with TCP FIN probe

- ashunt -i eth0 -N -FPU -H netsniff-ng.org

  IPv4 trace of AS with Xmas probe

- ashunt -i eth0 -N -H netsniff-ng.org -X "censor-me" -Z

  IPv4 trace of AS with Null probe with ASCII payload

- ashunt -6 -S -i eth0 -H netsniff-ng.org

  IPv6 trace of AS up to netsniff-ng.org

## OPTIONS

- \-h\|--help

  Print help text and lists all options.

- \-v\|--version

  Print version.

- \-H\|--host \<host\>

  Host/IPv4/IPv6 to lookup AS route to

- i-\|-d\|--dev \<netdev\>

  Networking device, i.e. eth0

- \-p\|--port \<port\>

  Hosts port to lookup AS route to

- \-4\|--ipv4

  Use IPv4 requests (default)

- \-6\|--ipv6

  Use IPv6 requests

- \-n\|--numeric

  Do not do reverse DNS lookup for hops

- \-N\|--dns

  Do a reverse DNS lookup for hops

- \-f\|--init-ttl \<ttl\>

  Set initial TTL

- \-m\|--max-ttl \<ttl\>

  Set maximum TTL (default: 30)

- \-q\|--num-probes \<num\>

  Number of max probes for each hop (default: 3)

- \-x\|--timeout \<sec\>

  Probe response timeout in sec (default: 3)

- \-S\|--syn

  Set TCP SYN flag in packets

- \-A\|--ack

  Set TCP ACK flag in packets

- \-F\|--fin

  Set TCP FIN flag in packets

- \-P\|--psh

  Set TCP PSH flag in packets

- \-U\|--urg

  Set TCP URG flag in packets

- \-R\|--rst

  Set TCP RST flag in packets

- \-E\|--ecn-syn

  Send ECN SYN packets (RFC3168)

- \-t\|--tos \<tos\>

  Set the IP TOS field

- \-w\|--whois \<server\>

  Use a different AS whois DB server (default: /etc/netsniff-ng/whois.conf)

- \-W\|--wport \<port\>

  Use a different port to AS whois server (default: /etc/netsniff-ng/whois.conf)

- \--city-db \<path\>

  Specifiy path for geoip city database

- \--country-db \<path\>

  Specifiy path for geoip country database

## AUTHOR

Written by Daniel Borkmann \<daniel@netsniff-ng.org\>

## DOCUMENTATION

Documentation by Emmanuel Roullit \<emmanuel@netsniff-ng.org\>

## BUGS

Please report bugs to \<bugs@netsniff-ng.org\>