diff options
Diffstat (limited to 'net/tcptraceroute-devel/pkg-descr')
| -rw-r--r-- | net/tcptraceroute-devel/pkg-descr | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/tcptraceroute-devel/pkg-descr b/net/tcptraceroute-devel/pkg-descr new file mode 100644 index 000000000000..a25b74bedc74 --- /dev/null +++ b/net/tcptraceroute-devel/pkg-descr @@ -0,0 +1,17 @@ +tcptraceroute is a traceroute implementation using TCP packets. + +The more traditional traceroute(8) sends out either UDP or ICMP ECHO packets +with a TTL of one, and increments the TTL until the destination has been +reached. By printing the gateways that generate ICMP time exceeded messages +along the way, it is able to determine the path packets are taking to reach +the destination. + +The problem is that with the widespread use of firewalls on the modern +Internet, many of the packets that traceroute(8) sends out end up being +filtered, making it impossible to completely trace the path to the destination. +However, in many cases, these firewalls will permit inbound TCP packets to +specific ports that hosts sitting behind the firewall are listening for +connections on. By sending out TCP SYN packets instead of UDP or ICMP ECHO +packets, tcptraceroute is able to bypass the most common firewall filters. + +WWW: http://michael.toren.net/code/tcptraceroute/ |