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| author | Pete Fritchman <petef@FreeBSD.org> | 2002-06-09 22:17:03 +0000 |
|---|---|---|
| committer | Pete Fritchman <petef@FreeBSD.org> | 2002-06-09 22:17:03 +0000 |
| commit | 0d73d2ce8e780e276b81b1a2f8207bd1a024fdb6 (patch) | |
| tree | 5cb950fc15666b2c9835fb57770944eefe98bee8 /net/tcptraceroute-devel/pkg-descr | |
| parent | bec2440e6c7e3b8b9624c20a80c0d65ba3267960 (diff) | |
| download | ports-0d73d2ce8e780e276b81b1a2f8207bd1a024fdb6.tar.gz ports-0d73d2ce8e780e276b81b1a2f8207bd1a024fdb6.zip | |
Notes
Diffstat (limited to 'net/tcptraceroute-devel/pkg-descr')
| -rw-r--r-- | net/tcptraceroute-devel/pkg-descr | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/net/tcptraceroute-devel/pkg-descr b/net/tcptraceroute-devel/pkg-descr index a25b74bedc74..b64b1179851b 100644 --- a/net/tcptraceroute-devel/pkg-descr +++ b/net/tcptraceroute-devel/pkg-descr @@ -1,17 +1,20 @@ -tcptraceroute is a traceroute implementation using TCP packets. +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 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. +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/ + +- Simon 'corecode' Schubert |