9 lines
495 B
Text
9 lines
495 B
Text
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The widespread use of firewalls on the modern Internet, many of the
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packets that traceroute(8) sends out end up being filtered, making it
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impossible to completely trace the path to the destination. However,
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in many cases, these firewalls will permit inbound TCP packets to
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specific ports that hosts sitting behind the firewall are listening for
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connections on. By sending out TCP SYN packets instead of UDP or ICMP
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ECHO packets, tcptraceroute is able to bypass the most common firewall
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filters.
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