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How does traceroute work?

Feb 28, 2018 by David Farrell

networking
traceroute
udp
tcp
icmp

Identifying which routers process an IP request

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Port scanning with Perl, Part II

Aug 15, 2015 by David Farrell

security
tcp
icmp
udp
nmap

Towards building a professional tool

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Host discovery with broadcast and echo

Jul 6, 2015 by David Farrell

security
tcp
infosec
icmp
socket
ping
udp

Implemented with core Perl only

Read it
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