Testing if a port can be reached, using built-in tools other than ol' telnet

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  • tcping

    Check if a desired port is reachable via TCP (by mkirchner)

  • Ha! This is probably the first serious problem I ever tackled with an open source contribution! The year was 2002, the 2.4 Linux kernel had just been released and I was making money on the side building software monitoring a few thousand mostly Solaris hosts for a large German car manufacturer. Everything was built in parallel ksh code, “deployed” to Sun E10Ks with Solaris 8, mostly kicked off by cron and keeping total script runtime down to avoid process buildup and delay was critical. The biggest offender: long timeouts for host/port combinations that would sporadically not be available.

    Eventually, I grabbed W. Richard Stevens’ UNIX network programming book and created tcping [0]. FreeBSD, NetBSD, a series of Linux distros picked it up at the time and it was steady decline from there… good times!

    [0]: https://github.com/mkirchner/tcping

  • dstp

    🧪 Run common networking tests against any site.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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  • sock

    Richard Stevens' sock program in TCP/IP Illustrated Vol. 1 from Christian Kreibich(http://www.icir.org/christian/sock.html) (by keyou)

  • When I was reading his books I used the utility he wrote, sock.

    https://github.com/keyou/sock

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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