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40 lines
1.1 KiB
Markdown
40 lines
1.1 KiB
Markdown
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---
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title: Commonly open port ranges
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excerpt:
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Some applications such as MOSH or KDE Connect are just so practical, but they
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open so many ports in firewall and who is to guarantee lazy sysadmin won't
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abuse those for something else without even thinking about backdoors?
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layout: mini
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permalink: /n/annoying-ports.html
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sitemap: true
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lang: en
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---
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# {{ page.title }}
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_{{ page.excerpt }}_
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The following list is based on my other notes and `/usr/lib/firewalld/services/`
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- mosh: UDP ports `60000-61000`
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- KDE Connect: TCP & UDP ports `1714-1764`
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## Services doing it right?
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```xml
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<?xml version="1.0" encoding="utf-8" ?>
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<service>
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<short>Multicast DNS (mDNS)</short>
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<description>mDNS provides the ability to use DNS programming interfaces, packet formats and operating semantics in a small network without a conventional DNS server. If you plan to use Avahi, do not disable this option.</description>
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<port
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protocol="udp"
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port="5353" />
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<destination
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ipv4="224.0.0.251"
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ipv6="ff02::fb" />
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</service>
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```
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Note the destinations! Maybe I should copy that for some of my services like
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NTP.
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