Ensure that swarm services are bound to a specific host interface

SedangLevel 1Tinjauan manualdocker

Deskripsi

By default, Docker swarm services will listen on all interfaces on the host. This may not be necessary for the operation of the swarm where the host has multiple network interfaces. When a swarm is initialized the default value for the --listen-addr flag is 0.0.0.0:2377 which means that swarm services will listen on all interfaces on the host. Reported as a manual review item: the audit needs a site-specific judgement.

Cara pemeriksaan

Metode audit: Tinjauan manual

Rekomendasi ini tidak dapat diperiksa secara otomatis. Pemindaian akan menampilkannya beserta petunjuk ini saat Anda memberikan opsi --include-manual.

You should check the network listener on port 2377 (the default for docker swarm) and 7946 (container network discovery), and confirm that it is only listening on specific interfaces. For example, in this could be done using the following command: ss -lp | grep -iE ':2377|:7946'

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Resolving this issues requires re-initialization of the swarm, specifying a specific interface for the --listen-addr parameter.

Properti

Sistem operasi: Apa saja
Tag: dockermanual
Referensi: CIS Docker Benchmark v1.9.0 - 7.2 Ensure that swarm services are bound to a specific host interface