Снижение приоритета (предпочитаемости) IPv6 - Force IPv4

ForceIPv4.md

echo 'Acquire::ForceIPv4 "true";' | sudo tee /etc/apt/apt.conf.d/99force-ipv4

apt-get -o Acquire::ForceIPv4=true update

Acquire::ForceIPv4 and Acquire::ForceIPv6

apt.conf to write Acquire::ForceIPv4 "true";

host security.debian.org

security.debian.org has address 212.211.132.250 security.debian.org has address 217.196.149.233 security.debian.org has IPv6 address 2a02:16a8:dc41:100::233 security.debian.org has IPv6 address 2001:a78:5:1:216:35ff:fe7f:6ceb security.debian.org mail is handled by 10 mailly.debian.org. security.debian.org mail is handled by 10 muffat.debian.org.

host www.ripe.net

www.ripe.net has address 193.0.6.139 www.ripe.net has IPv6 address 2001:67c:2e8:22::c100:68b

http://ru.manpages.org/gaiconf/5

https://version6.ru/deprefer-ipv6

Prefer IPV4, edit nano /etc/gai.conf

precedence ::ffff:0:0/96 100

Prefer IPV6 for specific hosts

precedence 2001:470::/96 100

http proxy

edit nano /etc/apt/apt.conf.d/90httpproxy

Acquire::http { Proxy "http://[192.168.1.254]:3142"; };

edit nano /etc/hosts

130.89.149.226 ftp.debian.org
195.20.242.89 security.debian.org

http proxy

edit nano /etc/apt/apt.conf

Acquire::http::proxy "http://192.168.1.10:7777/"; Acquire::http::Timeout "10"; Acquire::ftp::Timeout "10";

https://github.com/jblakeman/apt-select

https://blog.kmonsoor.com/ubuntu-update-apt-get-server-to-use-fastest-mirror/