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+# apt-cacher-ng
+Default port 3142
+## Deb(ubuntu/debian) repos work out of the box server sided
+### client 
+`echo 'Acquire::http::Proxy "http://<ip>:<port>";' > /etc/apt/apt.conf.d/01proxy`
+
+## For Centos are modifications needed
+### Server
+`curl https://www.centos.org/download/full-mirrorlist.csv | sed 's/^.*"http:/http:/' | sed 's/".*$//' | grep ^http >/etc/apt-cacher-ng/centos_mirrors`
+
+SSL Passthrough
+#### /etc/apt-cacher-ng/acng.conf
+```
+VfilePatternEx: ^/\?release=[0-9]+&arch=
+VfilePatternEx: ^(/\?release=[0-9]+&arch=.*|.*/RPM-GPG-KEY-.*|/metalink\?repo=epel\$
+VfilePatternEx = (^|.*/)repodata/.*\.(yaml|yml)(\.gz|\.bz2|\.lzma|\.xz)?$
+Remap-centos: file:centos_mirrors /centos
+
+#PassThroughPattern: .* # this would allow CONNECT to everything
+
+```
+
+### Client (installer)
+use http://mirror.centos.org/centos/8/BaseOS/x86_64/os/ as repo and set proxy to <ip>:<port>
+
+### Client (DNF)
+make sure to set repos to use base url
+add folowing to /etc/dnf/dnf.conf
+```
+proxy=http://<ip>:<port>
+```
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