Jessie unable to update via squid proxy
Small bit of background. Wheezy has no problem at all using the proxy. 
Nor does Ubuntu, SUSE or Centos. Every Jessie install I have built has 
been unable to use the proxy. It basically stops at "Hit 
http://security.debian.org jessie/updates/main Translation-en" at "100% 
[Waiting for headers]"
The squid logs are not showing any issues. I have configured the proxy 
settings for apt in various ways depending on which article I am 
currently looking at. None so far have been able to correct the problem.
If I configure wgetrc to use the proxy, wget can successfully download 
the file. My current workaround is a list of systems which bypass the 
proxy altogether. This works fine but is not a long term solution by any 
stretch. So below are the various entries I have made so far in my 
attempts to configure apt
/etc/apt/apt.conf
Acquire::http::Proxy "http://192.168.8.6:3128/";
Acquire::https::Proxy "http://192.168.8.6:3128/";
Acquire::ftp::Proxy "http://192.168.8.6:3128/";
/etc/apt/apt.conf.d/01proxy
Acquire::http::Proxy "http://192.168.8.6:3128";
/etc/apt/apt.conf.d/70debconf
// Pre-configure all packages with debconf before they are installed.
// If you don't like it, comment it out.
DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt || true";};
Acquire::http::Proxy "http://192.168.8.6:3128";
The squid access.log shows the following during an update
1485172349.591     19 192.168.10.98 TCP_MISS/404 454 GET 
http://ftp.uk.debian.org/debian/dists/jessie/InRelease - 
DIRECT/78.129.164.123 text/html
1485172349.598      6 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 295 GET 
http://ftp.uk.debian.org/debian/dists/jessie-updates/InRelease - 
DIRECT/78.129.164.123 -
1485172349.621      4 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 293 GET 
http://ftp.uk.debian.org/debian/dists/jessie/Release.gpg - 
DIRECT/78.129.164.123 -
1485172349.627      4 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 295 GET 
http://ftp.uk.debian.org/debian/dists/jessie/Release - 
DIRECT/78.129.164.123 -
1485172349.648      6 192.168.10.98 TCP_REFRESH_UNMODIFIED/200 15785 GET 
http://ftp.uk.debian.org/debian/dists/jessie-updates/main/source/Sources.xz 
- DIRECT/78.129.164.123 application/octet-stream
1485172349.679      8 192.168.10.98 TCP_REFRESH_UNMODIFIED/200 7284 GET 
http://ftp.uk.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages.diff/Index 
- DIRECT/78.129.164.123 application/octet-stream
1485172349.687      8 192.168.10.98 TCP_REFRESH_UNMODIFIED/200 3071 GET 
http://ftp.uk.debian.org/debian/dists/jessie-updates/main/i18n/Translation-en.diff/Index 
- DIRECT/78.129.164.123 application/octet-stream
1485172349.697      8 192.168.10.98 TCP_MISS/416 316 GET 
http://ftp.uk.debian.org/debian/dists/jessie/main/source/Sources.xz - 
DIRECT/78.129.164.123 text/html
1485172349.806    233 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 323 GET 
http://security.debian.org/dists/jessie/updates/InRelease - 
DIRECT/128.61.240.73 -
1485172349.937    102 192.168.10.98 TCP_REFRESH_MODIFIED/416 654 GET 
http://security.debian.org/dists/jessie/updates/main/source/Sources.bz2 
- DIRECT/128.61.240.73 text/html
1485172350.043    105 192.168.10.98 TCP_REFRESH_MODIFIED/416 654 GET 
http://security.debian.org/dists/jessie/updates/main/binary-amd64/Packages.bz2 
- DIRECT/128.61.240.73 text/html
1485172350.147    102 192.168.10.98 TCP_REFRESH_MODIFIED/416 654 GET 
http://security.debian.org/dists/jessie/updates/main/i18n/Translation-en.bz2 
- DIRECT/128.61.240.73 text/html
1485172350.250    101 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 324 GET 
http://security.debian.org/dists/jessie/updates/main/source/Sources.bz2 
- DIRECT/128.61.240.73 -
1485172350.352    101 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 324 GET 
http://security.debian.org/dists/jessie/updates/main/binary-amd64/Packages.bz2 
- DIRECT/128.61.240.73 -
1485172350.454    101 192.168.10.98 TCP_REFRESH_UNMODIFIED/304 324 GET 
http://security.debian.org/dists/jessie/updates/main/i18n/Translation-en.bz2 
- DIRECT/128.61.240.73 -
Before anyone points it out, we use a /22 so the system can resolve the 
proxy with no problems.
Any pointers would be greatly appreciated.
Regards
Neil
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