Re: Offline mode + HTTPS does not seem possible

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Oh, great, I followed that link to mitmproxy.org... I'm sure I'm on some go=
vernment list now. ;-)

OK, seriously, that sounds like a fun hack. I'm not much of a Pythonista, b=
ut I'd love an excuse to play with it a bit. And this sounds like fun. If y=
ou need a co-conspirator, let me know.

--Hardy

________________________________
From: [email protected] [[email protected]] on behalf of Donovan Baarda [ab=
[email protected]]
Sent: Thursday, July 09, 2015 8:00 PM
To: Pottinger, Hardy J.
Cc: [email protected]
Subject: Re: [Polipo-users] Offline mode + HTTPS does not seem possible

Unfortunately, the enthusiastic push for better internet security with http=
s is breaking cacheability. None of the people serving this content care, b=
ecause traffic is one of their metrics for success, and they can cache righ=
t up to their boundary by terminating the ssl at their edge, so they don't =
care if it's non-cachable beyond there. Companies like Google "solve" the c=
aching problem by just pushing their "edge" further and further out, owning=
 more and more of the internet infrustructure between customers and their s=
ervers.

I've been considering trying to create an unholy chimera by duct-taping pol=
ipo and https://mitmproxy.org/ together with Python to fix this.

I'm getting sick of the 5 different android devices in the house insisting =
on downloading all the firmware and app updates 5x over https. This was par=
ticularly bad when I was briefly connected using stupidly expensive 4G and =
found the android devices had significantly contributed to exhausting my 5G=
B pre-paid quota in less than 2 days.

Things like mitmproxy are pretty bad from a security perspective, but unfor=
tunately that's the only way to work around this. Unfortunately the push fo=
r more security is working on breaking them too. Cert-pinning is the "magic=
 solution" to breaking on-the-fly cert generation used by mitmproxy, and it=
's already starting to appear in chrome etc. Not sure how easy it's going t=
o be to work around.


On 10 July 2015 at 04:38, Pottinger, Hardy J. <[email protected]<mai=
lto:[email protected]>> wrote:
Hi, I'm trying to use Polipo as a way to facilitate offline access to code =
repositories (Maven central, github, etc) for my Vagrant-managed Virtualbox=
 development environment. Our build process uses Grunt and Bower to pull in=
 various pieces of front-end "stuff" and many of these URLs are https URLs =
to github, for example:

https://github.com/Modernizr/Modernizr.git

Now, I can have Polipo running, and the network on, on my guest machine I c=
an successfully run

wget https://github.com/Modernizr/Modernizr.git

Which, I would assume, is caching the content. I then disable my network co=
nnection on my host machine, put Polipo in offline mode, and then re-attemp=
t a wget of Modernizer... but I get the following:

Connecting to 10.0.2.2:8123... connected.
Proxy tunneling failed: Couldn't connect: Network is unreachableUnable to e=
stablish SSL connection

Running a tail -f on /var/log/polipo/polipo.log does not show me anything d=
uring this error.

Here is the only additions I've made to my /etc/polipo/config file:

disableIndexing =3D false
disableServersList =3D false
dnsUseGethostbyname =3D reluctantly
dnsQueryIPv6 =3D no
dnsQueryIPv6 =3D reluctantly
proxyOffline =3D yes

Any advice would be much appreciated, thanks!

On a positive note, despite not getting offline caching to work, I *have* n=
oticed a considerable bump in compile performance. Down from 5 minutes to 2=
 minutes, with tests turned on. So, I'm moderately pleased about that. But,=
 i would like to figure out this offline proxy stuff. :-)

--Hardy

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t>
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--
Donovan Baarda <[email protected]<mailto:[email protected]>=
>

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ize: 12pt;">
Oh, great, I followed that link to mitmproxy.org... I'm sure I'm on some go=
vernment list now. ;-)<br>
<br>
OK, seriously, that sounds like a fun hack. I'm not much of a Pythonista, b=
ut I'd love an excuse to play with it a bit. And this sounds like fun. If y=
ou need a co-conspirator, let me know.<br>
<br>
--Hardy<br>
<br>
<div style=3D"font-family: Times New Roman; color: #000000; font-size: 16px=
">
<hr tabindex=3D"-1">
<div style=3D"direction: ltr;" id=3D"divRpF650366"><font face=3D"Tahoma" co=
lor=3D"#000000" size=3D"2"><b>From:</b> [email protected] [[email protected]=
m] on behalf of Donovan Baarda [[email protected]]<br>
<b>Sent:</b> Thursday, July 09, 2015 8:00 PM<br>
<b>To:</b> Pottinger, Hardy J.<br>
<b>Cc:</b> [email protected]<br>
<b>Subject:</b> Re: [Polipo-users] Offline mode &#43; HTTPS does not seem p=
ossible<br>
</font><br>
</div>
<div></div>
<div>
<div dir=3D"ltr">Unfortunately, the enthusiastic push for better internet s=
ecurity with https is breaking cacheability. None of the people serving thi=
s content care, because traffic is one of their metrics for success, and th=
ey can cache right up to their boundary
 by terminating the ssl at their edge, so they don't care if it's non-cacha=
ble beyond there. Companies like Google &quot;solve&quot; the caching probl=
em by just pushing their &quot;edge&quot; further and further out, owning m=
ore and more of the internet infrustructure between
 customers and their servers.
<div><br>
</div>
<div>I've been considering trying to create an unholy chimera by duct-tapin=
g polipo and
<a href=3D"https://mitmproxy.org/" target=3D"_blank">https://mitmproxy.org/=
</a> together with Python to fix this.&nbsp;</div>
<div><br>
</div>
<div>I'm getting sick of the 5 different android devices in the house insis=
ting on downloading all the firmware and app updates 5x over https. This wa=
s particularly bad when I was briefly connected using stupidly expensive 4G=
 and found the android devices had
 significantly contributed to exhausting my 5GB pre-paid quota in less than=
 2 days.</div>
<div><br>
</div>
<div>Things like mitmproxy are pretty bad from a security perspective, but =
unfortunately that's the only way to work around this. Unfortunately the pu=
sh for more security is working on breaking them too. Cert-pinning is the &=
quot;magic solution&quot; to breaking on-the-fly
 cert generation used by mitmproxy, and it's already starting to appear in =
chrome etc. Not sure how easy it's going to be to work around.</div>
<div><br>
</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On 10 July 2015 at 04:38, Pottinger, Hardy J. <s=
pan dir=3D"ltr">
&lt;<a href=3D"mailto:[email protected]" target=3D"_blank">Pottinger=
[email protected]</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex; border-left:1=
px #ccc solid; padding-left:1ex">
Hi, I'm trying to use Polipo as a way to facilitate offline access to code =
repositories (Maven central, github, etc) for my Vagrant-managed Virtualbox=
 development environment. Our build process uses Grunt and Bower to pull in=
 various pieces of front-end &quot;stuff&quot;
 and many of these URLs are https URLs to github, for example:<br>
<br>
<a href=3D"https://github.com/Modernizr/Modernizr.git" rel=3D"noreferrer" t=
arget=3D"_blank">https://github.com/Modernizr/Modernizr.git</a><br>
<br>
Now, I can have Polipo running, and the network on, on my guest machine I c=
an successfully run<br>
<br>
wget <a href=3D"https://github.com/Modernizr/Modernizr.git" rel=3D"noreferr=
er" target=3D"_blank">
https://github.com/Modernizr/Modernizr.git</a><br>
<br>
Which, I would assume, is caching the content. I then disable my network co=
nnection on my host machine, put Polipo in offline mode, and then re-attemp=
t a wget of Modernizer... but I get the following:<br>
<br>
Connecting to 10.0.2.2:8123... connected.<br>
Proxy tunneling failed: Couldn't connect: Network is unreachableUnable to e=
stablish SSL connection<br>
<br>
Running a tail -f on /var/log/polipo/polipo.log does not show me anything d=
uring this error.<br>
<br>
Here is the only additions I've made to my /etc/polipo/config file:<br>
<br>
disableIndexing =3D false<br>
disableServersList =3D false<br>
dnsUseGethostbyname =3D reluctantly<br>
dnsQueryIPv6 =3D no<br>
dnsQueryIPv6 =3D reluctantly<br>
proxyOffline =3D yes<br>
<br>
Any advice would be much appreciated, thanks!<br>
<br>
On a positive note, despite not getting offline caching to work, I *have* n=
oticed a considerable bump in compile performance. Down from 5 minutes to 2=
 minutes, with tests turned on. So, I'm moderately pleased about that. But,=
 i would like to figure out this
 offline proxy stuff. :-)<br>
<br>
--Hardy<br>
<br>
---------------------------------------------------------------------------=
---<br>
Don't Limit Your Business. Reach for the Cloud.<br>
GigeNET's Cloud Solutions provide you with the tools and support that<br>
you need to offload your IT needs and focus on growing your business.<br>
Configured For All Businesses. Start Your Cloud Today.<br>
<a href=3D"https://www.gigenetcloud.com/" rel=3D"noreferrer" target=3D"_bla=
nk">https://www.gigenetcloud.com/</a><br>
_______________________________________________<br>
Polipo-users mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank">Pol=
[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/polipo-users" rel=
=3D"noreferrer" target=3D"_blank">https://lists.sourceforge.net/lists/listi=
nfo/polipo-users</a><br>
<br>
</blockquote>
</div>
<br>
<br clear=3D"all">
<div><br>
</div>
-- <br>
<div class=3D"gmail_signature">Donovan Baarda &lt;<a href=3D"mailto:abo@min=
kirri.apana.org.au" target=3D"_blank">[email protected]</a>&gt;</di=
v>
</div>
</div>
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Don't Limit Your Business. Reach for the Cloud.
GigeNET's Cloud Solutions provide you with the tools and support that
you need to offload your IT needs and focus on growing your business.
Configured For All Businesses. Start Your Cloud Today.
https://www.gigenetcloud.com/
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