Ubuntu – I can’t add PPA repository behind the proxy


I'm trying to add the ppa repository (as a root) with the following command:

export HTTP_PROXY="http://firstname.surname@xxx.com:my_pass@165.x.x.232:8080"
add-apt-repository ppa:nilarimogard/webupd8

Traceback (most recent call last):
  File "/usr/bin/add-apt-repository", line 125, in <module>
    ppa_info = get_ppa_info_from_lp(user, ppa_name)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 84, in get_ppa_info_from_lp
pycurl.error: (56, 'Received HTTP code 407 from proxy after CONNECT')

Unfortunately it doesn't work. Looks like curl is connecting to the proxy, but the proxy says that Authentication is Required.
I've tried with .curlrc, http_proxy env instead, but it doesn't work.

strace -e network,write -s1000 add-apt-repository ppa:nilarimogard/webupd8
connect(4, {sa_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("165.x.x.232")}, 16) = -1 EINPROGRESS (Operation now in progress)
getsockopt(4, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
getpeername(4, {sa_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("165.x.x.232")}, [16]) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(46025), sin_addr=inet_addr("")}, [16]) = 0
sendto(4, "CONNECT launchpad.net:443 HTTP/1.1\r\nHost: launchpad.net:443\r\nUser-Agent: PycURL/7.22.0\r\nProxy-Connection: Keep-Alive\r\nAccept: application/json\r\n\r\n", 146, MSG_NOSIGNAL, NULL, 0) = 146
recvfrom(4, "HTTP/1.1 407 Proxy Authentication Required\r\nProxy-Authenticate: BASIC realm=\"proxy\"\r\nCache-Control: no-cache\r\nPragma: no-cache\r\nContent-Type: text/html; charset=utf-8\r\nProxy-Connection: close\r\nSet-Cookie: BCSI-CS-91b9906520151dad=2; Path=/\r\nConnection: close\

Maybe it's because there is @ sign in the username? Wget works with proxy fine.

How do I add a repository from behind a proxy?


Ubuntu 12.04

curl 7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/ libidn/1.23 librtmp/2.3

curl Features: GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP


When added credentials into .curlrc

cat ~/.curlrc 
proxy = 165.x.x.232:8080
proxy-user = name.surname@xxx.com:mypass0

It seems to work for the plain curl.

curl www.google.com | head

* Proxy auth using Basic with user 'name.surname@xxx.com'
GET HTTP://www.google.com HTTP/1.1
Proxy-Authorization: Basic cmFmYWwud2llY3pvcmVrQHVi...3R0RDA=
HTTP/1.1 302 Found


curl -v https://www.google.com | head
* Establish HTTP proxy tunnel to www.google.com:443
* Proxy auth using Basic with user 'name.surname@xxx.com'
> CONNECT www.google.com:443 HTTP/1.1
> Host: www.google.com:443
> Proxy-Authorization: Basic cmFmYWwud2llY3pvcmVrQHVi...3R0RDA=
    > User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1     zlib/ libidn/1.23 librtmp/2.3
> Proxy-Connection: Keep-Alive
< HTTP/1.1 200 Connection established
* Proxy replied OK to CONNECT request
* successfully set certificate verify locations

But still doesn't work when adding ppa certificate.

pycurl.error: (56, 'Received HTTP code 407 from proxy after CONNECT')


Headers sent:

CONNECT launchpad.net:443 HTTP/1.1
Host: launchpad.net:443
Proxy-Authorization: Basic cGVvcGxlcmVhbGx5c2hvdWxkQHNhbml0aXplcG9zdHM=
User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/ libidn/1.23 librtmp/2.3
Proxy-Connection: Keep-Alive


HTTP/1.1 200 Connection established


Headers sent:

CONNECT launchpad.net:443 HTTP/1.1
Host: launchpad.net:443
User-Agent: PycURL/7.22.0
Proxy-Connection: Keep-Alive
Accept: application/json


HTTP/1.1 407 Proxy Authentication Required
Proxy-Authenticate: BASIC realm="proxy"

It seems that PyCURL doesn't re-send any Authorization when requested.

Best Answer

Workaround if apt-get still works behind the proxy

  • add sources manually to /etc/apt/sources.list
  • add gpg key

Adding sources manually

I think on launchpad.net every ppa still contains a small description how to add sources manually. The launchpad site for your mentioned ppa ppa:nilarimogard/webupd8 is https://launchpad.net/~nilarimogard/+archive/webupd8. If you scroll down you see an expandable label Technical details about this PPA. If you expand it you find the description how to add sources manually. Add the following lines to mentioned /etc/apt/sources.list

deb http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu quantal main 
deb-src http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu quantal main 

Of course you have to adjust quantal to whatever version you are currently using.

Adding the Signing Key

The description also contains a signing key. This is important, so that your system can always verify that you actually access a trustworthy ppa-address. In case of your ppa that is 1024R/4C9D234C(can also be found under Technical details about this PPA), where the number behind the slash is important. You can add the fingerprint via the apt-key program. Typically you would perform the following command

 sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 4C9D234C

Adding if apt-key doesn't work through proxy

Since you already had problems with the add-apt-repository program this might not work either. So instead you can download and add the 1024 Bit key manually. If wget works you can do that in one step.

wget "http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0x531EE72F4C9D234C" -O out && sudo apt-key add out && rm out

Otherwise safe "http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0x531EE72F4C9D234C" in e.g. /path/key and use sudo apt-key add /path/key to add it.

Close with the usual

Afterwards you have to update the repository information apt-get update and then you should be able to download the packages.


My personal favorite on how to use the packaging mechanism (sadly in German): http://wiki.ubuntuusers.de/Paketquellen_freischalten/PPA

The launchpad version also mentions all the important points: https://help.launchpad.net/Packaging/PPA/InstallingSoftware

Since it is untypical to use apt-key in the described way I only found the information in the man pages, man apt-key.

Related answer that pretty much describes the standard way to install ppa's manually: https://askubuntu.com/a/38029/128349

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