[ubuntu-in] 407 proxy authentication failure in Ubuntu software centre and IM even after applying systemwide proxy

[vishal.ud]

> What kind of proxy sever is it? I have seen such error only in my
> office where the proxy uses NTLM authentication. Synaptic can not
> communicate using NTLM protocol.
>
> You can use ntlmaps (or cntlm) as a bridge between Synaptic and your proxy.
>
>
> Onkar
>
>   

We use squid with NTLM auth and i face no such issues in any of the 
Ubuntu releases since 8.10 . The trick is to either apply the proxy 
system wide or specifically make Synaptic use the proxy