Hi, it seems that gcc.gnu.org is actively blocking any HTTP traffic from MIT Lincoln Laboratory, which all originates from our proxy server, llproxy.ll.mit.edu (129.55.200.20). This has been happening for at least the past month. Can you please check your server configuration to ensure that this address has not been accidentally blacklisted? Thanks, David -- David Ward ‒ Associate Staff Tactical Networks Group MIT Lincoln Laboratory Office: 781-981-4266 Mobile: 781-999-1925 E-mail: david.ward@ll.mit.edu -------- Forwarded Message -------- Subject: RE: Proxy Causes HTTP 403 Errors from gcc.gnu.org - Ticket # 152319 Date: Mon, 11 Jan 2016 13:28:55 +0000 From: Balara, Nicholas - 1160 - MITLL To: Ward, David - 0665 - MITLL David, On 12/14/15 we confirmed that this site can be accessed from outside the lab (on mobile phone and from SFAVC). We also confirmed that traffic from the site to our external proxy was coming back with a 403 forbidden. Please let us know if you have any other questions. Regards, Nick Balara Information Services Department IT Security Team MIT Lincoln Laboratory 244 Wood Street Lexington, MA 02420 781-981-4225 Nicholas.Balara@ll.mit.edu