Hi Haochen, On Mon, May 18, 2026 at 08:10:10AM +0000, Jiang, Haochen via Gcc wrote: > Recently I am building gcc on AWS systems. However, when I am > trying to download gcc prereq, I got: > > $ ./contrib/download_prerequisites > https://gcc.gnu.org/pub/gcc/infrastructure/gmp-6.3.0.tar.bz2: > 2026-05-18 08:02:11 ERROR 403: Forbidden. > error: Cannot download gmp-6.3.0.tar.bz2 from > https://gcc.gnu.org/pub/gcc/infrastructure/ > > This did not happen on weekends. It just happens today. > > Is some AWS IP prohibited due to bot attack just today? Or I met > bad luck (I believe not since two AWS nodes reporting to me that)?
Yes, AWS is problematic because they sometimes host botnets which we might have to block when they get past our other defenses. At the moment the following AWS related ip/blocks are in place: # Specific Amazon AWS ips that hammer /git 35.89.156.172 34.218.210.115 # 2026-01-28 git-over-http DOS, AWS 35.161.163.0/24 54.213.72.0/24 52.36.47.0/24 # AWS git history/blame scraper 35.80.0.0/12 34.192.0.0/10 52.0.0.0/10 54.200.0.0/14 # Amazon Technologies Inc. (AT-88-Z) 13.24.0.0/13 # Amazon Data Services NoVa (ADSN-1) 100.24.0.0/13 If you are using one of these ip/ranges for normal usage and not scraper bots, then let us know and we'll remove the blocks. Cheers, Mark
