On Fri, 01 Mar 2013 13:57:26 +0100, Ljubomir Ljubojevic wrote: > It is worth noting that www.centos.org was inaccessible from Serbia and > http://www.downforeveryoneorjustme.com/centos.org on 27.01.2013 around > 16:30, for about 1-2 hours. I can see pretty bad connectivity for Centos.org over here: http://www.isitdownrightnow.com/centos.org.html Here's a screenshot of the results: http://www1.picturepush.com/photo/a/12306664/img/12306664.png I'm not on any of these blacklists: http://multirbl.valli.org http://www.lookinglass.org In addition, I had asked some friends, who reported back: APPLE: > For what it is worth I can't get to centos.org from Apple's network > either. The traceroute finally gets through after 42 hops but the > servers are dropping the connection immediately. > Me thinks it is a centros.org problem and not an ISP issue. MAXIM: > Ha - just checked. I can't from Maxim either. GOOGLE: > Works OK for me from google, as long as I spell it right this time! A neighborly friend tested similar situations: > While it is possible that the laptop had a temporary problem wherein > it had set the TimeToLive (TTL) of the packets to 19, that also seems > like a long shot. > > However, trying a reboot if/when it happens again to rule out laptop > fatigue is another test to try. Also, finding a site that has more > than 20 hops would also be a test of that. It turns out it isn't all > that easy to find a site with that many hops. Traceroute deliberately > plays with the TTL number, so it would seem like a long shot if > traceroute also showed the problem, as it does in this case. > > Nonetheless, if it happens again, try a traceroute to tempotv.com.tr, > which takes 23 hops from my computer. > > I can get to Iran in 24 hops: traceroute www.gu.ac.ir. > On the Internet, centos.org is as far away as Pakistan: > traceroute www.gu.edu.pk. > > Some routers drop ICMP packets when they get busy, or rate-limit > the replies. You could have been trying to get to centos.org while > they were being hit by a DDOS attack. Routers would automatically > drop whole blocks of IPs for a short while to cope with the problem. > > ...and just for fun, let's try Malaysia: > > C:\temp>tracert -h 255 www.tourism.gov.my > > Tracing route to www.tourism.gov.my [168.63.252.50] > over a maximum of 255 hops:
