Hi, combinat.math.washington.edu is now fixed. For some mysterious reasons the ufw firewall was active, with evidently *no* rules, and it was blocking most everything. I don't know 100% for certain why this happened; however, I've just done:
apt-get remove unattended-upgrades ufw so it is unlikely to happen again. Note that there was no downtime or interruption of anybody's jobs, and this was not caused by over-use. (This is the only problem we have ever had so far with combinat, by the way!) root@combinat:/home/wstein# uptime 08:55:45 up 18 days, 12:58, 4 users, load average: 37.00, 37.01, 37.07 I will be scheduling some (about 2 minutes -- just the time to reboot once) of downtime for combinat, since I have to reset the UPS it is connected to, in order to debug a UPS battery issue. That will probably be in about a week, and there will be an announcement. William On Wed, Oct 3, 2012 at 6:52 AM, William Stein <[email protected]> wrote: > > > On Wednesday, October 3, 2012, Dima Pasechnik <[email protected]> wrote: >> see >> https://groups.google.com/d/topic/sagemath-users/9gOocpRm4KE/discussion > > My current hypothesis is that Ubuntu automatic security updates (or > something else stupid) somehow activated some sort of overly aggressive > firewall rules, since I ran into the same problem on four other servers I > have running ubuntu with automatic security updates (I ink). Anyway, the > machines are now way too secure! I'll find out soon enough though (I > should have this fixed in about two hours). > > If you are good at using Dell iDrac remote management with Linux, please > email me... > > > >> >> On Wednesday, 3 October 2012 18:15:47 UTC+8, fhivert wrote: >>> >>> Hi there, >>> >>> The combinat machine seems to ping but doesn't answer neither to the web, >>> nor >>> to ssh. Can a local guy investigate and maybe relaunch it ? >>> >>> Thanks, >>> >>> Florent >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-devel" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> Visit this group at http://groups.google.com/group/sage-devel?hl=en. >> >> >> > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-devel?hl=en.
