My college recently switched from ISP provided IPs to its own. 202.128.71.x, 202.128.72.x, 202.128.73.x and 202.128.79.x from ISP to there own 203.215.52.0/22. The switch seemed to go fine, but have found a few sites that are giving us 503 errors. I have gotten around the problem by using rinetd to redirect a port to the squid server on my home machine for these sites, and one of our ISPs has given access to there proxy server so now using that, but ideally would like to come up with what is causing the problem. I have squid servers on campus, and was wondering if there was a way to have them in the event of not being able to connect to a site, it they could automatically try going thru the ISPs proxy? The traceroutes to the sites that don't work get to the point right before they should, 1 hop less. The latest problem site is strange. Going to tinyurl.com sometimes gives the IP address 64.62.243.89, which works fine. But other times it gives 64.62.243.91, which doesn't from the college. Both work fine from home. In running wireshark, the 89 address will send and receive pings and responses, but the 91 only shows the sends with no receive responses. nmap shows no open ports on the 91 from college, but from home it does? Perhaps someone might have a way of figuring out what the issue is. Our IT guys say they are not blocking these IPs, and even they have found sites that don't work for them. Thanks. +----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center mailto:mikes@xxxxxxxxxxxxxxxx mailto:msetzerii@xxxxxxxxx http://www.guam.net/home/mikes Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +----------------------------------------------------------+ http://setiathome.berkeley.edu (Original) Number of Seti Units Returned: 19,471 Processing time: 32 years, 290 days, 12 hours, 58 minutes (Total Hours: 287,489) BOINC@HOME CREDITS SETI 12029945.909740 | EINSTEIN 7623371.809852 ROSETTA 4388616.446766 | ABC 12124980.377137
