On Sep 15, 2010, Mark (obsd) <openbsd-l...@nerdish.us> wrote: >> bsd 7% |** | 677 KB - stalled - >> > > At first glance, that symptom (stalled data transfers) looks really > similar to something we battled earlier this year with our mail servers, > wound up being a firewall (theirs) between us and another large > company that was breaking TCP window scaling. > > It's been a while since I've fired up the bsd installer, I don't know if > that ramdisk environment has the sysctl command or not? You can > disable window scaling if it does, see if that helps things along. I'm > running a rather old install right now which I'll be replacing when 4.8 > releases, but on this old box it looks like the sysctl to turn off window > scaling is net.inet.tcp.rfc1323=0 > > Hope that helps, or at least provides clues,Mark
Thanks Mark. The sysctl command is present, but seems to support an abbreviated list of parameters. I do not get any error message if I try to set net.inet.tcp.rfc1323=0, but neither can I list the value of that parameter before or after. It appears that the set command is simply ignored. Your comments about firewalls were interesting, however, so I tried running the install from a different network (also behind NAT). The problem persisted, as it did when I tried connecting directly to my ISP with no intervening router or firewall. Hyper-V-Server also has its own firewall, but turning it off also did not help. I got to 100% downloading bsd, but then it just hung there at 'getting bsd.rd...'. I would welcome further suggestions anyone cares to offer. Thanks, Richard Koett.
