On 11-03-15 8:47 AM, Eric Weir wrote:
On Mar 14, 2011, at 3:24 PM, Bruce Walker wrote:
There's a "known" issue with an interaction between one particular Mac OS X
network config and many home routers. Mac OS X by default enables a TCP/IP performance
extension called RFC 1323. This sometimes triggers some odd behaviour in a number of
servers and router products, for example problems uploading things (eg delivering mail).
Luckily it's fairly easily turned off. You can do that from the command line
with this:
$ sudo sysctl -w net.inet.tcp.rfc1323=0
That change is temporary and will revert back to default behaviour on the next
reboot. If you find that that helps, you can make the change permanent by
putting this line of text ...
net.inet.tcp.rfc1323=0
... into the file /etc/sysctl.conf .
I guess it's not working afterall. It has started hanging up again. Thanks
again for the suggestion, though. Looked promising there at the beginning.
Sorry that didn't help Eric.
Worth a shot anyway. It made a huge difference for me when uploading to
Flickr and also when I was mounting disks remotely over sshfs. Somewhere
between my home system and work system there was some router or firewall
that didn't grok RFC 1323.
But that reminds me: I've changed my firewall since then, so I should
retest if I still need the hack myself.
Did you learn about tcpdump or Wireshark during your year of living
Linuxly? You could inspect a packet trace of the email transfer to see
if some other weirdness is going on.
-bmw
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