On Fri, Oct 14, 2005 at 12:09:36AM +0200, Florian Lohoff wrote:
> > echo 1 > /proc/sys/net/ipv4/ip_no_pmtu_disc
> > echo 4096 32767 > /proc/sys/net/ipv4/ip_local_port_range
> > at a new version of tftp-hpa which solves the PMTU problem by disabling it
> > only for the tftp client and introduces a new -R begin:end option which
> > allows to limit the port number range. The changes are about to become
> > available in the tftp-hpa git repository at
> > http://www.kernel.org/pub/scm/network/tftp/tftp-hpa.git; see also
> > http://www.linux-mips.org/wiki/ARC#tftp-hpa. Please send test reports to
> > email@example.com and firstname.lastname@example.org.
> I made a patch against tftpd-hpa for disabling path MTU discovery - Its
> in the Debian BTS:
> It should already be merged upstream. User "-F" to disable PMTUd.
Never made it to HPA - HPA wrote the patches for these two bugs himself
yesterday when I mentioned the problem to him. His patches are different
in the he disables PMTU discovery entirely - it's not useful for TFTP.
And your patch doesn't work around the other firmware bug which requires
restricting the port range. We had to get rid of the currently recommended
workaround - it seriously restricts the IP stack; cripples is probably
the right expression for busy servers.
Patch rotting in the Debian bugtracking system seems to become a classic ;-)