[fpc-devel] Server availability

[Alexander Klenin]

On Tue, Sep 6, 2011 at 22:43, Jonas Maebe <jonas.maebe at elis.ugent.be> wrote:
> There is one known problem: the server is behind a brain dead firewall,
> which drops most icmp packets (except for ping). This includes the
> "fragmentation needed" packets used for path mtu discovery
> (http://www.networksorcery.com/enp/rfc/rfc1191.txt).
>
> We have enabled TCP-based mtu discovery
> (http://tools.ietf.org/html/rfc4821), but it appears to be slower.
> Alternatively, you can try to clamp the maximum  segment size of all tcp
> connections manually: http://lartc.org/howto/lartc.cookbook.mtu-mss.html
> (try 1400 or so, and work up from there). It will slightly reduce the
> efficiency of your connection though (for all tcp connections, also to other
> servers).

I am on Windows, so I have enabled EnablePMTUBHDetect parameter instead,
as per http://support.microsoft.com/kb/314053

It have helped somewhat -- now instead of waiting for the full page,
half of the page is downloaded, and then the waiting starts.
I am not a TCP expert, so have no idea what may cause this.

-- 
Alexander S. Klenin