On Tue, 16 Dec 2008, Brian Foster wrote:
> not quite. he *speculated* that the firewall's complaint
> meant it was having to "remember" too many outstanding
IP Fragments or IP/TCP/? packets (as per a previous email)?
Confusing though it may be, these terms mean different things.
> be (part of ?) the issue!
>> both my workstation and the IMAP/SMTP-server were doing
> p-mtu-d. here are the results of our tests:
>> W = Workstation's .../ip_no_pmutu_disc setting (≡ ¬p-mtu-d).
> S = IMAP/SMTP-Server's .... .
> B = firewall Bypass (workstation whitelisted): Y(es) N(no).
> R = Receiving e-mail (IMAP download): ✓ works, ✗ doesn't work.
> T = Transmitting e-mail (SMTP upload): .... .
>> Tst W S B ⇒ R T Comments...
>  ? ? N ✓ ✓ Historical situation until some unknown event.
>  0 0 N ✗ ✓ "Original" situation that started all this.
>  0 0 Y ✓ ✗
>  1 0 Y ✓ ✓ Yeah!
>  1 1 N ✗ ✓ WTF ?
My font doesn't have glyphs for whatever you've used here. Lowering
your Unicode-osity might be a good idea.
> have forgotten. nonetheless, it seems to point the
> finger at MTU-related issue(s?).
Did you say you were using a VPN?
Ask your admin if he has set the firewall to filter out ICMP (not a
very clueful thing to do - so how come NUIM do it Gavin?). Keep the
thick copy of Stevens handy, in case he says yes.
Paul Jakma paul at clubi.iepaul at jakma.org Key ID: 64A2FF6A
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