[THIN] Re: attn: slightly OT: Long Fat Network Syndrome
- From: "Timothy Mangan" <tmangan@xxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 13 May 2004 10:04:29 -0400
I'm not sure what those devices will do. The act of replacing the address
and recalculating checksum itself would not require ACK/windowing on the NAT
device itself. However, I certainly have developed quite a few
"intermediary" boxes over the years that would perform ACK spoofing to
improve performance (i.e. The NAT might to ACK/windowing on behalf of the
lan side, allowing the wan client to send more sooner). If that is the
case, it would need to support the RFC also if you want to take advantage.
If you ask the vendor, it shouldn't take them more than a couple of months
for them to tell you how it works!
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Lilley, Brian
Sent: Thursday, May 13, 2004 9:17 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: attn: slightly OT: Long Fat Network Syndrome
hmmmmm, will do. I would hope that the NAT/firewall is simply repacking the
TCP segment into IP packets and would care what was inside... mind you,
having said that, if you are firewalling on TCP sockets etc, then I guess it
does need to open up and rebuild the segment??!! good thinking Tim..
Brian
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Timothy Mangan
Sent: 13 May 2004 13:20
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: attn: slightly OT: Long Fat Network Syndrome
In theory it should help a little -- but I've never tried it. Before
embarking, find out if your NAT/Firewall needs to support it also to take
advantage. And let us know what you find out!
tim
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Lilley, Brian
Sent: Thursday, May 13, 2004 7:18 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] attn: slightly OT: Long Fat Network Syndrome
I am trying to resolve the age old problem of Terminal services users
accessing their home drives/profiles over high latency connections.
My client has multiple 40mbps connections and still suffers slow connection
problems..classic Long Fat Networks syndrome!
I am looking to implement RFC1323 (TCP extensions for High Performance),
which basically allows the TCP stack to negotiate a much larger receive
window size and thus radically improve their WAN TCP connections?
Have any of you networky spods out there have any experience with setting
the TCPOpt settings for RFC1323 in a terminal serivces environment?
Thanks in advance,
Brian
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