TCP Optimizer - Tips For BEGINNERS

[Rollingstone]

TCP Optimizer - Tips For BEGINNERS:


General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU ?
TTL - 64
TCP Receive Window - ?
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - ?
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 10
LocalPriority - ?
Host Priority - ?
DNSPriority - ?
NetbtPriority - ?
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

How to get MTU ?
Just use TCP/IP Analyzer http://www.speedguide.net:8080

How to get proper RWIN ? (TCP Receive Window)

RWIN DEPENDS ON FOLLOWING FACTORS

+ Bandwidth
+ Which country we are in
+ Which country we surf frequently

Formula

RWIN = BANDWIDTH (DOWNLOAD) * MAX.LATENCY /8

MAX.LATENCY : we should only assume worst latency to the country we surf to most often and stick with it.

+ We should make RWIN an EVEN multiple of MSS

+ Satellite or Wireless should use larger RWIN values because of the high latency

AFTER ALL THOSE CALCULATIONS, HERE IS A VERY ROUGH BREAKDOWN OF THE ****YZER RECOMMENDED VALUES...

If MTU = 1500

513920 -- works for ~8 to ~30 Mbps
256960 -- 2 to 14 Mbps
128480 -- 1 to 5 Mbps
64240 -- works well up to ~2 Mbps.

If MTU = 1492

511104 -- works for ~8 to ~30 Mbps
255552 -- 2 to 14 Mbps
127776 -- 1 to 5 Mbps
63888 -- works well up to ~2 Mbps.

If MTU < 1472

+ Log into your modem/router and set MTU according to your connection type.
+ LEAVE RWIN BLANK and Uncheck Window Scaling
+ Use WinSockFix
+ Update your modem's firmware to get higher MTU
+ Uninstall tweak programs like cfos Speed


If TCPOptimizer can not adjust your RWIN , try enter the value for DefaultReceiveWindow in Cablenut

Windows Scaling
Check Windows Scaling when RWIN > 65535

Constant Values:
Custom settings - check
Modify All Network Adapters - check
TTL - 64
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
Timestamps - uncheck
MaxConnectionsPerServer - 10
MaxConnectionsPer1_0Server - 10
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8

REMEMBER

+ Fix EMI (ElectroMagnetic Interference) elements :
Relocate them to some place that are a few feet away from ALL other electrical devices, including apart from each other.Also, make sure you do not coil up any excess length of signal or power cables.

+ Scan for Spyware/malware:

We recommend

Ad-Aware
Spybot Search & Destroy

+ Disable unnecessary items :

Start > Run > type "msconfig" > StartUp tab > Uncheck unnecessary items

Start > Control Panel > Network Connection > Choose your Network > Uncheck "Client for Microsoft Networks”, “File and Printer sharing for Microsoft Network” , and “QoS Packet scheduler”.

Right click on My Computer > Properties > Advanced tab > Perfomance : Settings > Visual Effects tab > Check "Adjust for best performance" (check "Visual Styles on windows and buttons" and "Use drop shadows for icon labels on the desktop" if you want to keep WinXP theme).

+ Disable unnecessary services :

Run > Type "services.msc" > Disable "Application Layer Gateway Service", "Automatic Updates & Background Intelligent Transfer Service", "QoS RSVP" > Restart Win !!!

+ Using OpenDNS :

Start > Control Panel > Network Connection > Choose your Network > Properties > Internet Protocol (TCP/IP) > Properties > Use the following DNS server addresses => 208 67 222 222, 208 67 220 220.

More Useful Links :

RWIN in Vista

Wireless Tips

Dr Tweak

Speedtest

HijackThis

IP Lookup

SNR & Line Attenuation

Vietnam ADSL Zone

[Kamikize]

What would you say , Trogers ?

[trogers]

Originally Posted by Kamikize

What would you say , Trogers ?

TCP Window size depends on bandwidth and max. latency and different countries or different continents will have different rules of thumb.

Default ToS value can be different. Suggested values that conform to both ToS and Diffserv standards are 80, 104 and 136 - http://www.speedguide.net/tcpoptimizer.php#advanced_qos

Some ISPs may not accept any value set to it other then zero.

[Rollingstone]

Originally Posted by trogers

TCP Window size depends on bandwidth and max. latency and different countries or different continents will have different rules of thumb.

Some ISPs may not accept any value set to it other then zero.

Could You tell more , Trogers ?

[trogers]

Originally Posted by Rollingstone

Could You tell more , Trogers ?

The differences are due to differing max. latency - the time for a full sized packet to make the round trip. Thus it depends on where you are and which country you surf to most often.

If we use the US as the most surfed to place, then latency for users in East and South East Asia will be 450-550ms depending on time of day.

A user in the US will only face latency of 90-130ms. Thus TCP Window Size will be different for the same bandwidth.

[Rollingstone]

Originally Posted by trogers

latency for users in East and South East Asia will be 450-550ms depending on time of day.

A user in the US will only face latency of 90-130ms. Thus TCP Window Size will be different for the same bandwidth.

How about latency for users in West ?

How to deal with the DISTANCE PROPBLEM ?

Sometimes , the TCP Window is left BLANK , Could you explain?

[trogers]

Originally Posted by Rollingstone

How about latency for users in West ?

How to deal with the DISTANCE PROPBLEM ?

Sometimes , the TCP Window is left BLANK , Could you explain?

All users face the same problem - a user in the US who frequents sites in Asia, or one in Australia to the UK, etc. Once you consider surfing to a different continent, latency will shoot up due not only to distance but also congestion along the international cable link.

There is nothing you can do at your end about latency along international links but to use a TCP Window sized appropriately.

TCP Window is left blank only in settings to try increasing MTU when TCP Analyzer reported some value that is not 1500, 1492 or 1480. When it is left blank with Window scaling unchecked, TCP Window will revert to default value 65535. If scaling is checked, the value will go above 10 million.

[jasonb31]

Trodgers have you tried the Opera browser? What do you think about it? As far as I have seen there is no need to tweak it as you have said that Fire Fox does need some.

[jasonb31]

Why cant my Dell with XP find “gpedit.msc” ? or gpedit.msc? Any Ideas?

[trogers]

Originally Posted by jasonb31

Trodgers have you tried the Opera browser? What do you think about it? As far as I have seen there is no need to tweak it as you have said that Fire Fox does need some.

I use Opera when I do not need to see graphics. It has an easy switch mode.

Did you log into XP with Admin right's to run gpedit.msc?

[jasonb31]

Yes I am in the administor account. You dont like the Opera graphics? Is that what you are saying?

[trogers]

Originally Posted by jasonb31

Yes I am in the administor account. You dont like the Opera graphics? Is that what you are saying?

Opera has no option to adjust graphic sizes unlike FireFox with add-on to zoom, fit to screen or reduce. I turn off graphic to enjoy page loading speed when surfing to reports and news sites.

[jasonb31]

I see!! Have any Ideas on the gpedit.msc thing? Maybe a Microsoft update killed that option? Just an Idea.

[jasonb31]

From what I have out so far is that you need to have XP Pro to do that. I have XP Home.

[Rollingstone]

I am using WinXP Pro and the Group Policy (gpedit.msc) has worked properly.

You can try "Regedit"

[trogers]

Originally Posted by Rollingstone

I am using WinXP Pro and the Group Policy (gpedit.msc) has worked properly.

You can try "Regedit"

I believe gpedit.msc is only available in Windows Server 2003, Windows 2000, or Windows XP Professional and not XP Home.

[jasonb31]

Regedit pulls up all kinds of things. I dont have a clue what to do after pulling that up, Even if something can be done there.

[trogers]

Originally Posted by jasonb31

Regedit pulls up all kinds of things. I dont have a clue what to do after pulling that up, Even if something can be done there.

You cannot set QoS to zero with regedit.

[karak]

Im new here so hello to all. What i used was FRESH UI, windows xp home does not allow for this function, so FRESH UI came in very handy.

[jasonb31]

And did what with it?