First https connection very slow ( 40 s ), can it be improved ??

i am writing a client application connect to HTTPS server
using JDK 1.3.1 with JSSE 1.0.3.
when the first time the application calls url.openConnection()
it take over 40s to finish, it is too slow.
but after the first openConnection(), the other openConnection work respond fast.
i have use "java.net.debug=all" to check...
the first openConnection() is blocked at
"trigger seeding for SecureRandom" for 40s
how can i improve this situation ??

It takes time because the initalization has to build up enough entropy of randomness. This is not a very easy thing to do, because there is no good source of true randomness.
Doing something like new SecureRandom(new byte[] {47, 11}) will instantiate a SecureRandom of the highest-priority provider and bypass the lengthy initialization. You can not guarantee that the ssl implementation will use that provider, but I'm pretty sure the current does.
Just try it and let me know if it works. Otherwise I will have another look at it.

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Adobe Photoshop Version: 2014.2.0 20140926.r.236 2014/09/26:23:59:59 x64
Operating System: Windows 7 64-bit
Version: 6.1 Service Pack 1
System architecture: Intel CPU Family:6, Model:12, Stepping:3 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2, AVX, AVX2, HyperThreading
Physical processor count: 2
Logical processor count: 4
Processor speed: 2693 MHz
Built-in memory: 8097 MB
Free memory: 3404 MB
Memory available to Photoshop: 7084 MB
Memory used by Photoshop: 70 %
3D Multitone Printing: Disabled.
Windows 2x UI: Disabled.
Highbeam: Enabled.
Image tile size: 128K
Image cache levels: 4
Font Preview: Medium
TextComposer: Latin
Display: 1
Display Bounds: top=0, left=0, bottom=1080, right=1920
Display: 2
Display Bounds: top=180, left=1920, bottom=1080, right=3520
OpenGL Drawing: Enabled.
OpenGL Allow Old GPUs: Not Detected.
OpenGL Drawing Mode: Normal
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
AIFCoreInitialized=1
AIFOGLInitialized=1
OGLContextCreated=1
NumGLGPUs=1
NumCLGPUs=1
glgpu[0].GLVersion="3.0"
glgpu[0].GLMemoryMB=2112
glgpu[0].GLName="Intel(R) HD Graphics 4600"
glgpu[0].GLVendor="Intel"
glgpu[0].GLVendorID=32902
glgpu[0].GLDriverVersion="9.18.10.3204"
glgpu[0].GLRectTextureSize=8192
glgpu[0].GLRenderer="Intel(R) HD Graphics 4600"
glgpu[0].GLRendererID=1046
glgpu[0].HasGLNPOTSupport=1
glgpu[0].GLDriver="igdumdim64.dll,igd10iumd64.dll,igd10iumd64.dll,igdumdim32,igd10iumd32,i gd10iumd32"
glgpu[0].GLDriverDate="20130603000000.000000-000"
glgpu[0].CanCompileProgramGLSL=1
glgpu[0].GLFrameBufferOK=1
glgpu[0].glGetString[GL_SHADING_LANGUAGE_VERSION]="1.30 - Build 9.18.10.3204"
glgpu[0].glGetProgramivARB[GL_FRAGMENT_PROGRAM_ARB][GL_MAX_PROGRAM_INSTRUCTIONS_ARB]=[1447 ]
glgpu[0].glGetIntegerv[GL_MAX_TEXTURE_UNITS]=[8]
glgpu[0].glGetIntegerv[GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS]=[80]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS]=[16]
glgpu[0].glGetIntegerv[GL_MAX_TEXTURE_IMAGE_UNITS]=[16]
glgpu[0].glGetIntegerv[GL_MAX_DRAW_BUFFERS]=[8]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_UNIFORM_COMPONENTS]=[4096]
glgpu[0].glGetIntegerv[GL_MAX_FRAGMENT_UNIFORM_COMPONENTS]=[4096]
glgpu[0].glGetIntegerv[GL_MAX_VARYING_FLOATS]=[64]
glgpu[0].glGetIntegerv[GL_MAX_VERTEX_ATTRIBS]=[16]
glgpu[0].extension[AIF::OGL::GL_ARB_VERTEX_PROGRAM]=1
glgpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_PROGRAM]=1
glgpu[0].extension[AIF::OGL::GL_ARB_VERTEX_SHADER]=1
glgpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_SHADER]=1
glgpu[0].extension[AIF::OGL::GL_EXT_FRAMEBUFFER_OBJECT]=1
glgpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_RECTANGLE]=1
glgpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_FLOAT]=1
glgpu[0].extension[AIF::OGL::GL_ARB_OCCLUSION_QUERY]=1
glgpu[0].extension[AIF::OGL::GL_ARB_VERTEX_BUFFER_OBJECT]=1
glgpu[0].extension[AIF::OGL::GL_ARB_SHADER_TEXTURE_LOD]=0
clgpu[0].CLPlatformVersion="1.2 AMD-APP (1124.2)"
clgpu[0].CLDeviceVersion="1.2 AMD-APP (1124.2)"
clgpu[0].CLMemoryMB=2048
clgpu[0].CLName="Hainan"
clgpu[0].CLVendor="Advanced Micro Devices, Inc."
clgpu[0].CLVendorID=4098
clgpu[0].CLDriverVersion="1124.2 (VM)"
clgpu[0].CUDASupported=0
clgpu[0].CLBandwidth=2.56187e+010
clgpu[0].CLCompute=285.525
License Type: Subscription
Serial number: 90970762941485624948
Application folder: C:\Program Files\Adobe\Adobe Photoshop CC 2014\
Temporary file path: C:\Users\Sam\AppData\Local\Temp\
Photoshop scratch has async I/O enabled
Scratch volume(s):
Startup, 153,9G, 88,5G free
Required Plug-ins folder: C:\Program Files\Adobe\Adobe Photoshop CC 2014\Required\Plug-Ins\
Primary Plug-ins folder: C:\Program Files\Adobe\Adobe Photoshop CC 2014\Plug-ins\
Installed components:
   A3DLIBS.dll   A3DLIB Dynamic Link Library   9.2.0.112
   ACE.dll   ACE 2014/08/12-23:42:09   79.557478   79.557478
   adbeape.dll   Adobe APE 2013/02/04-09:52:32   0.1160850   0.1160850
   AdbePM.dll   PatchMatch 2014/09/07-21:07:38   79.558079   79.558079
   AdobeLinguistic.dll   Adobe Linguisitc Library   8.0.0
   AdobeOwl.dll   Adobe Owl   5.2.4
   AdobePDFL.dll   PDFL 2014/08/18-15:13:12   79.512424   79.512424
   AdobePIP.dll   Adobe Product Improvement Program   7.2.1.3399
   AdobeXMP.dll   Adobe XMP Core 2014/08/20-09:53:02   79.156797   79.156797
   AdobeXMPFiles.dll   Adobe XMP Files 2014/08/20-09:53:02   79.156797   79.156797
   AdobeXMPScript.dll   Adobe XMP Script 2014/08/20-09:53:02   79.156797   79.156797
   adobe_caps.dll   Adobe CAPS   8,0,0,13
   AGM.dll   AGM 2014/08/12-23:42:09   79.557478   79.557478
   ahclient.dll    AdobeHelp Dynamic Link Library   1,8,0,31
   amtlib.dll   AMTLib (64 Bit)   8.0.0.122212002 BuildVersion: 8.0; BuildDate: Wed Jul 30 2014 15:59:34)   1.000000
   ARE.dll   ARE 2014/08/12-23:42:09   79.557478   79.557478
   AXE8SharedExpat.dll   AXE8SharedExpat 2013/12/20-21:40:29   79.551013   79.551013
   AXEDOMCore.dll   AXEDOMCore 2013/12/20-21:40:29   79.551013   79.551013
   Bib.dll   BIB 2014/08/12-23:42:09   79.557478   79.557478
   BIBUtils.dll   BIBUtils 2014/08/12-23:42:09   79.557478   79.557478
   boost_date_time.dll   photoshopdva   8.0.0
   boost_signals.dll   photoshopdva   8.0.0
   boost_system.dll   photoshopdva   8.0.0
   boost_threads.dll   photoshopdva   8.0.0
   cg.dll   NVIDIA Cg Runtime   3.0.00007
   cgGL.dll   NVIDIA Cg Runtime   3.0.00007
   CIT.dll   Adobe CIT   2.2.6.32411   2.2.6.32411
   CITThreading.dll   Adobe CITThreading   2.2.6.32411   2.2.6.32411
   CoolType.dll   CoolType 2014/08/12-23:42:09   79.557478   79.557478
   dvaaudiodevice.dll   photoshopdva   8.0.0
   dvacore.dll   photoshopdva   8.0.0
   dvamarshal.dll   photoshopdva   8.0.0
   dvamediatypes.dll   photoshopdva   8.0.0
   dvametadata.dll   photoshopdva   8.0.0
   dvametadataapi.dll   photoshopdva   8.0.0
   dvametadataui.dll   photoshopdva   8.0.0
   dvaplayer.dll   photoshopdva   8.0.0
   dvatransport.dll   photoshopdva   8.0.0
   dvaui.dll   photoshopdva   8.0.0
   dvaunittesting.dll   photoshopdva   8.0.0
   dynamiclink.dll   photoshopdva   8.0.0
   ExtendScript.dll   ExtendScript 2014/01/21-23:58:55   79.551519   79.551519
   icucnv40.dll   International Components for Unicode 2013/02/25-15:59:15    Build gtlib_4.0.19090
   icudt40.dll   International Components for Unicode 2013/02/25-15:59:15    Build gtlib_4.0.19090
   igestep30.dll   IGES Reader   9.3.0.113
   imslib.dll   IMSLib DLL   7.0.0.154
   JP2KLib.dll   JP2KLib 2014/06/28-00:28:27   79.254012   79.254012
   libifcoremd.dll   Intel(r) Visual Fortran Compiler   10.0 (Update A)
   libiomp5md.dll   Intel(R) OpenMP* Runtime Library   5.0
   libmmd.dll   Intel(r) C Compiler, Intel(r) C++ Compiler, Intel(r) Fortran Compiler   12.0
   LogSession.dll   LogSession   7.2.1.3399
   mediacoreif.dll   photoshopdva   8.0.0
   MPS.dll   MPS 2014/08/18-23:43:19   79.557676   79.557676
   pdfsettings.dll   Adobe PDFSettings   1.04
   Photoshop.dll   Adobe Photoshop CC 2014   15.2
   Plugin.dll   Adobe Photoshop CC 2014   15.2
   PlugPlugExternalObject.dll   Adobe(R) CEP PlugPlugExternalObject Standard Dll (64 bit)   5.0.0
   PlugPlugOwl.dll   Adobe(R) CSXS PlugPlugOwl Standard Dll (64 bit)   5.2.0.46
   PSArt.dll   Adobe Photoshop CC 2014   15.2
   PSViews.dll   Adobe Photoshop CC 2014   15.2
   SCCore.dll   ScCore 2014/01/21-23:58:55   79.551519   79.551519
   ScriptUIFlex.dll   ScriptUIFlex 2014/01/20-22:42:05   79.550992   79.550992
   svml_dispmd.dll   Intel(r) C Compiler, Intel(r) C++ Compiler, Intel(r) Fortran Compiler   12.0
   tbb.dll   Intel(R) Threading Building Blocks for Windows   4, 2, 2013, 1114
   tbbmalloc.dll   Intel(R) Threading Building Blocks for Windows   4, 2, 2013, 1114
   TfFontMgr.dll   FontMgr   9.3.0.113
   TfKernel.dll   Kernel   9.3.0.113
   TFKGEOM.dll   Kernel Geom   9.3.0.113
   TFUGEOM.dll   Adobe, UGeom©   9.3.0.113
   updaternotifications.dll   Adobe Updater Notifications Library   8.0.0.14 (BuildVersion: 1.0; BuildDate: BUILDDATETIME)   8.0.0.14
   VulcanControl.dll   Vulcan Application Control Library   5.0.0.82
   VulcanMessage5.dll   Vulcan Message Library   5.0.0.82
   WRServices.dll   WRServices Fri Mar 07 2014 15:33:10   Build 0.20204   0.20204
   wu3d.dll   U3D Writer   9.3.0.113
Required plug-ins:
   3D Studio 15.2 (2014.2.0 x001)
   Accented Edges 15.2
   Adaptive Wide Angle 15.2
   Angled Strokes 15.2
   Average 15.2 (2014.2.0 x001)
   Bas Relief 15.2
   BMP 15.2
   Camera Raw 8.6
   Camera Raw Filter 8.6
   Chalk & Charcoal 15.2
   Charcoal 15.2
   Chrome 15.2
   Cineon 15.2 (2014.2.0 x001)
   Clouds 15.2 (2014.2.0 x001)
   Collada 15.2 (2014.2.0 x001)
   Color Halftone 15.2
   Colored Pencil 15.2
   CompuServe GIF 15.2
   Conté Crayon 15.2
   Craquelure 15.2
   Crop and Straighten Photos 15.2 (2014.2.0 x001)
   Crop and Straighten Photos Filter 15.2
   Crosshatch 15.2
   Crystallize 15.2
   Cutout 15.2
   Dark Strokes 15.2
   De-Interlace 15.2
   Dicom 15.2
   Difference Clouds 15.2 (2014.2.0 x001)
   Diffuse Glow 15.2
   Displace 15.2
   Dry Brush 15.2
   Eazel Acquire 15.2 (2014.2.0 x001)
   Embed Watermark 4.0
   Entropy 15.2 (2014.2.0 x001)
   Export Color Lookup Tables NO VERSION
   Extrude 15.2
   FastCore Routines 15.2 (2014.2.0 x001)
   Fibers 15.2
   Film Grain 15.2
   Filter Gallery 15.2
   Flash 3D 15.2 (2014.2.0 x001)
   Fresco 15.2
   Glass 15.2
   Glowing Edges 15.2
   Google Earth 4 15.2 (2014.2.0 x001)
   Grain 15.2
   Graphic Pen 15.2
   Halftone Pattern 15.2
   HDRMergeUI 15.2
   HSB/HSL 15.2
   IFF Format 15.2
   IGES 15.2 (2014.2.0 x001)
   Ink Outlines 15.2
   JPEG 2000 15.2
   Kurtosis 15.2 (2014.2.0 x001)
   Lens Blur 15.2
   Lens Correction 15.2
   Lens Flare 15.2
   Liquify 15.2
   Matlab Operation 15.2 (2014.2.0 x001)
   Maximum 15.2 (2014.2.0 x001)
   Mean 15.2 (2014.2.0 x001)
   Measurement Core 15.2 (2014.2.0 x001)
   Median 15.2 (2014.2.0 x001)
   Mezzotint 15.2
   Minimum 15.2 (2014.2.0 x001)
   MMXCore Routines 15.2 (2014.2.0 x001)
   Mosaic Tiles 15.2
   Multiprocessor Support 15.2 (2014.2.0 x001)
   Neon Glow 15.2
   Note Paper 15.2
   NTSC Colors 15.2 (2014.2.0 x001)
   Ocean Ripple 15.2
   OpenEXR 15.2
   Paint Daubs 15.2
   Palette Knife 15.2
   Patchwork 15.2
   Paths to Illustrator 15.2
   PCX 15.2 (2014.2.0 x001)
   Photocopy 15.2
   Photoshop 3D Engine 15.2 (2014.2.0 x001)
   Photoshop Touch 14.0
   Picture Package Filter 15.2 (2014.2.0 x001)
   Pinch 15.2
   Pixar 15.2 (2014.2.0 x001)
   Plaster 15.2
   Plastic Wrap 15.2
   PLY 15.2 (2014.2.0 x001)
   PNG 15.2
   Pointillize 15.2
   Polar Coordinates 15.2
   Portable Bit Map 15.2 (2014.2.0 x001)
   Poster Edges 15.2
   PRC 15.2 (2014.2.0 x001)
   Radial Blur 15.2
   Radiance 15.2 (2014.2.0 x001)
   Range 15.2 (2014.2.0 x001)
   Read Watermark 4.0
   Render Color Lookup Grid NO VERSION
   Reticulation 15.2
   Ripple 15.2
   Rough Pastels 15.2
   Save for Web 15.2
   ScriptingSupport 15.2
   Shake Reduction 15.2
   Shear 15.2
   Skewness 15.2 (2014.2.0 x001)
   Smart Blur 15.2
   Smudge Stick 15.2
   Solarize 15.2 (2014.2.0 x001)
   Spatter 15.2
   Spherize 15.2
   Sponge 15.2
   Sprayed Strokes 15.2
   Stained Glass 15.2
   Stamp 15.2
   Standard Deviation 15.2 (2014.2.0 x001)
   STL 15.2 (2014.2.0 x001)
   Sumi-e 15.2
   Summation 15.2 (2014.2.0 x001)
   Targa 15.2
   Texturizer 15.2
   Tiles 15.2
   Torn Edges 15.2
   Twirl 15.2
   U3D 15.2 (2014.2.0 x001)
   Underpainting 15.2
   Vanishing Point 15.2
   Variance 15.2 (2014.2.0 x001)
   Virtual Reality Modeling Language | VRML 15.2 (2014.2.0 x001)
   Water Paper 15.2
   Watercolor 15.2
   Wave 15.2
   Wavefront|OBJ 15.2 (2014.2.0 x001)
   WIA Support 15.2 (2014.2.0 x001)
   Wind 15.2
   Wireless Bitmap 15.2 (2014.2.0 x001)
   ZigZag 15.2
Optional and third party plug-ins: NONE
Plug-ins that failed to load: NONE
Flash: NONE
Installed TWAIN devices: NONE

Network connection very slow, lot of drops

Hello!
On my network, there's an ADSL modem; an AirPort Extreme is connected to it and all my computers are connected to that AirPort Extreme.
Initially, I had set the AirPort Extreme as a bridge and the modem was in PPPoE. However, I had weird troubles with that setup (one computer couldn't reach another one, not even ping) so I made the other way around: the modem is now in bridge mode and the AirPort Extreme handles the PPPoE connection.
Since then (at least, I guess), downloading from the Internet or simply browsing is a nightmare. Connections would start at a varying low rate (always less than 30 KB/s, sometimes 5 KB/s) and always slow down until the connection drops completely. For small files, I can hope to download a 1 MB file in 40 minutes; for larger ones, it's hopeless.
I've tried to rule out the AirPort Extreme, connecting one computer directly to the modem. I reset the modem (since it's in bridge mode and it's beyond the subnet made from the AirPort Extreme, how can I reach it from my network?) and enter my ISP data. When all the lights on the modem are fine, it tells me some tests failed; I can't connect to the Internet that way. It looks like the modem lost its ability to connect as PPPoE when I defined it as a bridge (?).
I then tried to rule out the modem. I connected my computer and the ADSL line to the AirPort Extreme (which still had the PPPoE settings); the AirPort Extreme would not connect or reach a DNS (what's the purpose of having PPPoE settings if it can't connect to the Internet without even passing by a modem in bridge mode?).
In short, I can't rule out either the modem nor the AirPort Extreme, because they both can't connect to the Internet separately (the modem could before I inverted which device is in bridge mode). After all my attempts, the only way to get Internet back is to set the modem again as a bridge and use the AirPort Extreme for the PPPoE, which makes the whole problem of a very slow connection (even unusable) that I'm trying to repair. I'm lost at that point.
Any help would be really welcome!

Bob Timmons wrote:
Two possibilities:
1) The modem is not working correctly and should be replaced
If that's the case, then I'm feeling guilty, as it worked before I set it as a bridge.
2) Your log in information has changed due to service provider updates. Contact your provider to verify your account details
It's actually my mother who created that account; I'll ask her further.
my native language isn't English
But, your English is excellent.
Thank you.
Some countries use PPPoA authentication, and not PPPoE. Although they are similar, if your provider really uses PPPoA credentials, then you cannot log on from your Mac or use the AirPort router to provide the log on authorization, since Apple does not support PPPoA.
Well, I tried using PPPoA recently and it wasn't better. Also, the fact that the AirPort is currently the one making the PPPoE authentication seems to definitively indicate it's not PPPoA (thanks to your information that it wouldn't work in that case).
Generally, my opinion would be that things will work better if you use the modem or a modem/router to provide the connection service and run the AirPort in Bridge Mode.....rather than trying to put the modem in Bridge Mode and use the AirPort to provide the connection service.
Yes, I agree. Actually, I had another problem with the previous setup (AirPort as bridge and modem for PPPoE) where, on my LAN with two computers, only one could reach the other one (the connection worked in one direction only); I couldn't even use file sharing, Remote Desktop or even ping (because, even trying from the working sense, the response would often not come back). In this Apple forum, I got the suggestion to exchange which device was in bridge mode and, indeed, now I can communicate from and to all computers. Since I've realised my connection to the Internet is now mostly broken, I should have been satisfied with the previous problem…
I'm hoping to go back to an Internet connection that works, and not get the first issue of computers not being reachable on the LAN. The big trouble here is that all these behaviours I've experienced are weird (am I outside of the logic with my use of the devices?). I'm also noticing that the first problem sounds to have arrived since I replaced my old router by the AirPort Extreme.
If your modem is 4-5 years old, then that might be another reason to consider replacing it. Ask your provider what they would recommend.
Wow, mine is actually way older than that! I don't think we've ever changed it since we had an Internet connection (around 1998). At this time, things were not designed to break too soon, right?
Perhaps it had to break with this duration of use, and it just waited that I change settings to break… Doesn't sound a likely scenario, however.
I'm considering trying with my neighbour's modem (with his connection's settings), with the AirPort in bridge mode. If it works, I'll be almost certain the problem is the modem, I'm right?
Thank you very much for your help so far; things are getting clearer!

Wireless N connection very slow

I was running my wireless router at home (internet through Comcast) in mixed mode (b/g/n), and noticed that my S3's download speed when on the wireless seemed very slow. I confirmed this using speedtest.net (the android app) and saw a very big difference between the S3 on the wireless router and my laptop. I tested my wife's laptop and S3 as well, with the same results. (The laptops consistently got 20Mbps down while the S3s both got around 1.8Mpbs down.) The 4g LTE speeds were incredible, but since I'm on a data cap now, I can't use that for the majority of what I want to do with the phone.
After some testing, I found that if I disabled N altogether on my router, our S3s connect and get the same speeds as our laptops. Now my router runs only in 2.4Ghz band, and I have not had a chance to test my N connection on a 5Ghz band. For whatever reason, the Verizon version of the S3 does not have a setting where you can tell the phone what band to connect to, but from what I've read it only connects at 2.4. I'm going to try some more testing to see if this is in fact the case or not.
Anywho, I'm now getting good download speeds connecting in mode G, but I'm kind of bummed that Verizon has (surprise surprise) limited the phone in this way. AT&T and Sprint customers I've talked to are able to connect to Wireless N, and though some of them have problems if the band is set in auto mode, if they specifically choose the band their router is running in, it works just fine. Don't get me wrong, I choose to be with Verizon and generally am happy with the service (losing unlimited data notwithstanding), but I just don't understand why they took away the ability to control the wireless connection in this way. Its doesn't make sense.

First of all, the speeds you are quoting all sound like Mbps (megabits per second) connection speeds, not data throughput speeds. You really need to measure your actual download speed to tell what is actually going on with your system.
Use speedtest.net and test your system. Turn off all other computers except the test computer. Test under the following conditions:
1) connect one computer, by wire, directly to your modem
2) connect the same computer, by wire, directly to your router
3) connect the same computer wireless to your router
4) connect your other computers, wirelessly to the router, one at a time
Also, state the speed that you are paying your ISP for.
Report your download and upload speeds for all of the above tests.
Note that the speed that you are paying for should be about the same as your results from test 1 and 2 above.
After you have done these tests, it will be much easier to tell where the problem is.

TimeCapsule 2.4ghz connection VERY slow

For the past several days, any connection to the 2.4Ghz radio on my TC is very slow. Speedtest.net shows .29Mbps download and .34Mbps upload (yes, note the decimal place!). If I switch over to the 5Ghz radio, my speeds increase to 16.03Mbps download and 4.19Mbps upload. Also, when connected to the 5Ghz radio, my laptop is showing a full 4 bars of strength, whereas when connect to 2.4 radio, I am only getting 1-2 bars from the same location.
The TC is connected to my Comcast cable modem - wired connections through the TC are getting 30+Mbps downloads.
I have tried restarting TC, restarting the cable modem, rebooting client machines...
Ideas? is my 2.4Ghz radio dying?

Chances are, your router is just fine and you are picking up some interference on the overcrowded 2.4 GHz band from a cordless phone, other neraby wireless network, or a wireless camera/security system.
I used to have intermittent slow downs and drop outs on my old 2.4 GHz router and never could figure out why. One day at my desk, by accident I noticed my neighbor coming out of his front door talking on his cordless phone wihen my wireless suddenly slowed. When he got to his mailbox on the street, the wireless was down to a crawl.
So, the source of the interference may not necessarily be in your home, although if you have any cordless phones, that would be the first thing to investigate. For more info on the epidemic problem of wireless interference, you might want to look over this document:
http://support.apple.com/kb/HT1365
Or, this thread:
https://discussions.apple.com/thread/2262411?threadID=2262411&tstart=0

E book bought from Waterstones is very slow in use can you, help?

E book bought from Waterstones is unreasonably slow in use can you help, please?
I purchased a copy of “The Complete English Poems” by John Donne as an e-book, I downloaded the e-book successfully, as well as the new Digital Editions software and transferred the e-book to my Sony Reader. However when I try to use the book it is slow opening up and very slow moving between sections, or navigating between the poem and the notes on the poems, typically between three and five minutes. In practice this means that if I wish to consult a note on a poem it can take five minutes to move from the poem to the note then another five minutes to navigate back, giving a time of ten minutes to consult a note. This is not really feasible.
I have had no problem downloading and reading other books, from Waterstones bought after the John Donne.
I have tried deleting and re-loading the John Donne, as well as resetting the reader to no avail.
I contacted Sony support who says that as my other e-books from Waterstones and other sources work perfectly, then the fault lies with “The Complete English Poems” and not the Sony reader.
Please note that I had a similar problem with a Waterstones edition of “the King James Version of The Holy Bible. “ This problem was never resolved.

You need to install more RAM.
Your year and model IMac can take a total of 6 GBs of RAM.
Correct, compatible and reliable Mac RAM can ONLY be purchased from online RAM sources Crucial memory or OWC (macsales.com).
The 6 GB RAM kit can be found here.
http://eshop.macsales.com/shop/memory/iMac/Intel_Core_2_Duo_PC2-6400
If you haven't use this application often, completely uninstall CleanMyMac.
Total, useless "junkware"/"Garbageware"/malware.
http://macpaw.com/support/cleanmymac-classic/knowledgebase/how-to-uninstall-clea nmymac-classic
http://macpaw.com/support/cleanmymac/knowledgebase/how-to-uninstall-cleanmymac-2
Ditch ALL Googlewares. They are ALL a serious resource hog on the OS X system.
https://support.google.com/chrome/answer/95319?hl=en
https://support.google.com/drive/answer/2375081?hl=en
If you do not like Apple's Safari web browser, download, install and try Mozilla FireFox, instead.
The current, up-to-date version of FireFox is fully compatible with OS X and is regularly updated by the great developers of the Mozilla group.
I have, also, stopped using the Google search engine, regularly and use DuckDuckGo as my default search engine.
You have too many and duplicate user login/startup items.
Add or remove automatic items
Choose Apple menu > System Preferences, then click Users & Groups.
Select your user account, then click Login Items.
Do one of the following:
Click Add below the list on the right, select an app, document, folder, or disk, then click Add.
If you don’t want an item’s windows to be visible after login, select Hide. (Hide does not apply to servers, which always appear in the Finder after login.)
Select the name of the item you want to prevent from opening automatically, then click Delete below the list on the right.

IOS7 on iPhone 4s: Since I have iOS7, my 4s connects very slow (or not at all) to a known Wi-Fi access point (e.g. at home). This this a bug?

Since I have installed iOS7 on my iPhone 4s - 16G, my 4s connects very slowly to my home Wi-Fi network. Sometimes it even doesn't connects at all. Which result in a higher mobile data usage (and thus higher bill at the end of the month).
Can this error be solved in iOS 7.0.4?

Hi masterwil,
The article below may be able to help you troubleshoot your Wi-Fi issue.
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/TS1398?viewlocale=en_US
Reset network settings by tapping Settings > General > Reset > Reset Network Settings.
Note: This will reset all network settings including previously connected Wi-Fi networks and passwords
iOS and OS X: Recommended settings for Wi-Fi routers and access points
http://support.apple.com/kb/HT4199
I hope this information helps ....
Have a great day!
- Judy

First https connection very slow ( 40 s ), can it be improved ??

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