htaccess: my site works fine via mobile internet, but there is a problem in WiFi internet

I have a site on WordPress like Now I have confirmed it. My site is a problem only in the WiFi network throughout Bangladesh alone. But everything is fine through any mobile network.

If I want to browse my site through WiFi internet. Then the site takes a long time to load. Even the following message arrives many times. At this time I cannot navigate my site.

This site can’t be reached took too long to respond.
• Checking the connection
• Checking the proxy and the firewall 
• Running Windows Network Diagnostics

In this case, my site can be opened by giving an update 3/5 times.

But if you use mobile data. The site opens quickly.

First, I am using the "All In One WP Security" plug-in. But if you disable the entire add-on, that is not the solution.

I tried to follow the following link. But there was no solution
[The WP site cannot be accessed through the WiFi network

Please, someone kindly give me a solution.

Please please please…

Will a Nikon D810 give me more fine details than a D610 for enlarged macro shots?

What kind of lighting are you using? I think that is where there is great potential for improvement. With textured subjects, the angle (s) of your light source (s) with respect to the optical axis of the camera can make a significant difference in the contrast and the amount of detail you can see.

The fact that their subjects are usually inside aquariums presents additional challenges, but they are not insurmountable. Much of what is discussed about lighting in this question about fish photography in an aquarium would also apply to your situation.

Its 12 MP APS-C D90 has the same pixel density as a 27 MP FF sensor, so it would actually be losing some ground with the D610 at 24 MP, but the 6% linear difference would be negligible. I would simply get more in the frame with the same lens. The D810, on the other hand, has a 36.3 MP sensor. In terms of linear resolution, that is a 23% increase over 90D that could be significant if your lens is up to the challenge.

Which brings us to the choice of the lens, which is where all macro photography should begin.

We should probably pause here to define some terms:

  • MFD: The minimum focus distance is measured from the subject to the image plane. That is, the focusing distance is measured from the film or the digital sensor to the subject.
  • WD: the working distance is measured from the front of the lens to the subject. The working distance can be defined as the minimum focusing distance minus the distance from the image plane to the front of the lens when the lens is fully extended in MFD. If a lens has an 8 "MFD and is 5" from the sensor to the front of the lens when the lens is focused on MFD, the WD would be the remaining 3 ".
  • MM: the maximum magnification is the largest that the lens can project a focused image of the subject on the film or the sensor. If a lens has a 1.0X MM, you can project an image of the subject of the same size on the sensor as the subject in real life. If a lens has a 0.5X MM, you can project a medium-sized image of the subject on the sensor. This increase is measured on the sensor.
  • RR: the reproduction ratio is another way of expressing the maximum magnification amount of a lens. It is the ratio of the size of the projected image compared to the size of the subject. 1: 1 is the same as 1.0X MM. 1: 2 is the same as a 0.5X MM, 5: 1 is the same as a 5.0X MM (very specialized lenses), and so on.
  • Magnification ratio: when we see images of most of our cameras, we enlarge the resulting image far beyond the size of the sensor or film. If we have a full-frame camera (sensor or 36×24 mm film) and a lens with a 1.0X MM, when we see the image even at 4×6 inches, we have used a magnification ratio of approximately 4.25X (linear), then the subject will appear 4.25X wider and taller in a 4×6 inch print than its actual size. It seems that 8.5X is the actual size for an 8×12 inch print, and so on.

Most macro lenses are only capable of reproducing 1: 1 at their minimum focusing distance. If you have to shoot from further away, you lose part of that increase. The further back you have to shoot, the smaller the subject in the frame will be.

  • If you are using the AF Micro-Nikkor 60mm f / 2.8D lens, it has an 8.7 "MFD and a 3.56-inch working distance.
  • If you are using the AF-S Micro-Nikkor 60mm f / 2.8G ED, Nikon lists the MFD at 7.2 "which leaves a working distance of only 2 inches when the lens is extended to MFD.

The density of the glass through which you are firing will affect this in some way, and the density of the water on the other side of the glass will affect it even more. Refraction due to the air / glass / water interface will increase the magnification, which will also slightly reduce the MFD.

In order to use the maximum magnification with subjects that are more than 2-3 inches from the side of the aquarium, you will need a macro lens with a greater focal length than your current 60mm lens.

The following working distances are for each lens with a maximum magnification of 1.0X (1: 1):

Tamron 90mm Macro (there have been several well-considered versions, I am using the specifications of the Model F017) has a working distance of approximately 5.1 "
Nikon AF-S 105mm f / 2.8G Micro has a WD of approximately 5.3 "
Sigma 150 mm f / 2.8 EX DG APO HSM Macro has a WD of approximately 7.3 "
Sigma 180mm f / 2.8 EX DG OS HSM Macro has a WD of approximately 10 "

Other macro lenses in each of the focal length ranges are similar. The longer the focal length, the greater the MFD at 1: 1 and, assuming that the lens lengths are relatively proportional to their focal length, the greater the working distance.

There are many other questions / answers here regarding the technique of doing macro work, but we will mention a couple of things that many new people in macro work can easily overlook:

  • For maximum magnification, the lens must be set at the minimum focusing distance. Usually, one manually sets the focus of the lens to MFD and then moves the camera forward or backward until the subject is focused.
  • For maximum detail, a sturdy tripod or other solid camera mount is required. When using the MFD technique mentioned above, a macro rail between the tripod and the camera can be invaluable. Macro rails can vary in price from around $ 20-30 to several hundred dollars, but you can find very good ones for less than $ 100.

¹ There are some macro lenses that have higher reproduction ratios than 1: 1. With such lenses, the highest reproduction ratio is always in MFD, and 1: 1 would be at a focus distance greater than MFD.

9.0 foot – Android 9: SD card is fine in settings but file managers don't see it

Lenovo Tab V7, Android 9

Configuration / Storage shows the free space of "SanDisk SD Card", when eject says "the crard is formatted for this device", Mount works.

But file managers (for example, Google File) do not display the SD card, only internal storage.

PD In Settings / Applications / Permissions / Storage, all file management applications have permission

domain name system – Postfix – MX: Host error not found but dig and nslookup are fine

I had a job Postfix email server in Centos 7 when I decided to reconfigure my host network (IP addressing, DNS, etc.), after reconfiguration, sending mail no longer works.


Dec  7 10:20:03 cedrick postfix/error(1711): 030763B26: to=, relay=none, delay=0.09, delays=0.08/0/0/0, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for type=MX: Host not found, try again)

I am pretty sure that the MX searches of the Postfix user work:

(lester@server ~)$ sudo -u postfix -H cat /etc/resolv.conf
(lester@server ~)$
(lester@server ~)$ sudo -u postfix -H dig MX

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-9.P2.el7 <<>> MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56702
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

; EDNS: version: 0, flags:; udp: 512
;         IN  MX

;; ANSWER SECTION:      3158    IN  MX  30      3158    IN  MX  40      3158    IN  MX  20      3158    IN  MX  5      3158    IN  MX  10

;; Query time: 11 msec
;; WHEN: Sat Dec 07 10:27:03 EST 2019
;; MSG SIZE  rcvd: 161

(lester@server ~)$

I feel like I'm missing something very obvious here. I've been looking for hours, but all the references I find suggest that Postfix can't perform MX searches.

Any suggestions?

fractal analysis: fine details of the Mandelbrot set

I have a question regarding some of the finer details in the Mandelbrot set. I've been watching some of the videos with very deep zoom on YouTube of the Mandelbrot Set. They are fascinating, and one of the best things is how many of the deep "wells" will end up in a small copy of the mandelbrot set, in the center, often surrounded by concentric circles. I have noticed that as one approaches the end of these zooms, the concentric circles seem to become more tense and dense, until one reaches the copy of the Mandelbrot set at the end, surrounded by extremely tight concentric rings that are so tight as to be indistinguishable. They seem almost infinitely packed. My question is, are there examples of videos of people who approach this finer detail? I'm curious to know if there is any structure at those extreme levels of packaging in detail. Thank you.

Windows + Shift + right does not move the window to the right screen (the left shift works fine)

When i use Windows Key + Shift + left the active window jumps to the monitor on the left as expected 🙂
But when I try to do it the other way around: Windows Key + Shift + right the window does not come back to the right 🙁 Nothing happens. Why? How can I solve this?

PD: I am using Windows 10 Version 1903 (64 bit) on my ThinkPad with two additional external monitors.
Windows Key + right Move the window correctly to the right (step by step but not directly to the next monitor).
Maybe the Windows Key + Shift + right Was it overwritten by something else? How can I find out?

domain name system: the link zone file is not updated while the registry is fine when doing an nslookup

I have set up a zone as a master with allowing updates from a Windows DHCP server (authorized only in IP)
When I launch / renew on a Windows workstation, I can see the PTR record updated / created successfully in the link in the area.

If I do a:


I can see the PTR updated / created successfully.

however, when looking at the zone file (for example,, the zone file is not updated immediately (if I open it, I still cannot see the record)

Does the "data file" take some time to update? (How can I see the record created successfully when doing a search) How is that possible?

Or does it mean that something is wrong somewhere in my configuration and the search comes from somewhere else (for example, a delay, etc.)

Thank you

Apache – OCSP multiple stapling: how to enable it? Simple stapling is fine.

I would like to configure OCSP multiple stapling and I cannot find much documentation about it, or in any case, recent information.

I have a root certification authority (CA) and a daughter CA below. Both work with Freeipa (and Freeipa uses Dogtag).
I also have an https server.

  1. The root CA issues a certificate for the daughter CA.
  2. The daughter CA issues a certificate for the https server.
  3. The https server offers the service for an external client.

Simple stapling OCSP works: the client can verify the https server certificate. Now, I would like to check the non-revocation of the CA daughter stapling as well.

My https server is Apache. In it, I have added the lines that follow in /etc/httpd/conf.d/ssl.conf :

SSLUseStapling on  
SSLStaplingCache shmcb:/run/httpd/sslcache(512000)

And always in ssl.conf on the https server, I used the SSLCertificateChainFile with a PEM file containing the daughter CA certificate and the https server certificate.

I guess it is not enough to add the root CA certificate in the PEM file.
And the https server must present a certificate with the URLs of both CAs written in the field Access to authority information. You need some configuration.

What should I add to simple stapling?
And how to verify that it works?
Does Freeipa / Dogtag support OCSP multiple stapling?

Subsidiary question: do browsers support multiple stapling?
I suppose so, because it is common to have a hierarchy of AC in the Internet world, but I would like to have more details and I understood that it is little used.

Thank you!

Oof! 60 million fine to AT&T

Oof! What a considerable fine for AT&T for strangling unlimited plans once users reached a certain amount of data usage. Did you have AT&T during this period of time? Did you experience any acceleration?