WiFi configuration and security settings of ZTE-ZXDSL-531 ADSL Modem


ZTE ZXDSL 531 is  a WiFi modem supplied by BSNL with their broadband connection. This guide help you to enable and configure the WiFi security settings of ZTE ZXDSL 531 Modem. With this guide, you can configure any type of WiFi modems irrespective of  brand.

1              Connect your PC/laptop with the router using Ethernet cable and in your browser type

2              A popup window will be displayed to enter user name and password – Type “admin” in both the field (Assuming that you have not changed the default password. If changed enter the same accordingly).

zte wifi1 WiFi configuration and security settings of ZTE ZXDSL 531 ADSL Modem

3.            Click on the wireless menu – In Wireless you can see Basic, Security, Mac Filter, Wireless Bridge, Advanced and Station info Sub menus. Now you are in “Basic“menu. This page allows you to configure basic features of the wireless LAN interface. You can enable or disable the wireless LAN interface, hide the network from active scans, set the wireless network name (also known as SSID) and restrict the channel set based on country requirements.

Click “Enable Wireless” check box and in the SSID field enter the name of Wireless network. Select the country of operation. You can enter the number of clients can access this network simultaneously. For Eg: If you put it “2” then maximum two computers can access this network at a time.  Click  ” Save /Apply” to configure the basic wireless options.

Security Settings

4.             Click on the Security menu -This page allows you to configure security features of the wireless LAN interface. You can set the network authentication method, selecting data encryption, specify whether a network key is required to authenticate to this wireless network and specify the encryption strength.

encrip WiFi configuration and security settings of ZTE ZXDSL 531 ADSL Modem

There are different WiFi security encryption standards. As per your operating system and the compatibility of WiFI adapters you can configure the settings accordingly. Details of the WiFi standards and their application will be explained in a separate post. Now we can select the most secured format.

  • Select the SSID (Which has been set in the previous step)
  • Select  WPA2-PSK from the network Authentication drop down menu
  • Enter a non guessable key (No dictionary words) mixed with figures and characters in  WPA Pre Shared Key field.
  • In WPA group interval field, you can enter 3600 (This is the interval between the keys are refreshed means of you set 100 your keys will be refreshed every 100 seconds)
  • Set the WPA encryption to AES
  • Click “Save Apply

MAC Filtering

Mac filtering will give you additional foolproof WiFi security. MAC (Media Access Control) address is a unique number of each network hardware. This is the identity of a machine . There will not be two network cards (Any type) with a same MAC address. This is the manufacture set hard coded one.

Through the MAC filtering you can optionally allow or deny a particular WiFi device on your network. You have to enter the MAC address of the client machines in the Modem to allow or deny a particular machine. For example – You have four laptops in a network and you want to enable MAC filtering. For this the MAC address of each machines to be entered in the Modem for connectivity, means you have to save the addresses of all four machines in your Modem.

How to find MAC address

  • For Windows PC go to start > Run ant type cmd
  • Then type ipconfig/all and you will get some values as displayed.
  • Note down the physical address of WiFi adaptor – This is your MAC address.

mac address WiFi configuration and security settings of ZTE ZXDSL 531 ADSL Modem

Click on the “MAC filter” menu of the Modem configuration page.  In this page you can see MAC Restrict mode “Disabled” , “Allow” and “Deny”. The default setting is “Disabled”.

Click on the Add button below and enter the noted down MAC address .

mac address2 WiFi configuration and security settings of ZTE ZXDSL 531 ADSL Modem

Important: You might have noted down the MAC Address like this 02-14-C4-C2-98-26 but if you enter like this Modem will display an error message “invalid MAC address”. You have to replace the “-“ with “:” means to enter the address like 02:14:C4:C2:98:26

Then click “save/apply” button. Now your MAC address has been added. Like this way  enter the MAC addresses of all the machines intended to use with the WiFi network.

Now you can optionally allow or deny a particular or group of machines on your WiFi network. If you want to allow one or more machines – Set the “Allow” option and select the MAC addresses of corresponding machines to be allowed. To deny a particular machine , set the “Deny” option and select the machine to be denied.

Advanced settings

In the advanced settings menu of ZTE 531, you can configure advanced features of the wireless LAN interface. You can select a particular channel on which to operate, force the transmission rate to a particular speed, set the fragmentation threshold, set the RTS threshold, set the wake up interval for clients in power-save mode, set the beacon interval for the access point, set XPress mode and set whether short or long preambles are used.

In the standard conditions the default setting will work. You need not to configure anything.

Settings in Computer

In the Control Panel select Network connections and Right click on the Wireless Network connection. Select “View Available Wireless Networks”. A “wireless network connection” dialogue box will be opened which display the available connections within the range. Select your WiFI network and click “Connect” . Here you have to enter the same key which has been set in your Modem.


  • harjinder 08/29/2010, 10:51 AM Reply

    My ipod touch successfully connected to network but no website is opening Please help

    • Pankaj Pal 10/15/2010, 3:37 PM Reply

      You need to configure your modem as always on. It means on your computer your broadband connection’ll be as ‘always on: requiring no manual connect’. After that your modem’ll on and connect to internet without manual connection making. And now you can open sites on your Touch.

      • Anurag 12/08/2011, 12:51 AM Reply

        Can u tell how to put the modem on always on mode?
        I m unable to find the option.

        Thanx in advance

  • Ilham Husain 09/18/2010, 3:05 PM Reply


    How to use teamviewer?

  • Silki Garg 11/21/2010, 5:36 PM Reply

    Securing your wifi routers is the prime thing before starting to use it.
    I have seen many people even leaving their routers open. Some of the even do not care to change their default passwords and login details.
    I just prepared a list of more than 500 models of routers and their default passwords. This link is there in my name.


    • Sujith 11/21/2010, 5:43 PM Reply

      Good work Silki. Thanks

  • Jitan 11/30/2010, 11:05 AM Reply

    i have this modem at home, i was trying to connect ipod touch to do facetime, but looks like some ports are blocked due to which i could not able to do facetime. Can you please tell me how to fix it?
    Thanks in advance.

    • Sujith 11/30/2010, 11:18 AM Reply

      Hi Jitan, I have no experience with facetime. In the PPPoE mode by default the ports are blocked. You need to open the required ports same as in the case of torrents applications. Go through thsi http://foribb.blogspot.com/2010_07_01_archive.html and you will get some idea about the port forwarding. If you are facing difficulty in opening the port you are free to contact.

  • Abdul Nafih 01/25/2011, 3:44 PM Reply

    hi i am nafih
    i can only acces internet my phone through my phone when desktop is connected. when i turn desktop off , in my phone web page wont come..

  • Gautam Mohan 02/24/2011, 9:39 PM Reply

    thank you so much Sujith, your help in getting my modem configured was amazing. Very nice experience. Please keep up the good work.

  • Joy Halder 03/25/2011, 7:59 PM Reply

    Thanx a ton, Sujith. This is some amazing stuff yoy have here.

  • Naman Rajpal 04/10/2011, 1:36 AM Reply

    ..i have a desktop PC nd and this MOdem…nd i want to connect my phone to it..but i dont know what is SSID nd how hud i come to know bout it..i have no idea what it is..

    • Sujith 04/10/2011, 12:27 PM Reply

      SSID is for identification. You can use anything. Eg; Your name or something like that

  • Naman Rajpal 04/10/2011, 1:03 PM Reply

    Thank u sir,…
    i succesfully connect my SAMSUNG OMNIA WINDOWS PHONE to it..my phone is showing that it is connected to ZTE succesfully but i m not able to open any site…..kindly Help..nd i am Very VEry thank full for the previous help….

    • Sujith 04/10/2011, 1:06 PM Reply

      In which mode you have configured the modem? Always on mode (PPPoE Mode) or Dial up mode?

      • Naman Rajpal 04/11/2011, 10:54 AM Reply

        i wud like to confirm whether i have to check the botton below the MAC filtering option or do i have to leave it unchecked……i have selected ALOW button already….i have added two MAC addresses in the box ..so do i have to check them both to allow them to ccess the sites???…though they are unchecked now but my both the Windows phone and the androd phone are getting connected but not showing up the websites…….:)

  • Naman Rajpal 04/11/2011, 10:55 AM Reply

    nd yes i ahev configured my Modem in PPPoE mode

  • Ananda Saha 04/20/2011, 5:57 PM Reply

    I configured the ZTE ZXDSL 531B router in PPOE mode, set MTU-1442, but still yahoo & hotmail not opening.Plz help

    • Sujith 04/20/2011, 6:20 PM Reply

      It may be due to DNS issues. Clear all browser cache , Go to start > run> cmd and type
      Now try again

  • naman rajpal 04/20/2011, 7:17 PM Reply

    Sir… thanks for your suggestions….. my router was not working or properly.. but now it do…thank u very much…u r d best

  • sunil singh 07/22/2011, 10:43 AM Reply

    i conect my laptop but i can’t open my homepage plz help me

  • Kapil Tirode 08/04/2011, 5:52 PM Reply

    sir i configured the bsnl modem for wifi connectivity. it connects on to my phone nokia c3 but i cannot open any website. please help

  • Kapil Tirode 08/04/2011, 5:55 PM Reply

    i have configured my modem over pppoe mode

  • Atul Goyal 09/28/2011, 1:02 PM Reply

    How to reset bsnl ZTE modem . I am also not able to connect to . DCPH Enable is showing no . Please Help , status is showing limited connectivity

    • Sujith 09/28/2011, 7:26 PM Reply

      Here the Reset Button. Press it for few second with a match stick or something like that

      • atul goyal 09/28/2011, 11:21 PM Reply

        Thank you so much for the help . There is one more question . I want to connect my mobile phone with the modem through wifi . I am able to connect it when the connection is establish through my computer . But as soon as I disconnect the computer the wifi connection on mobile phone also goes out . Please tell me how to connect the mobile with the modem through wifi without switching on the computer . I have searched somewhere and found that might be done through enabling PPPoE always on but , I also do not know that

  • Ravi 10/02/2011, 9:39 PM Reply


    pl tell me i want to add my cable internet connection on zte wireless modem. cable internet connection getting dhcp mode. so how to configure and work with this modem.

    • Sujith 10/03/2011, 12:17 AM Reply

      This Modem is not compatible with Cable internet connections.

  • Heera 10/12/2011, 7:50 PM Reply

    i have zte zxdl wifi mode of bsnl how to create password & whic format give me example pls

  • harvinder singh 10/23/2011, 7:22 PM Reply

    my samsung galaxy s is getting connected to Wifi ZTE modem and showing good strength connectivity but still unable to acces internet.plz sugest.

  • Sabrita 11/03/2011, 2:33 PM Reply

    I have nokia x3-02 phone and it has wi-fi facility in it and I have ZTE ZXDSL 5316 home modem. When I search for wlan through my phone it connects sucessfully to the modem but when I try to browse net using zte modem it shows link not available try again. plz help me out. plz do answer in a procedure manner. Thank you.

    • Harvinder singh 11/04/2011, 11:03 AM Reply

      even i had similar problem with my wifi connection while connecting my mobile with zte modem.
      The mistake i was doing was that i haven’t kept my modem always open for connection. I always used to connect by giving user name and passward which alows only connection with the pc where i have looged in.
      Once i have st username and passward n MODEM for BSNL broadband connectivity ,the connection became always open once the modem is switched on.This solved the problem of accesssing internet.
      I hope once you make this configuration the connection will work, also enable for 801.1X setting.

  • Vikas Saini 01/02/2012, 10:02 PM Reply

    Dear sir, i need ur help…

    I have ZTE-ZXDSL-531 ADSL Modem.
    i want to use this modem. for extend my wireless range……

    i have a other modem connected with BSNL broad band ….and i received wireless range… but signal strength is not gud so ..please help me how to configure modem…

    Sorry for my English is not so gud so need ur help …….

    Thanks & Regards
    Vikas Saini…

  • PRAKASH 03/12/2012, 1:56 PM Reply

    Dear Sir,
    pl help me to cofigure my BSNL adsl modem ZTE 531 in bridge mode with I-Ball 150 N router.

    • Nishant 08/05/2012, 3:26 PM Reply

      Did you get to set your modem in bridge mode

  • sandip 04/18/2012, 6:35 PM Reply

    i have zte zxdsl 531b type modem. In this modem i don’t see “wireless” menu i think wireless menu will hiden or something else but i can’t understand what happens and what can i do ?

  • akshay 04/19/2012, 9:22 PM Reply

    @sandip: use internet explorer & click or double click on main headings, ur wireless option maybe have gone under the sub options of the menu.

    Dear Sujith Sir,
    i configured my modem in pppoe mode, & then configured my wifi so tht my wifi is always on without having to login all the time, with wpa2-psk pasword setting, thanks to you.

    my new issue is that i want my zte dsl modem to be always on 801.11 n-mode.
    i’ve heard tht out of 801.11b/g/n, n-mode of wifi is more faster tha b or g-mode.

    i currently get 801.11g-mode, how to open or enable 8011.11n mode?

  • puneet 04/27/2012, 10:43 PM Reply

    i have macbook pro with version 10.7.3
    and i access internet on my windows laptop and mobiles bt i cannot accces through macbook

  • Fru Gustave 05/25/2012, 12:20 PM Reply

    please i have these modem zte zxdsl 831b at home and to be honest with you i dont what it is or how it works please help me explain to me how it works.

  • arjun 08/14/2012, 2:00 PM Reply

    sir,i connected to the internet but cant download anything with downloading software like idm…….please help

  • vicky 11/11/2012, 6:37 PM Reply

    my nokia c3 conncted to zxdsl 531b and show ful rang …but no web site is open

  • NANDU 11/13/2012, 3:25 PM Reply


  • anubhav jain 11/30/2012, 3:43 PM Reply

    How to reset bsnl ZTE modem . I am also not able to connect to . DCPH Enable is showing no . Please Help , status is showing limited connectivity.

    i am using ZTE ZXDSL 531B modem

    plz help me t connect

  • NARU 12/12/2012, 9:24 PM Reply

    Hi Techie Friends,
    I am using BSNL Broad Band connection with ZTE router for wi-fi, in am using wifi on my laptop with PPPoE , i would like to configure wifi on my Mobile phone sony xperia J. when i switch on the wifi it shows connected but internet is not getting connected. can some techie could held me to configure

    • Sujith 12/12/2012, 9:37 PM Reply

      Check the date and time settings of your router and Mobile Phone.If it is not matching, do the changes and try.
      If not working, instead of using DHCP, use static ip address in phone wifi settings.

  • Manish K Gupta 03/13/2013, 11:51 AM Reply

    Hi Sujith,

    I have been following a lot of posts on how can I enable wifi on my ZTE ZXDSL 531 B router

    What I have been able to achieve is this
    I switched to PPPoE but sometimes my computer which is connected on a LAN with the modem looses internet connectivity, so I have to switch back to bridge mode

    Second I can see wifi on my phone and connect it but when I try to open any connection to the internet from phone browser or an app, it does not connect as there is no connection with the internet

    Also when I go to the WAN summary tab, following happens
    When the PPPoE shows down I am able to connect to the internet on PC but not on phone
    but when it shows up I am not able to connect to the internet on any of the devices

    Can you please help me in any way?


    • Sujith 03/25/2013, 9:53 PM Reply

      Assign a static IP to your PC. Occasional DHCP issues happens with WiFi.

  • sourav sharma 03/18/2013, 11:43 AM Reply


  • Sudershan Kamra 03/27/2013, 4:50 PM Reply

    I have BSNL Broad Band connection having ZTE ZXDSL 531 Modem. I am not able to connect my Laptop on WiFi without cable. Please solve the problem

  • Rajiv Singh 03/31/2013, 1:48 PM Reply

    Dear Sir
    How does block a website on ZTE zxdsl531B.
    Please do needful.

  • Anand Patel 04/06/2013, 8:57 PM Reply

    How about restoring factory settings?

  • Jigar Patel 04/07/2013, 12:48 PM Reply

    I have BSNL Broad Band connection having ZTE ZXDSL 531 Modem. I am able to connect my computer via PPPoE but when I start it wireless wifi connections in my Laptop / mobile wifi detect & after enter the wlan key signal known found but when i start the browsing browser can not detect the website. Please solve the problem

  • Joey 04/18/2013, 4:35 AM Reply

    I was wondering if you can help me with this problem. I have a ZTE ZXHN H108N and when I want to add a mac address to block i have two places to fill :Source Mac address and destination mac address. I figured source mac address is the one i want to block but what do i put in the second one?

  • Tawhida 06/05/2013, 3:07 PM Reply

    Can the guest network be secured with a password. Please guide how. My wifi is password protected by the guest network does not require a password for connection.

  • paras gaonkar 06/16/2013, 8:38 PM Reply

    I m unable to open any sites on my cellphone and laptop even though they are connect through wifi. I m using a ZTE ZXDSL 531B modem. I made the changes for basic and security. Please tell me what should i do.

    Thank you.

  • DEBRAJ MODAK 07/13/2013, 10:29 PM Reply

    my SAMSUNG GALAXY ACE DUOS S6802 PHONE to it..my phone is showing that it is connected to ZTE succesfully but i m not able to open any site…..kindly Help..

  • Thilak Malawara Arachchi 07/26/2013, 1:33 PM Reply

    SLT recently replaced my modem with wireless ZTE router, Peo TV and adsl wired connection is ok, but wireless is not working ( to laptop and Ipad ) , can you please let me know how could I solve this matter

  • vansh 08/13/2013, 12:11 PM Reply

    sir please give me detail about how to connect wifi in ZTE router.

  • jimmy 10/10/2013, 3:02 PM Reply

    hi, i have ZTE ZXDSL531B modem + router.
    i am unable to config my wireless network to my windows 7 laptop.
    can u help me out plz.
    i jst want to usw wireless network as my modem is connected to pc

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  • browser 01/11/2014, 8:15 AM Reply

    Does anybody happen to know how to change the modem password?
    The default being username: admin/password: admin

  • Daoui 05/17/2014, 7:56 PM Reply

    Hi plz tell me how to deny viber application to access to my all network that mean i want viber not connect in Android phone or nokia or iPhone or pc in my network im using zte modem plz help

  • rajkumar 06/05/2014, 4:54 PM Reply

    will bei able to use wifi from mobile after following these steps?

  • dany 06/07/2014, 12:30 AM Reply


  • fb.com/krawa14 08/11/2014, 1:16 PM Reply

    Your DSL router is ready to connect to Internet, but There is no ppp session defined.

    it doesn’t show advanced option.

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