LDAP authentications fail in APEX

Similar Questions

• Authentication failed LDAP WebLogic 10.3.2 after the Patch of DC MS14 - 066 (KB2992611)

  I have configured an LDAP authenticator in my 10.3.2 WebLogic domain. Connection worked until the domain controller has been patched with MS14-066 (KB2992611). Domain controller OS is Win Server2008R2 (x 64).

  The log file after a restart of the domain service looks like this:

  <>< BEA-000000 authenticate the user: weblogic >

  <>< BEA-000000 new LDAP connection for local connection to use port 636 xxx.xxx.com host is false >

  <>< BEA-000000 created new LDAP LDAPConnection connection {ldapVersion:2 bindDN: ""} >

  < BEA-000000 > < netscape.ldap.LDAPException connection failed: encryption algorithm not initialized (91) >

  < BEA-000000 > > < [Security: 090294] couldn't make connection >

  Hopefully, you can help

  Thank you

  Installation of the MS14-066 update patch has solved the problem.

• LDAP authentication scheme has stopped working

  I have two servers, each with its own DB and APEX applications. To simplity, let's call them A and b. authentication is handled through a LDAP schema - and this regime is the same on both servers. After a few patches on A (I have yet to find out what that this application of fixes) I am no longer able to connect to one of the applications. However, using the same user/pass I can connect fine on server b (not talking dev backend for APEX, just the connection of the ordinary user in an application). Also, I changed absolutely nothing about the applications or the authentication scheme. So for now, I'm running with the idea that something happened during the patch.

  Here are the APEX vs on both servers:

  A: APEX 3.2

  B: APEX 4.0

  Looking at the authentication scheme, trying to detect the differences, the only thing I could find is that B also has a "Use SSL" option. But it is set to N, in any case. Yet once, these worked very well they were until now.

  I decided to test and run the following code on both servers:

  BEGIN
  IF APEX_LDAP.AUTHENTICATE(
      p_username =>     'user.name',
      p_password =>     'ultrasecretpassword',
      p_search_base =>  'cn=users dc=my, dc=domain, dc=com',
      p_host =>         'host.my.domain.com',
      p_port => 389) THEN
      dbms_output.put_line('authenticated');
  ELSE
      dbms_output.put_line('authentication failed');
  END IF;
  
  
  END;
  

  Not surprisingly, that said "authenticated" on B, and 'authentication failed' in a.. So, I decided to go a little further and run the following:

  -- Code by Scott Spadofore
  -- OTN: https://forums.oracle.com/forums/thread.jspa?threadID=954602
  DECLARE
    l_retval PLS_INTEGER;
    l_retval2 PLS_INTEGER;
    l_session dbms_ldap.session;
    l_ldap_host VARCHAR2(256);
    l_ldap_port VARCHAR2(256);
    l_ldap_user VARCHAR2(256);
    l_ldap_passwd VARCHAR2(256);
    l_ldap_base VARCHAR2(256);
  BEGIN
  
    l_retval := -1;
    dbms_ldap.use_exception := TRUE;
    l_ldap_host := 'host.my.domain.com';
    l_ldap_port := '389';
    l_ldap_user := 'cn=user.name,cn=users, dc=my,dc=domain,dc=com';
    l_ldap_passwd := 'ultrasecretpassword';
  
    l_session := dbms_ldap.init(l_ldap_host, l_ldap_port);
    l_retval := dbms_ldap.simple_bind_s(l_session,
    l_ldap_user,
    l_ldap_passwd);
    dbms_output.put_line('Return value: ' || l_retval);
    l_retval2 := dbms_ldap.unbind_s(l_session);
  
  EXCEPTION
    WHEN OTHERS THEN
      dbms_output.put_line(rpad('ldap session ', 25, ' ') || ': ' ||
      rawtohex(substr(l_session, 1, 8)) || '(returned from init)');
      dbms_output.put_line('error: ' || SQLERRM || ' ' || SQLCODE);
      dbms_output.put_line('user: ' || l_ldap_user);
      dbms_output.put_line('host: ' || l_ldap_host);
      dbms_output.put_line('port: ' || l_ldap_port);
  
      l_retval := dbms_ldap.unbind_s(l_session);
  END;
  

  VERY surprisingly (or unfortunately), it displays the same thing on both A and B: "return value: 0.

  Go to B and APEX LDAP test, I found that if I enable SSL, auth begins without too much. Clearly, it should be turned off to make it work. I'm picking on it because it's the only difference I could find between the two: A, being an older version does not have any what specifications on whether or not to use SSL (and I guess it's not, because I can't find anything in the docs).

  In the APEX, the DN is:

  cn=%LDAP_USER%,cn=users, dc=my,dc=domain,dc=com
  

  ... and uses no edit function, or anything like that. It's as simple as the host name, port, DN

  I am at a loss here, so any help would be appreciated! Thanks in advance!

  Finally two thoughts.

  During the ACL test - make sure this isn't a privileged account.   Users like SYS will bypass the ACL and give false positives.

  Second - the script you have above is designed for the APEX 4.1 (APEX_040100).  Make sure you adjust respectively for APEX 3.2 or 4.2.

  Also, if you want a few quick scripts to test / display the ACL settings, there are examples all over the internet.  I've added a few to the pile here: Oracle ACL configuration Scripts. W.P. Hill Tech

  Maybe they will help.

  Good luck.

  -Tim St.

• Directory LDAP authentication scheme does not

  I did some research on how to use active directory for authentication and it seems pretty obvious, but it does not for me in the APEX, while trying to authenticate the Works database.

  I created a new authentication system

  System type: LDAP Directory Service

  Host: < < Directory Server Active > >

  Port: 389

  DN: < < FIELD > > \%LDAP_USER%

  Use the distinguished name exactly: Yes

  I made sure that the new authentication scheme is underway.

  What application is running and I'm trying to connect, debug displays:

  ... Authentication failed: Invalid Login Credentials < div id = "apex_login_throttle_div" > please wait < span id = "apex_login_throttle_sec" > seconds 30 </span > to log in again. < / div

  But, I ran a test database using this code below that I found on the web and it runs without exception, so I don't know my settings, domain, host, port, user and password are correct.  Y at - it a step that I forget?

  DECLARE

  l_retval PLS_INTEGER;

  l_retval2 PLS_INTEGER;

  l_session dbms_ldap.session;

  l_ldap_host VARCHAR2 (256);

  l_ldap_port VARCHAR2 (256);

  l_ldap_user VARCHAR2 (256);

  l_ldap_passwd VARCHAR2 (256);

  l_ldap_base VARCHAR2 (256);

  BEGIN

  l_retval: = - 1;

  dbms_ldap.use_exception: = TRUE;

  l_ldap_host: = '< < ad server > > ';

  l_ldap_port: = '389';

  l_ldap_user: = ' < < MY AREA > >-< < my user > > ';

  l_ldap_passwd: = '< < password > > ';

  l_session: = dbms_ldap.init (l_ldap_host, l_ldap_port);

  l_retval: = dbms_ldap.simple_bind_s(l_session,l_ldap_user,l_ldap_passwd);

  dbms_output.put_line (' return value: ' | l_retval);

  l_retval2: = dbms_ldap.unbind_s (l_session);

  EXCEPTION

  WHILE OTHERS THEN

  dbms_output.put_line (rpad ('ldap session', 25, ' ') |) ': ' ||

  RAWTOHEX (substr (l_session, 1, 8)).

  '(retourné depuis init)");

  dbms_output.put_line (' error: ' |) SQLERRM | ' ' || SQLCODE);

  dbms_output.put_line (' user: ' | l_ldap_user);

  dbms_output.put_line (' host: ' | l_ldap_host);

  dbms_output.put_line ('port: ' | l_ldap_port);

  l_retval: = dbms_ldap.unbind_s (l_session);

  END;

  Hello

  If it works in the database, perhaps it is a typing error in your frame at the APEX?

  Create PL/SQL processes "on the charge before the header' on connection and as a PL/SQL block page for this entry process:

  begin
    APEX_DEBUG.ENABLE(apex_debug.c_log_level_engine_trace);
  end;
  

  Then run application, try to login and check the debug information. Maybe you'll find some clues to solve your problem.

• LDAP authentication does not

  I'm trying to authenticate to our Active Directory. Makes the composition of the DN string look appropriate? (The names have been changed to protect the innocent)... I use the tool to Test of LDAP in dialog box "edit authentication scheme. I get the red message "authentication failed!"
  
  String DN: cn = % LDAP_USER %, or = users, or = production, dc = bitter, dc = globalaxz, dc = net
  Host: dc3axz001.amer.globalaxz.net
  
  I tried to reduce the chain just ldapuser, bitter, globalaxz, net (depending on the format of the FQDN of the host server) without success. I don't know if I'm simply not defining the DN string correctly... or what.
  
  I don't know if the tool will "walk" to the bottom of the structure of the AD to find a match (or within the OU) - or he asks only one OU for the username?
  
  Apex 3.2.1 on Centos 5.4 (RedHat).

  RESOLVED:

  Instead of using this field of the DN:
  CN = % LDAP_USER %, bitter = DC, DC is domain_name, DC = net

  I used:
  % [email protected]

  worked very well. Thanks to all who helped.

  Rich

  Published by: rdarlin2 on December 14, 2009 16:57

• LDAP authentication on vty router login

  I'm trying to deploy authentication ldap (AD MS) for a connection vty router. I used the manual like this - http://www.cisco.com/en/US/docs/ios-xml/ios/sec_usr_ldap/configuration/15-2mt/sec_conf_ldap.html

  But my scenario was unlucky

  My config is...

  _____

  AAA new-model

  !

  !

  AAA server ldap ad1 group

  test server

  !

  AAA authentication login default group local ad1

  AAA authorization exec default authenticated if

  !

  jump...

  !

  map1 LDAP attribute-map

  user name of card type sAMAccountName

  !

  test LDAP server

  IPv4 172.16.107.145

  attribute map map1

  Retransmission Timeout 20

  bind authenticates root-dn CN = Administrator, CN = users, DC = fabrikam, dc = com password 7 02050D 480809

  base-dn CN = users, DC = fabrikam, dc = com

  _____

  instead of "ldap attribute-map map1" I tried to use "search user-object-type-filter name. No effect

  I used wireshark for sniffer of cisco to AD packages. No package at the port of AD (389 or 3268) have been captured.

  I used the ldap debugging all the

  This is the output

  * Jun 9 19:38:45.414: LDAP: LDAP: AAA Queuing 117 of treatment application

  * Jun 9 19:38:45.414: LDAP: received the queue event, new demand for AAA

  * Jun 9 19:38:45.414: LDAP: LDAP authentication request

  * Jun 9 19:38:45.414: LDAP: no attributes to check username mental health

  * Jun 9 19:38:45.414: LDAP: name of user/password validation test failed!

  * Jun 9 19:38:45.414: LDAP: LDAP not suport interactive logon

  Note the last string. Is that what it means I can't use ldap for this?

  What I've done wrong?

  I am grateful for!

  LDAP on IOS support is limited to the VPN authentication and unfortunately cannot be used for authentication of the Admin (exec).

  CSCug65194    Document nonsupport LDAP for authentication of connection

  AAA does not support using a LDAP method for interactive logon authentication. Customers can configure 'aaa authentication login default group ldap', but when an interactive session (Terminal) attempts to authenticate via the LDAP protocol, the

  following message is syslogged:

  "LDAP: LDAP does not support interactive logon [sic]."

  This is due to the aaa/ldap/src/ldap_main.c of next record ldap_authen_req():

  If (intf & intf-> ATS) {}

  LDAP_EVENT ("LDAP don't suport interactive logon");

  ldap_method_failover (proto_req);

  Jatin kone
  -Does the rate of useful messages-

• UCS Manager 2.2 - LDAP authentication

  Hello

  I have some general questions about authentication LDAP and UCS Manager.

  I hope it's unterstandable...

  We have the following structure:

  • DC = Company.domain.com
    • OU = Domain Administration
      • OU =Administrators
        • UO = Germany
          • CN = User1-SMA
          • CN = SMA-user2
      • OU = Test-UO
        • CN = ucstestuser
        • CN = ucsadmingroup--> Member = SMA-user1, user2-SMA
          

  I added an LDAP provider

  binduser is the SMA-User1

  Base DN = OU = Domain Administration, DC = company, DC = domain, DC = com

  attribute = empty

  filter = sAMAccountName = $userid

  password for User1 SMA

  group permission / recursive enabled.

  I have not add some attributes or map the group. Now I can connect with ucstestuser (read-only), but not with SMA-user1 user2 SMA oder.

  If I add ucstestuser to ucsadmingroup a map of this group, ucstestuser can access and have right to admin, ADM-user1 and user2-adm cannot access (user authentication failed).

  I don't understand, why ucstestuser can access and other users in a different OU not. Unique database name is domain Administration, so that UCSM should see all three users, not?

  Can anyone help? Thank you.

  / Danny

  With UCS remote authentication when a user connects using a temporary account on the FI as a UCS-MyAuthDomain\myusername, which is limited to a total of 32 characters.  If you shorten the name of domain authentication defined in UCSM domain.com to a shorter name as AD, it will allow for the use of a username any longer.

  Note

  For systems using the remote authentication protocol, the authentication domain name is considered to be part of the user name and the limit of 32 characters for usernames created locally. Because Cisco UCS inserts 5-character formatting, the authentication will fail if the name and the user character domain name combined total is greater than 27.

  http://www.Cisco.com/c/en/us/TD/docs/unified_computing/UCS/SW/GUI/config/Guide/2-2/b_UCSM_GUI_Configuration_Guide_2_2/b_UCSM_GUI_Configuration_Guide_2_1_chapter_01000.html

• Another failure of the LDAP authentication

  I'm trying to setup LDAP authentication for my ASA, as well as the AD Agent.  Currently my authentication fails with the following debug output...

  [- 2147483610] Starting a session

  [- 2147483610] New Session request, the 0xcc854d8c, reqType = authentication context

  [- 2147483610] Fiber has started

  [- 2147483610] Create LDAP context with uri = ldap://10.11.1.15:389

  [- 2147483610] Connect to the LDAP server:

  LDAP://10.11.1.15:389

  status = success

  supportedLDAPVersion [-2147483610]: value = 3

  supportedLDAPVersion [-2147483610]: value = 2

  [- 2147483610] Liaison as a Sargent\

  [- 2147483610] Authentication Simple for Sargent\ to 10.11.1.15

  [- 2147483610] LDAP search:

  Base DN = [DC = City, DC = charlottesville, DC = org]

  Filter = [sAMAccount = sargentm]

  Range = [subtree]

  [- 2147483610] The analysis of returned search results State failure

  [- 2147483610] Fiber output Tx = 308 bytes Rx = 677 bytes, status =-1

  [- 2147483610] End of the session

  ERROR: Authentication rejected: not specified

  I can however run successful AD etc., queries using the following commands.

  show the identity of the user ad-users city.charlottesville.org filter sargentm

  Ideas?

  Replace the below listed command within the parameters of the server:

  sAMAccount name-attribute LDAP

  With

  LDAP-naming-attribute sAMAccountName

  Note: the sAMAccountName is configured correctly.

  Jatin kone

  -Does the rate of useful messages-

• How LDAP query within an APEX application?

  Hi all

  I have setup an APEX application that uses the LDAP authentication and I was wondering if it is possible to request information from LDAP to complete the forms once logged into the application.

  
  

  Thanks in advance for the support everybody!
  

  view Oracle database Blog 2.0: using Active Directory to control authentication and authorization at Apex

  on authentication LDAP at the Apex.

• LDAP authentication TWICE - authentication by default custom and Oracle?

  Hi all
  
  I have create an application with 2 pages (including the login page). My login page customized (for example...) 101) uses the authentication scheme that is customized with LDAP authentication.
  
  My question is...
  When I put in my URL of the login page in IE. Apex always redirect me to another page of connection (it looks like the default Oracle login page). The URL is http://xxxx.com/pls/apex_dev/wwww_flow_custom_auth_std.login_page?...
  
  After I entered the username and password, it transfers me to my custom login page. Again, I have to enter the same username and password... Can someone tell me how can I remove/disable the default Oracle login page? Because I don't want to authenticate LDAP in TWICE. I'm really grateful if anyone can guide me how to turn off in detail.
  
  
  Thank you mnay

  The Sessison. not valid Page in the authentication scheme must be set to 101 (from the selection list). Is it? There should be nothing in the invalid Session of URL attribute.

  Scott

• El Capitan LDAP authentication

  I am trying to setup on El Capitan Macbook LDAP authentication. I've prepared OpenLDAP server on the Linux host with the necessary users. This LDAP was added in the directory as LDAPv3 with set of mappings of RFC2307 utility.

  Computer can connect to LDAP, because green circle seen in there:

  Users and groups > connection options > network server account > hostname of the LDAP server

  The problem is that the user is unable to connect by using LDAP. No matter what I go to the login prompt (including complete DN), I can see say journal entry:

  SecurityAgent: Unknown user 'adrian' connection attempt SPENT for the audit.

  How can I review more about connection?

  So that the own Apple Open Directory is based on OpenLDAP, it is not the same. Not only do you have conveniently add additional entries to OpenLDAP i.e. Apple own LDAP schema, but you also need to configure Kerberos on the Linux server as well as Open Directory uses a combination of LDAP and Kerberos for authentication.

  In my view, it is possible to do all the extra steps to get a Linux server to fully act as the equivalent of an Open Directory server, but that you're barely at half way.

  See - http://deepport.net/archives/setting-up-a-linux-server-for-os-x-clients/

  and - http://www.torriefamily.org/~torriem/wiki/computer_stuff:opendir_and_ldap

  These articles do not cover Kerberos, but perhaps of additional useful information for the previous link.

  See - http://blog.michael.kuron-germany.de/2009/04/building-your-own-opendirectory-ser ver-on-linux /

  and - http://cs.unk.edu/~zhengaw/projects/openldap-server/

• MAc OS 10.8.3 proxy authentication failed

  I use firefox 21.0 in Mac os 10.8.3.We use the proxy server for the navigation. While browsing the internet firefox invites proxy username and password, after entering the user name and password it shows the proxy authentication failed, a new series of required authentication. The same username and pssword in works well in safari in the same book of mac.

  Help, please

  Dear Dawid,

  Thanks for your valuable response.

  Thank you very much

• Satellite A100-496: WLan authentication failed because of incorrect password

  Friends,

  I use Intel PROSet Wireless user interface to connect to my wireless router.
  Because of this process, I have disabled my windows for wireless control configuration.

  However, despite the use of the property of device correct password and the password, I am unable to connect to my WiFi router.

  I get an error stating
  * "Authentication failed because of incorrect security password." *

  I use the same password key to connect wirelessly through my other laptops, and they work fine...

  I can't find the reason for this failure of authentication...
  All the world is facing a similar problem?

  Is there a way I can allow windows to control my authtication rather than Intel PRO Wireless...

  Please guide me...

  Kind regards
  Dhiraj Shetty

  Hello

  Again activate the Windows configuration and use Windows WLAN options to configure WLAN connectivity. To be honest, using Intel PROSet, this should work too.
  Try to remove the protection of password on your router for a moment and test the connectivity. To be honest, I'm sure that there is something wrong with the settings of your laptop.

  By the way: what operating system do you use?

• PPP CHAP counterpart x 3000-authentication failed

  Hello

  I just bought Linksys x 3000 a few days for my DSL to Jakarta.

  After that I configured my 3000 x, the internet connection could not go up if the PVC connection is in place.

  Here is some information of the device:

  Router information
  Firmware version: v1.0.01 build 2 November 00 22,2011
  Checking the firmware: 914eee0ceca371b4a4231c2af2f9f47f
  Current time: not available
  MAC address: 98:fc:11:dd:0e:cd
  Name of the router: linksys
  Host name:
  Domain name: telkom.net

  Internet connection
  Type of connection: RFC 2516 PPPoE
  Online status: offline
  Internet IP address: 0.0.0.0
  Subnet mask: 0.0.0.0
  Default gateway: 0.0.0.0
  DNS 1: 0.0.0.0
  DNS 2: 0.0.0.0
  DNS 3: 0.0.0.0
  MTU: 0

  DSL connection:
  Status: to the top
  Download speed: 1215 Kbps
  Upstream speed: 442 Kbps

  Connection of PVC
  Encapsulation: RFC 2516 PPPoE
  Multiplexing: LLC
  Type of QoS: UBR
  PCR:
  SCR:
  Automatic detection: disable
  VPI: 0
  VCI: 35
  Activated: Yes
  PVC status: to the top

  And here's what I got in the system log:

  PPP pilot generic version 2.4.2 79
  Deflate Compression of PPP module part 88
  PPP BSD Compression module part 84
  PPPoL2TP kernel driver, 75 V1.0
  ccp_autowan_sm_thread => starts in unconfigured mode, detection of State! 125
  -> State disconnected! 78
  xDSL G.994 training 74
  -> detection of State! 75
  -> dslWanSt = 1, ethWanSt = 0 81
  -> Training RJ11 condition! 79
  ADSL G.992 started 73
  Analysis of channel ADSL G.992 82
  ADSL G.992 82 message exchange
  Link up, carrier 0 ADSL, = us 442, ds = 1215 94
  -> RJ11 State! 70
  PPP-online Start connect... 78
  PPPoE PADI sending. 69
  PPPoE received PADO. 70
  PPPoE sending PADR. 69
  PPPoE server detected. 72
  PPPoE received PADS, session PPP set up. 95
  PPP sends ConfReq id = 0 x 1 [0xb65fbae2 magic] 91
  PPP receive ConfAck id = 0 x 1 [0xb65fbae2 magic] 94
  PPP receive ConfReq id = 0 x 2 [mru] 1492 [auth chap, MD5] [0xc118f417 magic] 121
  PPP sends ConfAck id = 0 x 2 [mru] 1492 [auth chap, MD5] [0xc118f417 magic] 118
  PPP LCP UPWARD. 61
  PPP receive challenge id = 0 x 1, <2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x>, name = 127 Huawei
  PPP receive failure id = 0 1 76 x
  PPP CHAP 84 peer authentication failed
  PPP LCP DOWN. 63
  PPP sends TermReq id = 0 x 2 could not authenticate ourselves Exchange 113
  PPP (LCP) send reason Terminate-Request Failed to authenticate ourselves pair. 131
  PPP User name and password authentication failed. 98
  PPP receive id = 0 3 75 x TermReq
  PPP sends TermAck id = 0 3 72 x
  PPP sends TermReq id = 0 x 3 could not authenticate ourselves Exchange 113
  PPP (LCP) send Terminate-Request reason FM timeout. 101
  PPPoE sent PADT. 69
  PPP-online Start connect... 78
  PPPoE PADI sending. 69
  PPPoE received PADT, meeting took end. 94
  PPPoE received PADO. 70
  PPPoE sending PADR. 69
  PPPoE server detected. 72
  PPPoE received PADS, session PPP set up. 95
  PPP sends ConfReq id = 0 x 4 [0xc890720f magic] 91
  PPP receive ConfAck id = 0 x 4 [0xc890720f magic] 94
  PPP receive ConfReq id = 0 x 2 [mru] 1492 [auth chap, MD5] [0xb4a2146c magic] 121
  PPP sends ConfAck id = 0 x 2 [mru] 1492 [auth chap, MD5] [0xb4a2146c magic] 118
  PPP LCP UPWARD. 61
  PPP receive challenge id = 0 x 1, <2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x>, name = 127 Huawei
  PPP receive failure id = 0 1 76 x
  PPP CHAP 84 peer authentication failed
  PPP LCP DOWN. 63
  PPP sends TermReq id = 0 x 5 failed to authenticate ourselves Exchange 113
  PPP (LCP) send reason Terminate-Request Failed to authenticate ourselves pair. 131
  PPP User name and password authentication failed. 98
  PPP receive id = 0 3 75 x TermReq
  PPP sends TermAck id = 0 3 72 x
  PPP sends TermReq id = 0 x 6 failed to authenticate ourselves Exchange 113
  PPP (LCP) send Terminate-Request reason FM timeout. 101

  Does anyone have the same experience?

  Please advice.

  Thank you.

  Oh, I'm sorry, I just found out that I put the wrong password PPPoE. After you type the correct password, it works now. Thank God...

• What does "wireless authentication failed because of a time-out" mean?

  Have a combo unit router and modem.  Having two computers.  You can use the wireless that the other cannot use Wired.  Getting messages like "wireless authentication failed because of a time-out," conflict of IP address and canceled due to the delay.  There was a variety of messages.  We had been able to use a router before, but it would be turned off every two hours or more.  Giving the same messages on Windows Vista.  The other computer is Windows XP Motorola
  modem/router.

  Hello

  1. what security WEP, WPA, etc. Do you use?
  2. is the driver software updated for the router to work correctly on Vista computer?

  I suggest you to follow these steps and check if that helps:

  Method 1:
  I suggest you to check if you can connect by using a different port or a different router in case the problem is with the router itself.

  Method 2:
  You can also visit the link provided below, which offers a similar problem resolution. Check if the steps to help you resolve the problem.
  http://social.answers.Microsoft.com/forums/en-us/vistanetworking/thread/4db4caa0-86bb-4b7b-8aa7-252d5653f063

  It will be useful.