Can't get to certain web sites from inside office Lan

Hi,

Please check the DNS settings of the newly installed laptops. If this is pointed to an internal DNS server, please query a certain sites using the nslookup command and see if it can resolve the site. Try also flushing or registering its dns by employing the command

ipconfig /flushdns
ipconfig /registerdns

There are numerous reasons. Please elaborate if :
- Do the websites not open at all,
- are they loading partially?

Here is a check list of what I think are the most common causes:
- DNS. This is the fist thing to check:

nslookup facebook.com 8.8.8.8
nslookup facebook.com

Select allOpen in new window

Compare the outputs. If you do get a srvfail in the second nslookup, check your forwarders in your internal DNS.

- Do you use multiple Load Balanced WAN Links? This can cause the trouble, if configured incorrectly. Check your firewall settings.

- Are the target IPs to facebook ect. for some reason blocked on your firewall? I mean not by DNS name but by IP ranges?

Sorry for the long delay in replying, i've attached a screen shot from the command prompt when I run NSLOOKUP.

any thoughts?

Also Wikipedia loads but not fully - http://en.wikipedia.org/wiki/Main_Page

Also i've changed to the google DNS made no different

i've attached a screen shot

Please do attach the screen shot, I fail to see it?
and also post the output of:

nslookup -debug facebook.com

Select allOpen in new window

Please make sure you run this on an affected computer/network.

If you have issues with partial loading pages, then this is another issue. Open the page in a browser (for instance Chrome) and enable debug console, <CTL><SHIFT><C>.

Ok this is the result of running debug

C:\Users\ip2>nslookup -debug facebook.com
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 1, rcode = NOERROR
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 0,  additional = 0

    QUESTIONS:
        8.8.8.8.in-addr.arpa, type = PTR, class = IN
    ANSWERS:
    ->  8.8.8.8.in-addr.arpa
        name = google-public-dns-a.google.com
        ttl = 19387 (5 hours 23 mins 7 secs)

------------
Server:  google-public-dns-a.google.com
Address:  8.8.8.8

------------
Got answer:
    HEADER:
        opcode = QUERY, id = 2, rcode = NXDOMAIN
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 1,  additional = 0

    QUESTIONS:
        facebook.com.wisemanlee.co.uk, type = A, class = IN
    AUTHORITY RECORDS:
    ->  wisemanlee.co.uk
        ttl = 1800 (30 mins)
        primary name server = a4.nstld.com
        responsible mail addr = dnssupport.verisign-grs.com
        serial  = 2279434084
        refresh = 28800 (8 hours)
        retry   = 7200 (2 hours)
        expire  = 1209600 (14 days)
        default TTL = 86400 (1 day)

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 3, rcode = NXDOMAIN
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 1,  additional = 0

    QUESTIONS:
        facebook.com.wisemanlee.co.uk, type = AAAA, class = IN
    AUTHORITY RECORDS:
    ->  wisemanlee.co.uk
        ttl = 1800 (30 mins)
        primary name server = a4.nstld.com
        responsible mail addr = dnssupport.verisign-grs.com
        serial  = 2279434084
        refresh = 28800 (8 hours)
        retry   = 7200 (2 hours)
        expire  = 1209600 (14 days)
        default TTL = 86400 (1 day)

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 4, rcode = NXDOMAIN
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 1,  additional = 0

    QUESTIONS:
        facebook.com.co.uk, type = A, class = IN
    AUTHORITY RECORDS:
    ->  co.uk
        ttl = 1800 (30 mins)
        primary name server = ns1.nic.uk
        responsible mail addr = hostmaster.nominet.org.uk
        serial  = 1303250194
        refresh = 900 (15 mins)
        retry   = 300 (5 mins)
        expire  = 2419200 (28 days)
        default TTL = 10800 (3 hours)

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 5, rcode = NXDOMAIN
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 1,  additional = 0

    QUESTIONS:
        facebook.com.co.uk, type = AAAA, class = IN
    AUTHORITY RECORDS:
    ->  co.uk
        ttl = 1800 (30 mins)
        primary name server = ns1.nic.uk
        responsible mail addr = hostmaster.nominet.org.uk
        serial  = 1303250194
        refresh = 900 (15 mins)
        retry   = 300 (5 mins)
        expire  = 2419200 (28 days)
        default TTL = 10800 (3 hours)

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 6, rcode = NOERROR
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 0,  additional = 0

    QUESTIONS:
        facebook.com, type = A, class = IN
    ANSWERS:
    ->  facebook.com
        internet address = 173.252.110.27
        ttl = 69 (1 min 9 secs)

------------
Non-authoritative answer:
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 7, rcode = NOERROR
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 0,  additional = 0

    QUESTIONS:
        facebook.com, type = AAAA, class = IN
    ANSWERS:
    ->  facebook.com
        AAAA IPv6 address = 2a03:2880:2110:df07:face:b00c:0:1
        ttl = 35 (35 secs)

------------
Name:    facebook.com
Addresses:  2a03:2880:2110:df07:face:b00c:0:1
          173.252.110.27


C:\Users\ip2>

Sorry helge000 - Not sure what you want me to do?

Should I post results of another site what won't load?