I can open a webpage using 3G or 4G but if I am logged on to a WIFI it doesn't open

I would look at your network settings. apple icon > system preferences ... > network

report back what you have.

I see:

mine are a little odd so do not copy. You could change your dns to 8.8.8.8 and 8.8.4.4. This is the google dns

You could try changing you dns address.

click on advanced. Lower right of the networking pane. [ image is chopped off . ]

with the new pane, click on dns. click on plus sign lower left.

Enter google's dns addresses. They are faster & more secure I hear.

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You can use

/System/Library/CoreServices/Applications/Network Utility.app

or for older os's:

/applications/utilities/network utility

to diagnose the situation.

You can ping google.com.

Result:

Ping has started ...

PING google.com (64.233.167.99): 56 data bytes

64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=215.362 ms

64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=279.597 ms

64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=189.747 ms

64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=250.657 ms

64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=183.232 ms

64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=243.753 ms

64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=173.108 ms

64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=230.239 ms

64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=180.639 ms

64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=232.177 ms

--- google.com ping statistics ---

10 packets transmitted, 10 packets received, 0% packet loss

round-trip min/avg/max/stddev = 173.108/217.851/279.597/33.615 ms

If that does not work, try pinging 64.233.167.99 Result:

Ping has started ...

PING 64.233.167.99 (64.233.167.99): 56 data bytes

64 bytes from 64.233.167.99: icmp_seq=0 ttl=244 time=189.655 ms

64 bytes from 64.233.167.99: icmp_seq=1 ttl=244 time=213.471 ms

64 bytes from 64.233.167.99: icmp_seq=2 ttl=244 time=257.873 ms

64 bytes from 64.233.167.99: icmp_seq=3 ttl=244 time=172.745 ms

64 bytes from 64.233.167.99: icmp_seq=4 ttl=244 time=226.723 ms

64 bytes from 64.233.167.99: icmp_seq=5 ttl=244 time=171.883 ms

64 bytes from 64.233.167.99: icmp_seq=6 ttl=244 time=260.308 ms

64 bytes from 64.233.167.99: icmp_seq=7 ttl=244 time=172.963 ms

64 bytes from 64.233.167.99: icmp_seq=8 ttl=244 time=198.840 ms

64 bytes from 64.233.167.99: icmp_seq=9 ttl=244 time=181.215 ms

--- 64.233.167.99 ping statistics ---

10 packets transmitted, 10 packets received, 0% packet loss

round-trip min/avg/max/stddev = 171.883/204.568/260.308/32.247 ms

If pinging 17.254.3.183 works but pinging Google.com doesn't. You have a bad DNS Server address.

I use Google.

Google provides free dns lookup. Their numbers are:

8.8.8.8

8.8.4.4

BDAqua suggests in a post.

You can use OpenDNS for looking up web addresses.

Put these numbers in Network>TCP/IP>DNS Servers for a try...

208.67.222.222

208.67.220.220

I think they now pretend you need to join to use, but you don't.

https://www.opendns.com/homenetwork/start/device/apple-osx-tiger
(Please note that you do not need to a joint Open DNS to use it.)

http://discussions.apple.com/message.jspa?messageID=5908432#5908432

fyi:

If Tiger has a working ethernet connection and configured to use dhcp, but doesn't find a dhcp server, Tiger will generate these addresses:

ip address: 169.254.193.199

mask: 255.255.255.0

Robert

=======================================================

I suggest that you try pinging Google.com.

Macintosh-HD -> Applications -> Utilities -> Terminal

# press return to run the command.

# settings for you communications port. en0 is the ethenet cable port

ifconfig

# gateway address

netstat -nr | grep default

mac $ ping -c4 google.com

PING google.com (64.233.187.99): 56 data bytes

64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=177.617 ms

64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=251.899 ms

64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=169.291 ms

64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=250.119 ms

--- google.com ping statistics ---

4 packets transmitted, 4 packets received, 0% packet loss

round-trip min/avg/max/stddev = 169.291/212.232/251.899/38.894 ms

mac $ ping -c4 64.233.187.99

PING 64.233.187.99 (64.233.187.99): 56 data bytes

64 bytes from 64.233.187.99: icmp_seq=0 ttl=245 time=176.723 ms

64 bytes from 64.233.187.99: icmp_seq=1 ttl=245 time=247.889 ms

64 bytes from 64.233.187.99: icmp_seq=2 ttl=245 time=176.890 ms

64 bytes from 64.233.187.99: icmp_seq=3 ttl=245 time=244.623 ms

--- 64.233.187.99 ping statistics ---

4 packets transmitted, 4 packets received, 0% packet loss

round-trip min/avg/max/stddev = 176.723/211.531/247.889/34.744 ms

mac $

Analysis: If you cannot ping Goolge.com but you can ping 64.233.187.99, then you need to enter you dns address. For some reason Mac OS X sometimes doesn't set the dns. You can set it manually.

Try pinging your router.

mac $ ping -c4 192.168.1.1

PING 192.168.1.1 (192.168.1.1): 56 data bytes

64 bytes from 192.168.1.1: icmp_seq=0 ttl=255 time=0.958 ms

64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=0.950 ms

64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=0.955 ms

64 bytes from 192.168.1.1: icmp_seq=3 ttl=255 time=0.984 ms

--- 192.168.1.1 ping statistics ---

4 packets transmitted, 4 packets received, 0% packet loss

round-trip min/avg/max/stddev = 0.950/0.962/0.984/0.013 ms

mac $

Try pinging your dns server 8.8.8.8 or 8.8.4.4

apple > system preferences > network

tcp/ip tab and enter address of dns servers

example 162.33.160.100

You will need to use a different number.

Robert