I have installed PHPpgAdmin in ubuntu.
If i use http://localhost/phppgadmin then it works if i am at the server
But if i use from LAN
Http://ip -- works Http://ip/phppgadmin-- don't work
It says permission denied
Check the configuration of the site, due to the nature of the script, I would be 99% sure it comes shipped with some sort of IP based restrictions.
Nate gives usefull advice, but I don't think that'll help you. As the local IP's usually range inside 192.168.*.*, which is already inside the range 127.0.0.0/255.0.0.0.
My advice to you, is to temporarily change the line
Inside /ect/phppgadmin/apache.conf And see if it changes anything (please not that I am not sure of this path. I am a Windows user myself.). It would be wise to edit your question with the results of this, so you can be helped further.
Also, have you tried to reach it from a different computer/device in your network, or just one?
For Ubuntu, edit the file
Add an additional line that allows access from your subnet. Then make Apache re-load its configuration.
Simply add an entry for your subnet (here: all machines with IPs in 192.168.0.XXX) in the given allow from line