We have squid proxy to connect through interent, the authentication is done through samba. (All servers are on linux, only client is windows xp where we browse)

Issue is when we try to connect to the internet it will ask for authentication, which is done through samba but the authentication box keeps on appearing every few minutes. It will only connect again when we restart smb service on samba server.

It was working fine till now, with not much of problem but suddenly this thing has aggravated, no recent changes have been made to the server.

Any help will be appreciated.