I have been having a problem with vitualmin/wwebmin it was working fine but I had to change IP addresses on a virtual server. After that I could not get webmin to allow login. I have tried restarting webmin but no avail. I had to eventually remove webmin and reinstall this got it working till the next ubuntu update that required a reboot since then the login problem has returned I restarted webmin but no effect. I really would prefer to solve this without reinstalling as it would probably happen again sometime. I have very limited knowlege but the problem seems to relate to ip address and fully qualified domain name. Any suggestions on how to approach this?