My apologies for posting a question that's not exactly Koha-related, though could be. I'm hoping that someone here can explain in a way that a simple medical librarian and part-time Koha geek can understand, or point me to a source that can. Yes, I checked the man page. What I want to do us use UFW (Uncomplicated Firewall) on Ubuntu to allow access to only permitted IP addresses. I can add one IP address without a problem: sudo ufw allow from 192.168.1.115 to any port 80 I think I know how to add a range consisting of anything beginning with 192.168.1.*: sudo ufw allow from 192.168.1.0/24 to any port 80 (Please correct me if I'm wrong.) What I need to do is allow access from the range 192.168.*.* or something like this 192.168.22-65.* or 192.138.187-189.* Any ideas or sources of information? Thanks, --Fred Fred King, MSLS, AHIP Medical Librarian, MedStar Washington Hospital Center fred.king@medstar.net<mailto:fred.king@medstar.net> 202-877-6670 ORCID 0000-0001-5266-0279 MedStar Authors Catalog: http://medstarauthors.org I was singing the blues when I was six. Kind of sad, eh? --Harry Dean Staunton ---------------------------------------------------------------------- MedStar Health is a not-for-profit, integrated healthcare delivery system, the largest in Maryland and the Washington, D.C., region. Nationally recognized for clinical quality in heart, orthopaedics, cancer and GI. IMPORTANT: This e-mail (including any attachments) may contain information that is private, confidential, or protected by attorney-client or other privilege. If you received this e-mail in error, please delete it from your system without copying it and notify sender by reply e-mail, so that our records can be corrected... Thank you. Help conserve valuable resources - only print this email if necessary.