| Title | 
                
                    Test
                    Find
                    
                    IPv4, udp/norm protocol with port
                 | 
            
            
                | Expression | 
                ^(udp|norm)://(?:(?:25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)(?(?=\.?\d)\.)){4}:\d{1,6}$  | 
            
            
                | Description | 
                Based on ip regex listed in source. Expanded to require udp:// or norm:// protocol at the start and :12345 port number at the end (1-5 digits).
Written to answer a forum question.
Current limitations - only allows lowercase protocol names and doesn't block ports that start with 0.  | 
            
            
                | Matches | 
                norm://125.24.65.11:80  |  udp://125.24.65.11:80  | 
            
            
                | Non-Matches | 
                125.24.65.11:80  |  norm://125.24.65.11  |  www.NotAnIp.com  | 
            
            
                | Author | 
                
                    Rating:
                        
Not yet rated.
                    Matthew Harris
                 | 
            
            
                | Source | 
                http://regexlib.com/REDetails.aspx?regexp_id=547 | 
            
            
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