List of links to IP67 and XLR type environmentally hardend RJ45 Connectors.
Here are a couple of IP67 (water proof) RJ45 connectors.
rjlnxx.com amphenol.com sixnetio.com (distributor)
Here are some other comanies that make XLR type RJ45 connectors.
neutrik.com (Goto Products -> RJ45 Data Connectors -> Ethercon Series) markertek.com (distributor)