Here are a couple of IP67 (water proof) RJ45 connectors.

[http://www.rjlnxx.com/PDF/PhysMedia.pdf rjlnxx.com] [http://www.amphenol.com/index.cfm?fuseaction=news.dspFull&itemID=8 amphenol.com] [http://www.sixnetio.com/html_files/products_and_groups/switch_ip67_bulkhead.htm sixnetio.com] (Distributor)

Here are some other comanies that make XLR type RJ45 connectors.

[http://www.neutrik.com/content/Products/products_group.asp?id=204_170351 neutrik.com] [http://www.markertek.com/MTStore/product.CFM?BaseItem=NE8MC markertek.com] (distributor)