Odd Addresses

We have from time to time phantom "accesses" from odd addresses such as yesterday: http://161/1.035 These accesses and addresses do not show up in the log files but are listed in summaries of accesses produced by Analog on our dedicated server. When we run Analog of what should be the same log file on our machine the addresses do not appear. The odd addresses change, none repeat, and do not appear every day. Got any ideas what such entries indicate? Machine camouflage, snoops by spooks, spoofs, debris, taunts? We do see in the logfiles our ISP's regular checks of our machine for operability, showing log ins from 127.0.0.0, but the odd addresses not at all.