Strange Happenings in Who is Online?

[محروم.كوم]

Hello Everyone, Sometimes I notice very strange happenings in Who is Online List of my forum.

Issue 1 :
Several times, I notice guests/spiders which shows "Unknown Location" in Activity column. Screenshot Below.
Attachment 43776

Issue 2:
There is an IP address, When I resolve it. It just shows a simple dot (.) !!??!! Unlike others.
Attachment 43775

Issue 3:
Many times, I've noticed a tons of guests appearing suddenly and most of them have same exact IP addresses.

So considering all above issues, I'm wondering if this is fine or there's something needs to be worry about? Thanks in advance!

Cheers,
Vibhor
Attached Images

• dot_resolve..PNG‎ (1.7 KB)
• unknown_location&#4.PNG‎ (3.1 KB)

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