Hello!

I have the same issue (I guess ArmA 2 and 3 is using the same method to do this). Looks like the client is using ICMP to "obtain" the ping value when it is started as admin.

22:47:03.866071 IP 83.xxx.xx.xxx > 89.160.xx.xx: ICMP echo request, id 3368, seq 39430, length 14
22:47:03.866140 IP 89.160.xx.xx > 83.xxx.xx.xxx: ICMP echo reply, id 3368, seq 39430, length 14

(Well, it sends the request to my NAT since I don't redirect the ICMP traffic, but yeah, that doesn't matter).

If the client isn't started as admin, I don't see any traffic at all directly from the client that is trying to retrieve the ping from my server. Guess it goes through some other servers?

I have searched in many topics but haven't found a solution yet. Some people say "forgot it" if you are behind a NAT (in my case, a debian box), but that doesn't sound like a solution. I know we are not alone.

Do we know how the client measures the ping value when it doesn't run as admin? I can't see any specific traffic that happens when people are refreshing the server in the server browser. I can see that my server talks with a gamespy and a Valve-server sometimes, which is a UDP-packet in both directions. But not more than that.

If we knew how it does it, maybe we can find out what is going wrong. By the way, the server lists correctly if you watch the gamespy server list here:
http://tools.poweredbygamespy.com/masterserver/index.aspx?gamename=arma3pc
Guess the "ICMPip" is what the client is using when running steam as admin?

I tried to filter on other servers on that list behind NAT (with a local IP set) and i receive the same thing.