[ozrich]

Hi Guys,

I'm using the Connect Announce (cannounce) plugin here https://forums.alliedmods.net/showthread.php?t=77306

From what I can see (I'm new to sourcemod coding) it uses geoipcity and geoip. It also utililses the function below, which I believe is the main part.

I've also attached the full code here https://pastebin.com/6DePkiuL

For at least one person in my server, it shows they're from UK but is actually in Australia. They're not using a VPN. Any help would be appreciated!

PHP Code:

bool:IsLanIP( String:src[16] )
{
    decl String:ip4[4][4];
    new ipnum;

    if(ExplodeString(src, ".", ip4, 4, 4) == 4)
    {
        ipnum = StringToInt(ip4[0])*65536 + StringToInt(ip4[1])*256 + StringToInt(ip4[2]);
        
        if((ipnum >= 655360 && ipnum < 655360+65535) || (ipnum >= 11276288 && ipnum < 11276288+4095) || (ipnum >= 12625920 && ipnum < 12625920+255))
        {
            return true;
        }
    }

    return false;
} 


[DarkDeviL]

Originally Posted by ozrich For at least one person in my server, it shows they're from UK but is actually in Australia. They're not using a VPN. Any help would be appreciated!

MaxMind, who are very kind to provide a free "Lite" database has recently discontinued the format with the typical "GeoIP.dat" file, so as per January 2, 2019 you will no longer see any updates in the GeoIP database there, read more here.

An issue (GeoIP Legacy Discontinuation), as well as a pull request (Add support for Maxmind GeoIP2 database files) already exist, which will hopefully make SourceMod support the newer GeoIP2 format in the future.

The incorrect entries are more likely to be due to an old and non-up-to-date GeoIP.dat file, and not necessarily related to plugin itself nor the IsLanIP function or any other functions in the plugin.

I am afraid you will have to wait until those things are merged, and then once it's done, update your SourceMod.


And exactly as you mentioned with your example, you should also notice that there are no guarantee for accurate results with GeoIP:

According to MaxMind's own tests, their GeoIP2 accuracy for Australia 15%, and for United Kingdom 58% accuracy in regards to mapping an IP address to an exact city. You will never find anything that is 100% accurate.

[ozrich]

DarkDevil, thank you very much! So much useful info.

I might see if I can try the plugin with geolite2 possibly with ASN or just ignore it. It's so minimal it's hardly worth it. In the end, if big issue I could always remove the Country.

This helps once again, thank you very much!