Hi, I've been having this problem for a month or so. Noone else in my network can ping me, and if I do I get a Mac address (fe80::180d:31a3 ...) instead of my actual IP. Doing a ping with my IP gets a response, everything seems to work fine until I try to host an application and they can't join. I'm kinda sure the ping issue is related to the fact noone else sees me in the network. I already tried turning the firewall off as well as the antivirus, changed my ip and reset the router to factory defaults. Non of these seemed to work. Anyone have any idea what's going on? Thanks in advance guys.

That doesn't look like a MAC address, more like an IPv6 IP address. Stuart

I assumed it was MAC as I have no idea about ipv6. Anyway, thanks for the information, I'll keep looking for a solution (and with that I think it could be easier). :)

Ping is a poor choice to diag network issues. Taking A/V off is even a worse choice. Taking firewall of is just about as bad. "Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

What this means CoreCryo is in your tcp/ip properties you have two check boxes. One for ipv4 and one for ipv6 [ip version 4 or 6]. Sounds like you only have ipv6 checked. You need to check the ipv4 box.

V4 was checked, I currently have ipv6 disabled. this is what I got when doing a ping: ----------------------------------- C:\Users\Core>ping core Pinging Core [::1] from ::1 with 32 bytes of data: Reply from ::1: time<1ms Reply from ::1: time<1ms Reply from ::1: time<1ms Reply from ::1: time<1ms Ping statistics for ::1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms ----------------------------------- Before disabling ipv6 and Teredo Tunneling Pesudo-Interface I got the number I posted before (fe80::180d:31a3...), I thought if I disabled v6 completely it would go back to v4 as it should be (or at least that's how I used to have my pc). Here's a ipconfig /all result (I saw they asked for it in other boards, maybe it would help): ----------------------------------- Windows IP Configuration Host Name . . . . . . . . . . . . : Core Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Realtek RTL8168C(P)/8111C(P) Family PCI-E GBE NIC Physical Address. . . . . . . . . : 00-22-15-43-CA-54 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 200.40.30.245 200.40.220.245 NetBIOS over Tcpip. . . . . . . . : Enabled Tunnel adapter Local Area Connection* 6: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft ISATAP Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Tunnel adapter Local Area Connection* 7: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . : 02-00-54-55-4E-01 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e50:874:31a3:4178:f360(Prefe rred) Link-local IPv6 Address . . . . . : fe80::874:31a3:4178:f360%11(Preferred) Default Gateway . . . . . . . . . : :: NetBIOS over Tcpip. . . . . . . . : Disabled Tunnel adapter Local Area Connection* 17: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : 6TO4 Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes ----------------------------------- Thanks for all the help.

ping by name means name resolution has to take place. Check your dns server entry for this workstation. It should have a static ip as listed in your ipconfig. What are the results of ping 192.168.1.2 from a different station? What are the results of ping 127.0.0.1 on this station?