unknown ip address on my network when vpn server running

[steve.iannuzzo]

I have a win7 pro system running Softether VPN 4.0 (Ver 4.19, build 9599)

When I do an arp -a from any of my computers on the network (my network 192.168.1/24) I see an Ip address of 172.31.251.10 in my arp table.

If I shutdown the vpn server this ip is no longer being broadcasted.

Any ideas??

[shurick930]

> When I do an arp -a from any of my computers on the network (my network
> 192.168.1/24) I see an Ip address of 172.31.251.10 in my arp table.
>
> If I shutdown the vpn server this ip is no longer being broadcasted.

I have same issue in all networks which have Softether VPN server working...
IPs may differ but all of them from 172.31 subnet
if I try to traceroute this addresses I see second hop 172.16.0.1.
I have no ideas about that.

[kalemeister]

That ip address is in the range of addresses reserved for private LAN use. That's as much as I can say.
If it still worries you, you could get the source code and search for that address. If you don't know programming you could post it here and I'll tell you what it's doing maybe.

[thisjun]

Refer the manual.
http://www.softether.org/4-docs/1-manua ... ll_Packets

[quattrolinux]

thisjun wrote:
> Refer the manual.
>
> http://www.softether.org/4-docs/1-manua ... ll_Packets
Manual says
"The sending IP address for this ARP request packet is "172.31.0.0/16" and the destination IP address is the IP address subject to the survey."
I have nothing against the survey but my internal network is 172.31.0.0/16 and survey interferes with normal operations. Could 172.31.0.0/16 be changed to some other value?

[thisjun]

Please modify the code.

https://github.com/SoftEtherVPN/SoftEth ... edar/Hub.c
Function: GenHubIpAddress