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Chaning VPN client IP range on Ubuntu
Posted: Sat Apr 16, 2022 3:11 am
by wahabqurashi
Hi there,
I have installed the Softether VPN server on the Ubuntu-based server in my office. I am able to connect to the VPN service from any remote location using the Softether VPN client application and my client device gets an IP address of 192.168.30.X. I want to change this IP address range to 10.0.X.X. I am not sure how we can change the IP range in the ubuntu server as we don't have a GUI interface for Linux.Thanks
Re: Chaning VPN client IP range on Ubuntu
Posted: Sat Apr 16, 2022 10:20 am
by solo
There are 3 methods to make the change.
#1 GUI from remote Win/Wine - run
vpnsmgr.exe
#2 CLI SE - run ./vpncmd and
Change Virtual DHCP Server Function
#3 CLI Linux...
Code: Select all
systemctl stop vpnserver
cd /usr/local/vpnserver
root@ubuntu:/usr/local/vpnserver# nano vpn_server.config
declare SecureNAT
{
bool Disabled true
bool SaveLog false
declare VirtualDhcpServer
{
string DhcpDnsServerAddress 192.168.30.1
string DhcpDnsServerAddress2 0.0.0.0
string DhcpDomainName $
bool DhcpEnabled true
uint DhcpExpireTimeSpan 7200
string DhcpGatewayAddress 192.168.30.1
string DhcpLeaseIPEnd 192.168.30.200
string DhcpLeaseIPStart 192.168.30.10
string DhcpPushRoutes $
string DhcpSubnetMask 255.255.255.0
}
declare VirtualHost
{
string VirtualHostIp 192.168.30.1
string VirtualHostIpSubnetMask 255.255.255.0
systemctl start vpnserver
Re: Chaning VPN client IP range on Ubuntu
Posted: Sat Apr 16, 2022 5:56 pm
by wahabqurashi
I have tried the last method. I have stopped the VPN server using
#systemctl stop vpnserver
I am able to change all the configs as you have mentioned below:
declare SecureNAT
{
bool Disabled true
bool SaveLog true
declare VirtualDhcpServer
{
string DhcpDnsServerAddress 10.8.0.1
string DhcpDnsServerAddress2 0.0.0.0
string DhcpDomainName $
bool DhcpEnabled true
uint DhcpExpireTimeSpan 7200
string DhcpGatewayAddress 10.8.0.1
string DhcpLeaseIPEnd 10.8.0.254
string DhcpLeaseIPStart 10.8.0.10
string DhcpPushRoutes $
string DhcpSubnetMask 255.255.255.0
}
declare VirtualHost
{
string VirtualHostIp 192.168.30.1
string VirtualHostIpSubnetMask 255.255.255.0
I have restarted the service as well. I am still getting the same 192.168.30.X range. Is there anything incorrect from my side?
Re: Chaning VPN client IP range on Ubuntu
Posted: Sun Apr 17, 2022 1:36 am
by solo
Yes, VirtualHostIp is incorrect. Works for me...
Code: Select all
declare VirtualDhcpServer
{
string DhcpDnsServerAddress 10.8.0.1
string DhcpDnsServerAddress2 0.0.0.0
string DhcpDomainName $
bool DhcpEnabled true
uint DhcpExpireTimeSpan 7200
string DhcpGatewayAddress 10.8.0.1
string DhcpLeaseIPEnd 10.8.0.200
string DhcpLeaseIPStart 10.8.0.10
string DhcpPushRoutes $
string DhcpSubnetMask 255.255.255.0
}
declare VirtualHost
{
string VirtualHostIp 10.8.0.1
string VirtualHostIpSubnetMask 255.255.255.0
on a Win client I get
Code: Select all
netstat -r
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.8.0.1 10.8.0.10 1
0.0.0.0 0.0.0.0 192.168.8.1 192.168.8.101 20
10.8.0.0 255.255.255.0 10.8.0.10 10.8.0.10 1
10.8.0.10 255.255.255.255 127.0.0.1 127.0.0.1 1
10.255.255.255 255.255.255.255 10.8.0.10 10.8.0.10 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
130.158.6.69 255.255.255.255 192.168.8.1 192.168.8.101 20
192.168.8.0 255.255.255.0 192.168.8.101 192.168.8.101 20
192.168.8.101 255.255.255.255 127.0.0.1 127.0.0.1 20
192.168.8.255 255.255.255.255 192.168.8.101 192.168.8.101 20
224.0.0.0 240.0.0.0 10.8.0.10 10.8.0.10 1
224.0.0.0 240.0.0.0 192.168.8.101 192.168.8.101 20
255.255.255.255 255.255.255.255 10.8.0.10 3 1
255.255.255.255 255.255.255.255 10.8.0.10 10007 1
255.255.255.255 255.255.255.255 10.8.0.10 10006 1
255.255.255.255 255.255.255.255 10.8.0.10 10.8.0.10 1
255.255.255.255 255.255.255.255 192.168.8.101 192.168.8.101 1
Default Gateway: 10.8.0.1
Also the client may need to: ipconfig /renew *VPN*
Re: Chaning VPN client IP range on Ubuntu
Posted: Tue Apr 19, 2022 12:39 pm
by wahabqurashi
It is resolved now. Thanks for your help.