Eu segui este guia na criação de um servidor VPN Softether em uma instância do Digital Ocean Ubuntu 14.04. Eu instalei o cliente vether Softether e openvpn no meu laptop (ubuntu 14.10).
Os registros do servidor indicam que ambos os clientes podem se conectar OK, mas não consigo fazer ping ou fazer telnet para o servidor. Além disso, quando me conecto com o openvpn, perco toda a internet, exceto o skype.
Com os relatórios netstat -nr do cliente openvpn como a seguir.
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.30.14 128.0.0.0 UG 0 0 0 tun0
0.0.0.0 192.168.4.1 0.0.0.0 UG 0 0 0 eth0
54.158.28.151 192.168.4.1 255.255.255.255 UGH 0 0 0 eth0
128.0.0.0 192.168.30.14 128.0.0.0 UG 0 0 0 tun0
192.168.4.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
192.168.30.14 0.0.0.0 255.255.255.255 UH 0 0 0 tun0
Com o cliente Softether, o netstat -nr relata o seguinte:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.4.1 0.0.0.0 UG 0 0 0 eth0
192.168.4.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
Ping para telnet para 192.168.30.14 vezes.
O cliente ifconfig -a do Softether vpn relata o seguinte.
vpn_markadapter Link encap:Ethernet HWaddr 00:ac:c5:ff:ce:ec
inet6 addr: fe80::2ac:c5ff:feff:ceec/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1620 errors:0 dropped:0 overruns:0 frame:0
TX packets:1234 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:118928 (118.9 KB) TX bytes:104989 (104.9 KB)
cliente openvpn, ifconfig -a:
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:192.168.30.13 P-t-P:192.168.30.14 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:280 errors:0 dropped:0 overruns:0 frame:0
TX packets:534 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:38199 (38.1 KB) TX bytes:60461 (60.4 KB)
Console do OpenVPN:
Thu May 28 19:10:12 2015 WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Thu May 28 19:10:12 2015 Socket Buffers: R=[87380->131072] S=[16384->131072]
Thu May 28 19:10:12 2015 Attempting to establish TCP connection with [AF_INET]128.199.126.151:5555 [nonblock]
Thu May 28 19:10:13 2015 TCP connection established with [AF_INET]128.199.126.151:5555
Thu May 28 19:10:13 2015 TCPv4_CLIENT link local: [undef]
Thu May 28 19:10:13 2015 TCPv4_CLIENT link remote: [AF_INET]128.199.126.151:5555
Thu May 28 19:10:13 2015 TLS: Initial packet from [AF_INET]128.199.126.151:5555, sid=16ccbc28 f3c5eca8
Thu May 28 19:10:13 2015 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Thu May 28 19:10:14 2015 VERIFY OK: depth=0, CN=[128.199.126.151], O=[128.199.126.151], OU=[128.199.126.151], C=US
Thu May 28 19:10:14 2015 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Thu May 28 19:10:14 2015 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Thu May 28 19:10:14 2015 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Thu May 28 19:10:14 2015 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Thu May 28 19:10:14 2015 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA
Thu May 28 19:10:14 2015 [[128.199.126.151]] Peer Connection Initiated with [AF_INET]128.199.126.151:5555
Thu May 28 19:10:16 2015 SENT CONTROL [[128.199.126.151]]: 'PUSH_REQUEST' (status=1)
Thu May 28 19:10:16 2015 PUSH: Received control message: 'PUSH_REPLY,ping 3,ping-restart 10,ifconfig 192.168.30.13 192.168.30.14,dhcp-option DNS 192.168.30.1,route-gateway 192.168.30.14,redirect-gateway def1'
Thu May 28 19:10:16 2015 OPTIONS IMPORT: timers and/or timeouts modified
Thu May 28 19:10:16 2015 OPTIONS IMPORT: --ifconfig/up options modified
Thu May 28 19:10:16 2015 OPTIONS IMPORT: route options modified
Thu May 28 19:10:16 2015 OPTIONS IMPORT: route-related options modified
Thu May 28 19:10:16 2015 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Thu May 28 19:10:16 2015 ROUTE_GATEWAY 192.168.4.1/255.255.252.0 IFACE=eth0 HWADDR=b8:ac:6f:50:18:af
Thu May 28 19:10:16 2015 TUN/TAP device tun0 opened
Thu May 28 19:10:16 2015 TUN/TAP TX queue length set to 100
Thu May 28 19:10:16 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Thu May 28 19:10:16 2015 /sbin/ip link set dev tun0 up mtu 1500
Thu May 28 19:10:16 2015 /sbin/ip addr add dev tun0 local 192.168.30.13 peer 192.168.30.14
Thu May 28 19:10:16 2015 /sbin/ip route add 128.199.126.151/32 via 192.168.4.1
Thu May 28 19:10:16 2015 /sbin/ip route add 0.0.0.0/1 via 192.168.30.14
Thu May 28 19:10:16 2015 /sbin/ip route add 128.0.0.0/1 via 192.168.30.14
Thu May 28 19:10:16 2015 Initialization Sequence Completed
Eu precisava instalar o Softether vpnclient no servidor, depois no vpnserver DhcpEnable e finalmente reiniciar o SSH. DhcpTable me mostrou meu endereço IP conectado.
No meu laptop, eu precisava executar o dhclient no adaptador para obter um endereço IP. Então eu poderia ssh no meu servidor.
Se o cliente for linux, você precisa adicionar o comando "dhclient tunx" no final do script de inicialização do softether. Adicionando o tempo de atraso do sono também é bom para garantir que a vpn já esteja conectada antes de iniciar o comando dhclient.
Sua configuração está bem. Parece que algo bloqueou o tráfego de saída. Não tenho certeza do que é, poderia ser firewall.