我刚刚更新到 Mac OS X Yosemite，问题是流量无法通过 PPTP 连接路由到 OpenVPN 或 Kerio 连接。Mavericks OS X 没有问题。我也可以连接并正确使用其他地方的 OpenVPN，而不需要先连接到 PPTP VPN。我以为问题出在路由表上。所以，这是我连接netstat -rn到 PPTP 和 Kerio 时的结果：
Internet:
Destination Gateway Flags Refs Use Netif Expire
0/1 10.253.24.1 UGSc 0 0 kvnet0
default link#12 UCS 7 0 ppp0
default 192.168.12.1 UGScI 3 0 en0
default 192.168.89.1 UGScI 2 0 en1
default link#10 UCSI 13 0 kvnet0
1.1.1.52 172.17.21.183 UH 0 0 ppp0
1.1.1.55 192.168.12.1 UGHS 1 703 en0
2.16.100.43 44:45:53:53:23:0 UHLWIi 1 3 kvnet0 1183
8.8.4.4 44:45:53:53:23:0 UHLWIi 1 7 kvnet0 1188
8.8.8.8 44:45:53:53:23:0 UHLWI 0 8 kvnet0 1186
10.253.24/21 link#10 UCS 3 0 kvnet0
10.253.24.1 44:45:53:53:23:0 UHLWIir 5 0 kvnet0 1185
10.253.31.255 link#10 UHLWbI 0 1 kvnet0
17.110.226.143 44:45:53:53:23:0 UHLWIi 1 1 kvnet0 1188
17.158.52.47 44:45:53:53:23:0 UHLWIi 1 2 kvnet0 1186
17.172.238.205 44:45:53:53:23:0 UHLWIi 1 2 kvnet0 1188
17.253.6.243 44:45:53:53:23:0 UHLWIi 1 1 kvnet0 1184
31.13.66.1 44:45:53:53:23:0 UHLWIi 3 4 kvnet0 1187
54.93.38.57 44:45:53:53:23:0 UHLWIi 1 3 kvnet0 1183
54.197.253.158 44:45:53:53:23:0 UHLWIi 1 1 kvnet0 1192
74.125.71.109 44:45:53:53:23:0 UHLWI 0 3 kvnet0 1186
74.125.133.108 44:45:53:53:23:0 UHLWIi 1 8 kvnet0 1185
74.125.133.109 44:45:53:53:23:0 UHLWIi 1 8 kvnet0 1185
以下是我在未连接到 pppt 连接并使用 kerio 时的 netstat 输出：
Internet:
Destination Gateway Flags Refs Use Netif Expire
0/1 10.253.24.1 UGSc 0 0 kvnet0
default 192.168.12.1 UGSc 10 0 en0
default 192.168.89.1 UGScI 1 0 en1
default link#10 UCSI 6 0 kvnet0
a2-16-100-43.deplo 44:45:53:53:21:0 UHLWIi 1 13 kvnet0 1200
google-public-dns- 44:45:53:53:21:0 UHLWIi 2 6 kvnet0 1195
10.253.24/21 link#10 UCS 1 0 kvnet0
10.253.24.1 link#10 UHLWIir 4 0 kvnet0
time.apple.com 44:45:53:53:21:0 UHLWIi 1 1 kvnet0 1197
edge-star-shv-01-d 44:45:53:53:21:0 UHLWIi 1 22 kvnet0 1195
hosted-by.leaseweb 192.168.12.1 UGHS 2 175 en0
74.125.71.108 44:45:53:53:21:0 UHLWIi 3 65 kvnet0 1196
74.125.71.109 44:45:53:53:21:0 UHLWI 0 21 kvnet0 1194
127 localhost UCS 0 0 lo0
localhost localhost UH 12 2735894 lo0
128.0/1 10.253.24.1 UGSc 2 0 kvnet0
169.254 link#4 UCS 0 0 en0
169.254 link#5 UCSI 0 0 en1
192.168.12 link#4 UCS 1 0 en0
192.168.12.1/32 link#4 UCS 1 0 en0
192.168.12.1 0:7:e9:e:45:a6 UHLWIir 3 105 en0 747
192.168.12.157/32 link#4 UCS 0 0 en0
192.168.12.255 ff:ff:ff:ff:ff:ff UHLWbI 0 8 en0
192.168.89 link#5 UCS 6 0 en1
192.168.89.1/32 link#5 UCS 1 0 en1
192.168.89.1 a4:18:75:40:42:43 UHLWIir 3 303 en1 1182
192.168.89.12 0:16:e6:4c:99:7d UHLWI 0 18 en1 872
192.168.89.31 8:0:27:10:79:9a UHLWI 0 0 en1 1108
192.168.89.38 b8:88:e3:a4:2a:f2 UHLWIi 1 11 en1 1045
192.168.89.61/32 link#5 UCS 1 0 en1
192.168.89.61 e4:ce:8f:4:a7:d2 UHLWIi 1 2 lo0
192.168.89.64 90:a4:de:89:2:46 UHLWIi 1 13 en1 765
192.168.89.107 0:80:c8:f7:79:a4 UHLWI 0 18 en1 867
192.168.89.255 ff:ff:ff:ff:ff:ff UHLWbI 0 8 en1