我刚刚使用以下configuration安装OpenVPN服务器：
daemon server-bridge push "route 0.0.0.0 255.255.255.255 net_gateway" proto udp port 1194 dev tap21 comp-lzo adaptive keepalive 15 60 verb 3 plugin /usr/lib/openvpn-plugin-auth-pam.so openvpn client-cert-not-required username-as-common-name duplicate-cn ca ca.crt dh dh.pem cert server.crt key server.key status-version 2 status status 当我连接到客户端时：
client dev tap proto udp remote <remote IP> 1194 float comp-lzo adaptive keepalive 15 60 auth-user-pass ns-cert-type server resolv-retry infinite nobind
连接后，当我ping 192.168.3.12到内部networking，我有非常不稳定的延迟，如下所示：
64 bytes from 192.168.3.12: icmp_seq=239 ttl=64 time=730 ms 64 bytes from 192.168.3.12: icmp_seq=240 ttl=64 time=950 ms 64 bytes from 192.168.3.12: icmp_seq=241 ttl=64 time=290 ms 64 bytes from 192.168.3.12: icmp_seq=242 ttl=64 time=236 ms 64 bytes from 192.168.3.12: icmp_seq=243 ttl=64 time=239 ms 64 bytes from 192.168.3.12: icmp_seq=244 ttl=64 time=41.1 ms 64 bytes from 192.168.3.12: icmp_seq=245 ttl=64 time=1585 ms 64 bytes from 192.168.3.12: icmp_seq=246 ttl=64 time=1804 ms 64 bytes from 192.168.3.12: icmp_seq=247 ttl=64 time=1087 ms 64 bytes from 192.168.3.12: icmp_seq=248 ttl=64 time=483 ms 64 bytes from 192.168.3.12: icmp_seq=249 ttl=64 time=864 ms 64 bytes from 192.168.3.12: icmp_seq=250 ttl=64 time=1614 ms 64 bytes from 192.168.3.12: icmp_seq=251 ttl=64 time=1173 ms 64 bytes from 192.168.3.12: icmp_seq=252 ttl=64 time=837 ms 64 bytes from 192.168.3.12: icmp_seq=253 ttl=64 time=834 ms 64 bytes from 192.168.3.12: icmp_seq=254 ttl=64 time=516 ms 64 bytes from 192.168.3.12: icmp_seq=255 ttl=64 time=235 ms 64 bytes from 192.168.3.12: icmp_seq=256 ttl=64 time=94.1 ms 64 bytes from 192.168.3.12: icmp_seq=257 ttl=64 time=573 ms 64 bytes from 192.168.3.12: icmp_seq=258 ttl=64 time=619 ms 64 bytes from 192.168.3.12: icmp_seq=259 ttl=64 time=842 ms 64 bytes from 192.168.3.12: icmp_seq=260 ttl=64 time=943 ms 64 bytes from 192.168.3.12: icmp_seq=261 ttl=64 time=1144 ms 64 bytes from 192.168.3.12: icmp_seq=262 ttl=64 time=711 ms 64 bytes from 192.168.3.12: icmp_seq=263 ttl=64 time=450 ms 64 bytes from 192.168.3.12: icmp_seq=264 ttl=64 time=182 ms 64 bytes from 192.168.3.12: icmp_seq=265 ttl=64 time=314 ms 64 bytes from 192.168.3.12: icmp_seq=266 ttl=64 time=125 ms 64 bytes from 192.168.3.12: icmp_seq=267 ttl=64 time=1519 ms 64 bytes from 192.168.3.12: icmp_seq=268 ttl=64 time=899 ms 64 bytes from 192.168.3.12: icmp_seq=269 ttl=64 time=818 ms 64 bytes from 192.168.3.12: icmp_seq=270 ttl=64 time=991 ms 64 bytes from 192.168.3.12: icmp_seq=271 ttl=64 time=811 ms 64 bytes from 192.168.3.12: icmp_seq=272 ttl=64 time=1082 ms 64 bytes from 192.168.3.12: icmp_seq=273 ttl=64 time=647 ms 64 bytes from 192.168.3.12: icmp_seq=274 ttl=64 time=204 ms 64 bytes from 192.168.3.12: icmp_seq=275 ttl=64 time=361 ms 64 bytes from 192.168.3.12: icmp_seq=276 ttl=64 time=193 ms 64 bytes from 192.168.3.12: icmp_seq=277 ttl=64 time=93.8 ms 64 bytes from 192.168.3.12: icmp_seq=278 ttl=64 time=682 ms 64 bytes from 192.168.3.12: icmp_seq=279 ttl=64 time=1089 ms 64 bytes from 192.168.3.12: icmp_seq=280 ttl=64 time=1212 ms 64 bytes from 192.168.3.12: icmp_seq=281 ttl=64 time=807 ms 64 bytes from 192.168.3.12: icmp_seq=282 ttl=64 time=1191 ms 64 bytes from 192.168.3.12: icmp_seq=284 ttl=64 time=143 ms 64 bytes from 192.168.3.12: icmp_seq=283 ttl=64 time=1523 ms 64 bytes from 192.168.3.12: icmp_seq=285 ttl=64 time=283 ms 64 bytes from 192.168.3.12: icmp_seq=286 ttl=64 time=342 ms 64 bytes from 192.168.3.12: icmp_seq=287 ttl=64 time=1501 ms 64 bytes from 192.168.3.12: icmp_seq=288 ttl=64 time=1181 ms 64 bytes from 192.168.3.12: icmp_seq=289 ttl=64 time=1234 ms 64 bytes from 192.168.3.12: icmp_seq=290 ttl=64 time=940 ms 64 bytes from 192.168.3.12: icmp_seq=291 ttl=64 time=1172 ms 64 bytes from 192.168.3.12: icmp_seq=292 ttl=64 time=1378 ms 64 bytes from 192.168.3.12: icmp_seq=294 ttl=64 time=308 ms 64 bytes from 192.168.3.12: icmp_seq=295 ttl=64 time=456 ms 64 bytes from 192.168.3.12: icmp_seq=293 ttl=64 time=2710 ms 64 bytes from 192.168.3.12: icmp_seq=296 ttl=64 time=1398 ms 64 bytes from 192.168.3.12: icmp_seq=297 ttl=64 time=571 ms 64 bytes from 192.168.3.12: icmp_seq=298 ttl=64 time=864 ms 64 bytes from 192.168.3.12: icmp_seq=299 ttl=64 time=601 ms 64 bytes from 192.168.3.12: icmp_seq=300 ttl=64 time=1515 ms 64 bytes from 192.168.3.12: icmp_seq=301 ttl=64 time=1181 ms 64 bytes from 192.168.3.12: icmp_seq=302 ttl=64 time=1451 ms 64 bytes from 192.168.3.12: icmp_seq=304 ttl=64 time=268 ms 64 bytes from 192.168.3.12: icmp_seq=305 ttl=64 time=479 ms 64 bytes from 192.168.3.12: icmp_seq=306 ttl=64 time=229 ms 64 bytes from 192.168.3.12: icmp_seq=307 ttl=64 time=10.0 ms 64 bytes from 192.168.3.12: icmp_seq=308 ttl=64 time=355 ms 64 bytes from 192.168.3.12: icmp_seq=309 ttl=64 time=175 ms 64 bytes from 192.168.3.12: icmp_seq=310 ttl=64 time=214 ms 64 bytes from 192.168.3.12: icmp_seq=311 ttl=64 time=53.4 ms 64 bytes from 192.168.3.12: icmp_seq=312 ttl=64 time=748 ms 64 bytes from 192.168.3.12: icmp_seq=313 ttl=64 time=2025 ms 64 bytes from 192.168.3.12: icmp_seq=314 ttl=64 time=1581 ms 64 bytes from 192.168.3.12: icmp_seq=315 ttl=64 time=1668 ms 64 bytes from 192.168.3.12: icmp_seq=316 ttl=64 time=1143 ms 64 bytes from 192.168.3.12: icmp_seq=317 ttl=64 time=723 ms 64 bytes from 192.168.3.12: icmp_seq=318 ttl=64 time=673 ms 64 bytes from 192.168.3.12: icmp_seq=319 ttl=64 time=932 ms 64 bytes from 192.168.3.12: icmp_seq=320 ttl=64 time=1152 ms 64 bytes from 192.168.3.12: icmp_seq=321 ttl=64 time=1355 ms 64 bytes from 192.168.3.12: icmp_seq=322 ttl=64 time=1025 ms 64 bytes from 192.168.3.12: icmp_seq=323 ttl=64 time=993 ms 64 bytes from 192.168.3.12: icmp_seq=324 ttl=64 time=69.7 ms 64 bytes from 192.168.3.12: icmp_seq=325 ttl=64 time=73.8 ms 64 bytes from 192.168.3.12: icmp_seq=326 ttl=64 time=1140 ms 64 bytes from 192.168.3.12: icmp_seq=327 ttl=64 time=595 ms
我有超过500毫秒的延迟40毫秒的链接ping。 我错过了一些重要的设置，还是OpenVPN的自然限制？
在两台机器上，我都在Linux上使用OpenVPN。 客户端内核3.13.0与OpenVPN 2.3.2 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [eurephia] [MH] [IPv6]和服务器内核2.6.22.19与OpenVPN 2.3.2 mipsel-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [eurephia] [MH] [IPv6]
事实certificate，这与OpenVPN完全无关，并且公布的OpenVPNconfiguration不是怪罪。
在我的情况下，解决scheme是从内核/ IP堆栈中禁用行为不当的QoS模块。
之后，我的OpenVPN中的ping在没有OpenVPN的ping 100ms的链接上是150ms。