我无法通过 sstp 让 VPN 工作。连接在 Windows-VM 中有效，但在 ubuntu 主机上无效。
我不确定我的主机是否正在与另一端通话，或者错误是否完全发生在我这边。
身份验证是通过我配置的证书完成的。我无法使用命令行连接，也无法使用网络管理器 GUI 连接。
我已经安装了以下库：
sstp-client 1.0.12-0ubuntu1
network-manager-sstp 1.2.6-0ubuntu0
libsstp-api-0 1.0.12-0ubuntu1
我可以提供以下配置：
[vpn]
ca-cert=/home/USR123/.ssh/pfx/vpn.pem
domain=xyz
gateway=123.123.123.123
ignore-cert-warn=yes
lcp-echo-failure=5
lcp-echo-interval=30
no-vj-comp=yes
nobsdcomp=yes
nodeflate=yes
password-flags=2
proxy-password-flags=0
refuse-chap=yes
refuse-eap=yes
refuse-pap=yes
require-mppe=yes
service-type=org.freedesktop.NetworkManager.sstp
[ipv4]
dns-search=
method=auto
[ipv6]
addr-gen-mode=stable-privacy
dns-search=
ip6-privacy=0
method=auto
并按照以下带有日志级别调试的输出：
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7359] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent [0x56191bd30020/"sstp"/"vpn"] MODIFY check result YES
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7610] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent returned secrets for request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7615] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x12345bcaa8f0) secrets returned from agent :1.89
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7616] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x12345bcaa8f0) secrets request completed
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7623] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x12345bcaa8f0) new agent secrets processed
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7627] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: asking service if additional secrets are required
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7636] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: service indicated additional secrets required
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7636] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: requesting VPN secrets pass #3
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7640] Secrets requested for connection /org/freedesktop/NetworkManager/Settings/3 (sstp/vpn)
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7640] agent-manager: req[0x7f35d4004870, :1.188/nmcli-connect/1000]: agent allowed for secrets request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7640] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent allowed for secrets request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7641] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x56191bd30020) secrets requested flags 0x5 hints '(none)'
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7643] agent-manager: ([0x56191bd30020/"sstp"/"vpn"]) system settings secrets insufficient, asking agents
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7644] agent-manager: req[0x7f35d4004870, :1.188/nmcli-connect/1000]: agent getting secrets for request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7644] agent-manager: ([0x56191bd30020/"sstp"/"vpn"]) request has system secrets; checking agent :1.188 for MODIFY
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7644] auth: call[681]: CheckAuthorization(org.freedesktop.NetworkManager.settings.modify.own), subject=unix-process[pid=19967, uid=1000, start=395
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7657] auth: call[681]: CheckAuthorization succeeded: (is_authorized=1, is_challenge=0)
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7657] agent-manager: req[0x7f35d4004870, :1.188/nmcli-connect/1000]: agent [0x56191bd30020/"sstp"/"vpn"] MODIFY check result YES
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7675] agent-manager: req[0x7f35d4004870, :1.188/nmcli-connect/1000]: agent returned no secrets for request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7675] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent getting secrets for request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7675] agent-manager: ([0x56191bd30020/"sstp"/"vpn"]) request has system secrets; checking agent :1.89 for MODIFY
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7675] auth: call[682]: CheckAuthorization(org.freedesktop.NetworkManager.settings.modify.own), subject=unix-process[pid=1734, uid=1000, start=7235
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7688] auth: call[682]: CheckAuthorization succeeded: (is_authorized=1, is_challenge=0)
Feb 16 19:11:40 USR123 NetworkManager[981]: <debug> [1550340700.7688] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent [0x56191bd30020/"sstp"/"vpn"] MODIFY check result YES
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0849] agent-manager: req[0x56191bd351b0, :1.89/org.freedesktop.nm-applet/1000]: agent returned secrets for request [0x56191bd30020/"sstp"/"vpn"]
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0858] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x56191bc66400) secrets returned from agent :1.89
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0858] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x56191bc66400) secrets request completed
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0875] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: (vpn:0x56191bc66400) saving new secrets to backing storage
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0974] ++ connection 'get-new-secrets' (0x56191bc69540/NMSimpleConnection/"vpn" < 0x56191bc1bb60/NMSKeyfileConnection/"vpn"):
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0974] ++ vpn [ 0x51234bd7b123 < 0x1234bd1ba55 ]
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0974] ++ vpn.secrets = ((GHashTable*) 0x7f23a4234b10) < ((GHashTable*) 0x51244bd7b111)
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.0984] settings-connection[0x56191bc1bb60,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1]: write: successfully updated (keyfile: update /etc/NetworkManager/s
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.0992] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: asking service if additional secrets are required
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1016] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: service indicated no additional secrets required
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1020] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: Allowing interactive secrets as all agents have that capabilit
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.1029] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: VPN connection: (ConnectInteractive) reply received
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1029] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: VPN connection: falling back to non-interactive connect
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.1043] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: VPN plugin: state changed: starting (3)
Feb 16 19:11:45 USR123 pppd[19985]: Plugin /usr/lib/pppd/2.4.7/nm-sstp-pppd-plugin.so loaded.
Feb 16 19:11:45 USR123 NetworkManager[981]: Plugin /usr/lib/pppd/2.4.7/nm-sstp-pppd-plugin.so loaded.
Feb 16 19:11:45 USR123 pppd[19985]: pppd 2.4.7 started by root, uid 0
Feb 16 19:11:45 USR123 pppd[19985]: Using interface ppp0
Feb 16 19:11:45 USR123 NetworkManager[981]: Using interface ppp0
Feb 16 19:11:45 USR123 NetworkManager[981]: Connect: ppp0 <--> /dev/pts/2
Feb 16 19:11:45 USR123 pppd[19985]: Connect: ppp0 <--> /dev/pts/2
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1100] platform: signal: link added: 9: ppp0 <NOARP,DOWN;pointopoint,multicast,noarp> mtu 1500 arp 512 ppp* not-init addrgenmode eui64 driver ppp
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1101] device[0x56191bd59e50] (ppp0): constructed (NMDevicePpp)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1101] device[0x56191bd59e50] (ppp0): start setup of NMDevicePpp, kernel ifindex 9
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1102] platform-linux: error reading net:/sys/class/net/ppp0/phys_port_id: error reading 4096 bytes from file descriptor: Vorgang wird nicht unters
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1102] platform-linux: sysctl: reading 'net:/sys/class/net/ppp0/dev_id': '0x0'
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1103] platform-linux: error reading net:/sys/class/net/ppp0/device/sriov_totalvfs: Failed to open file "device/sriov_totalvfs" with openat: Datei
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1103] platform-linux: do-request-link: 9
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1103] device[0x56191bd59e50] (ppp0): unmanaged: flags set to [platform-init,external-down=0x810/0x810/unmanaged/unrealized], set-unmanaged [extern
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1103] device[0x56191bd59e50] (ppp0): unmanaged: flags set to [platform-init,external-down,!loopback=0x810/0x818/unmanaged/unrealized], set-managed
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1103] device[0x56191bd59e50] (ppp0): unmanaged: flags set to [platform-init,external-down,!sleeping,!loopback=0x810/0x819/unmanaged/unrealized], s
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.1108] manager: (ppp0): new Ppp device (/org/freedesktop/NetworkManager/Devices/9)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1213] platform-linux: UDEV event: action 'add' subsys 'net' device 'ppp0' (9); seqnum=3988
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1214] platform: signal: link changed: 9: ppp0 <NOARP,DOWN;pointopoint,multicast,noarp> mtu 1500 arp 512 ppp* init addrgenmode eui64 driver ppp rx
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1214] device[0x56191bd59e50] (ppp0): queued link change for ifindex 9
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.1215] devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Feb 16 19:11:45 USR123 NetworkManager[981]: <info> [1550340705.1215] device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1216] device[0x56191bd59e50] (ppp0): unmanaged: flags set to [platform-init,external-down,!sleeping,!loopback,!user-settings=0x810/0x859/unmanaged
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1216] device[0x56191bd59e50] (ppp0): unmanaged: flags set to [external-down,!sleeping,!loopback,!platform-init,!user-settings=0x800/0x859/manageab
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1218] device[0x56191bd59e50] (ppp0): ip4-config: update (commit=0, new-config=0x56191bce7090)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1221] device[0x56191bd59e50] (ppp0): ip4-config: set IP4Config instance (/org/freedesktop/NetworkManager/IP4Config/12)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1221] dns-mgr: (device_ip4_config_changed): queueing DNS updates (1)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1221] dns-mgr: (device_ip4_config_changed): DNS configuration did not change
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1221] dns-mgr: (device_ip4_config_changed): no DNS changes to commit (0)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1222] device[0x56191bd59e50] (ppp0): ip6-config: update (commit=0, new-config=0x56191bcf0b80)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1225] device[0x56191bd59e50] (ppp0): ip6-config: set IP6Config instance (/org/freedesktop/NetworkManager/IP6Config/12)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1225] dns-mgr: (device_ip6_config_changed): queueing DNS updates (1)
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1225] dns-mgr: (device_ip6_config_changed): DNS configuration did not change
Feb 16 19:11:45 USR123 NetworkManager[981]: <debug> [1550340705.1225] dns-mgr: (device_ip6_config_changed): no DNS changes to commit (0)
Feb 16 19:11:46 USR123 sstpc[19990]: Connection was aborted, Reason was not known
Feb 16 19:11:46 USR123 pppd[19985]: Modem hangup
Feb 16 19:11:46 USR123 NetworkManager[981]: Modem hangup
Feb 16 19:11:46 USR123 NetworkManager[981]: Connection terminated.
Feb 16 19:11:46 USR123 pppd[19985]: Connection terminated.
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3168] platform: signal: link removed: 9: ppp0 <NOARP,DOWN;pointopoint,multicast,noarp> mtu 1500 arp 512 ppp* init addrgenmode eui64 driver ppp rx:
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3172] platform: signal: address 4 changed: 192.168.0.5/24 lft 600797sec pref 600797sec lifetime 39568-35566[604799,604799] dev 2 flags noprefixrou
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3172] device[0x56191bcd5460] (enp0s25): queued IP4 config change
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3174] platform: signal: address 6 changed: 2a02:810b:c240:122c:59a4:3f8d:cf8b:93a/64 lft 4717sec pref 2017sec lifetime 39568-39530[2055,4755] dev
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3175] device[0x56191bcd5460] (enp0s25): queued IP6 config change
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3176] platform: signal: address 6 changed: 2a02:810b:c240:122c:2a16:a257:5791:ee17/64 lft 4717sec pref 2017sec lifetime 39568-39530[2055,4755] dev
Feb 16 19:11:46 USR123 NetworkManager[981]: <warn> [1550340706.3181] vpn-connection[0x56191bd724c0,1a5b2d23-d1a4-4a7e-843b-3ec123c4a6a1,"sstp",0]: VPN plugin: failed: connect-failed (1)
Feb 16 19:11:46 USR123 NetworkManager[981]: <debug> [1550340706.3182] device[0x56191bd59e50] (ppp0): unrealize (ifindex 9)