我最近搬到了另一家公司。我必须格式化我的计算机，所以我决定测试 Debian 11。但现在我遇到了一些 VPN 问题。我无法连接到任何仅在 VPN 下可用的网站。他们使用 SonicWall NetExtender。我有一些日志，但它没有提供任何有关正在发生的事情的线索......
04/20/2022 20:25:55.411 [connect info 14505] User: <username>
04/20/2022 20:25:55.411 [connect info 14505] Domain: <domain>
04/20/2022 20:25:55.411 [connect info 14505] Server: <server>
04/20/2022 20:25:55.457 [general notice 14505] Connecting to <server>...
04/20/2022 20:25:55.554 [general notice 14505] Connected.
04/20/2022 20:25:55.554 [general notice 14505] Logging in...
04/20/2022 20:25:55.645 [general notice 14505] Login successful.
04/20/2022 20:25:55.806 [general error 14505] Version header not found
04/20/2022 20:25:55.806 [epc info 14505] Server don't support EPC check. Just pass EPC check
04/20/2022 20:25:55.806 [general warn 14505] WireGuard is not capable, root permission is required.
04/20/2022 20:25:55.907 [connect notice 14505] Try to connect with SSLVPN...
04/20/2022 20:25:56.160 [general notice 14505] SSL Connection is ready
04/20/2022 20:25:57.166 [general info 14505] Using new PPP frame encoding mechanism
04/20/2022 20:25:57.167 [general info 14505] Using PPP async mode (chosen by server)
04/20/2022 20:25:57.167 [general info 14505] Connecting tunnel...
04/20/2022 20:26:00.282 [connect info 16154] PPP interface up
04/20/2022 20:26:01.282 [dns notice 16154] Setting up DNS
04/20/2022 20:26:01.296 [general info 16154] Setting up DNS suffixes
04/20/2022 20:26:01.301 [general info 16172] Monitoring processes: nx=14505, pppd=16132
04/20/2022 20:26:01.301 [dns info 16172] Monitoring nameserver: <ip>
04/20/2022 20:26:01.301 [dns info 16172] Monitoring nameserver: <ip>
04/20/2022 20:26:01.301 [dns info 16172] Monitoring DNS suffix: <dns>
04/20/2022 20:26:01.301 [dns info 16172] Monitoring DNS suffix: <dns>
04/20/2022 20:26:02.262 [general info 14505] Client IP Address: <ip>
04/20/2022 20:26:02.262 [general info 14505] You now have access to the following 25 remote networks:
04/20/2022 20:26:02.262 [general info 14505] [redacted information]
04/20/2022 20:26:02.264 [general notice 14505] NetExtender connected successfully.
04/20/2022 20:26:02.412 [general info 14505] Saving profiles/preferences...
04/20/2022 20:26:02.412 [general info 14505] Done saving profiles/preferences
显然我已连接，但无法访问任何依赖 VPN 的网站。
编辑：
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# ip route
default via <my ip> dev wlp4s0 proto dhcp metric 600
<vpn ip 1>/16 via <client vpn ip> dev ppp0
<vpn ip 2> via <client vpn ip> dev ppp0
<vpn ip 3> via <client vpn ip> dev ppp0
<vpn ip 4> via <client vpn ip> dev ppp0
<vpn ip 5> via <client vpn ip> dev ppp0
<vpn ip 6> via <client vpn ip> dev ppp0
<vpn ip 7> via <client vpn ip> dev ppp0
<vpn ip 8> via <client vpn ip> dev ppp0
<vpn ip 9> via <client vpn ip> dev ppp0
<vpn ip 10>/16 via <client vpn ip> dev ppp0
<vpn ip 11>/16 via <client vpn ip> dev ppp0
<vpn ip 12>/16 dev wlp4s0 scope link metric 1000
<vpn ip 12>/12 via <client vpn ip> dev ppp0
<vpn ip 14>/16 dev docker0 proto kernel scope link src <ip 1> linkdown
<vpn ip 15> via <my ip> dev wlp4s0
<vpn ip 16> via <client vpn ip> dev ppp0
<vpn ip 17> dev ppp0 proto kernel scope link src <client vpn ip>
<ip 2>/24 dev wlp4s0 proto kernel scope link src <ip 3> metric 600
<my ip> dev wlp4s0 scope link
<vpn ip 18>/24 via <client vpn ip> dev ppp0
<vpn ip 19>/22 via <client vpn ip> dev ppp0
<vpn ip 20>/23 via <client vpn ip> dev ppp0
<vpn ip 21>/23 via <client vpn ip> dev ppp0
<vpn ip 22>/22 via <client vpn ip> dev ppp0
<vpn ip 23>/24 via <client vpn ip> dev ppp0
<vpn ip 24>/23 via <client vpn ip> dev ppp0
<vpn ip 25>/23 via <client vpn ip> dev ppp0
<vpn ip 26>/24 via <client vpn ip> dev ppp0
<vpn ip 27> via <client vpn ip> dev ppp0
<vpn ip 28> via <client vpn ip> dev ppp0
# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
link/ether 7c:8a:e1:d8:d2:89 brd ff:ff:ff:ff:ff:ff
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
link/ether 5c:cd:5b:52:8e:ec brd ff:ff:ff:ff:ff:ff
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:16:bf:bb:e8 brd ff:ff:ff:ff:ff:ff
8: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1280 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 3
link/ppp
# ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 7c:8a:e1:d8:d2:89 brd ff:ff:ff:ff:ff:ff
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 5c:cd:5b:52:8e:ec brd ff:ff:ff:ff:ff:ff
inet <ip 1>/24 brd 192.168.15.255 scope global dynamic noprefixroute wlp4s0
valid_lft 11638sec preferred_lft 11638sec
inet6 2804:7f0:b980:7174:f5b5:34f3:be57:c90e/64 scope global dynamic noprefixroute
valid_lft 43170sec preferred_lft 43170sec
inet6 fe80::f9c3:d2a:431f:b878/64 scope link noprefixroute
valid_lft forever preferred_lft forever
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:16:bf:bb:e8 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
8: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1280 qdisc pfifo_fast state UNKNOWN group default qlen 3
link/ppp
inet <client vpn ip> peer <vpn ip 17>/32 scope global ppp0
valid_lft forever preferred_lft forever