Ubuntu
Linux pppd 失敗但 NetworkManager 工作
所以我試圖讓我的 PtP 調製解調器“Telit ME910”通過 pppd 使用 Ubuntu 16.04 連接到 Verizon LTE 網路。
如果我連接它並通過“啟用移動寬頻”的標準網路管理器步驟，它會找到預設的 APN 並列出它，所以我可以選擇“Verizon 4G LTE 契約 1”，它連接得很漂亮。它使用 IP 創建了 ppp0 介面，然後我可以成功 PING 8.8.8.8。
如果我連接它並發出“pppd call verizon”，它將創建帶有IP的ppp0介面，但PING失敗？我知道 ModemManager 和 NetworkManager 比 pppd 做得更多，但我無法找出我缺少的東西。任何幫助都將是驚人的。
/etc/ppp/peers/verizon:
/dev/ttyUSB1 115200 connect "/usr/sbin/chat -v -f /etc/ppp/peers/verizon-chat" noauth #nodefaultroute defaultroute replacedefaultroute usepeerdns local debug persist #updetach nodetach工作連接的詳細資訊：
# ip route show table all default dev ppp0 proto static scope link metric 700 169.254.0.0/16 dev ppp0 scope link metric 1000 local 100.124.161.186 dev ppp0 table local proto kernel scope host src 100.124.161.186 broadcast 100.124.161.186 dev ppp0 table local proto kernel scope link src 100.124.161.186 broadcast 127.0.0.0 dev lo table local proto kernel scope link src 127.0.0.1 local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1 local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1 broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1 unreachable default dev lo table unspec proto kernel metric 4294967295 error -101 pref medium local ::1 dev lo table local proto none metric 0 pref medium ff00::/8 dev eno1 table local metric 256 linkdown pref medium unreachable default dev lo table unspec proto kernel metric 4294967295 error -101 pref medium ppp0 Link encap:Point-to-Point Protocol inet addr:100.113.251.242 P-t-P:0.0.0.0 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:260 errors:0 dropped:0 overruns:0 frame:0 TX packets:301 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:82504 (82.5 KB) TX bytes:62112 (62.1 KB) Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 0.0.0.0 U 700 0 0 ppp0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 ppp0此處的系統日誌：workingSyslog
連接失敗的詳細資訊：
# ip route show table all default dev ppp0 scope link 10.64.64.64 dev ppp0 proto kernel scope link src 100.122.108.86 local 100.122.108.86 dev ppp0 table local proto kernel scope host src 100.122.108.86 broadcast 127.0.0.0 dev lo table local proto kernel scope link src 127.0.0.1 local 127.0.0.0/8 dev lo table local proto kernel scope host src 127.0.0.1 local 127.0.0.1 dev lo table local proto kernel scope host src 127.0.0.1 broadcast 127.255.255.255 dev lo table local proto kernel scope link src 127.0.0.1 unreachable default dev lo table unspec proto kernel metric 4294967295 error -101 pref medium local ::1 dev lo table local proto none metric 0 pref medium ff00::/8 dev eno1 table local metric 256 linkdown pref medium unreachable default dev lo table unspec proto kernel metric 4294967295 error -101 pref medium ppp0 Link encap:Point-to-Point Protocol inet addr:100.122.108.86 P-t-P:10.64.64.64 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:5 errors:0 dropped:0 overruns:0 frame:0 TX packets:43 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:38 (38.0 B) TX bytes:2065 (2.0 KB) Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 10.64.64.64 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0此處的系統日誌：失敗的系統日誌
非常感謝任何提示或建議。我已經手動更改了 ppp0 的路由表和介面設置，因此它們與我在使用 GUI(NetworkManager) 時看到的完全匹配，但它仍然拒絕允許即使是簡單的 PING 8.8.8.8 在 ppp0 上通過。很明顯，標準“ifconfig/route -env/ip route show table all”類型的命令沒有反映導致斷開連接的一些網路細節。
所以經過漫長而艱苦的搜尋，我終於在我的 ppp 選項文件中添加了“+ipv6”，一切都開始工作了。現在弄清楚並理解為什麼需要該選項！
使用 NetworkManager，
ppp連接配置不會與常見的網路配置腳本一起儲存。為了調試
ppp連接，我使用nmcli了系統控制台中的命令。為此，我將從
$ nmcli con show $ mmcli dev status $ ip route在正常工作的網關伺服器上，
ppp它看起來像這樣：$ nmcli con show NOMBRE UUID TIPO DISPOSITIVO ppp0 ec723ebc-3675-4d8a-81e8-8989bb275307 pppoe enp1s0 enp1s0 c0ab6b8c-0eac-a1b4-1c47-efe4b2d1191f 802-3-ethernet -- $ nmcli dev status DISPOSITIVO TIPO ESTADO CONEXIÓN enp1s0 ethernet conectado ppp0 lo loopback sin gestión -- $ ip route default via 80.58.67.182 dev ppp0 proto static metric 100 80.58.67.182 dev ppp0 proto kernel scope link src <net.wor.k.ip> metric 100然後執行
$ nmcli con show ppp0它可能會給你這樣的東西：
$ nmcli con show ppp0 connection.id: ppp0 connection.uuid: ec723ebc-3675-4d8a-81e8-8989bb275307 connection.stable-id: -- connection.interface-name: enp1s0 connection.type: pppoe connection.autoconnect: yes connection.autoconnect-priority: 100 connection.autoconnect-retries: -1 (predeterminado) connection.timestamp: 1529677563 connection.read-only: no connection.permissions: -- connection.zone: -- connection.master: -- connection.slave-type: -- connection.autoconnect-slaves: -1 (predeterminado) connection.secondaries: -- connection.gateway-ping-timeout: 0 connection.metered: desconocido connection.lldp: -1 (default) 802-3-ethernet.port: -- 802-3-ethernet.speed: 0 802-3-ethernet.duplex: -- 802-3-ethernet.auto-negotiate: no 802-3-ethernet.mac-address: -- 802-3-ethernet.cloned-mac-address: -- 802-3-ethernet.generate-mac-address-mask:-- 802-3-ethernet.mac-address-blacklist: -- 802-3-ethernet.mtu: auto 802-3-ethernet.s390-subchannels: -- 802-3-ethernet.s390-nettype: -- 802-3-ethernet.s390-options: -- 802-3-ethernet.wake-on-lan: 1 (default) 802-3-ethernet.wake-on-lan-password: -- ipv4.method: auto ipv4.dns: -- ipv4.dns-search: -- ipv4.dns-options: (predeterminado) ipv4.dns-priority: 0 ipv4.addresses: -- ipv4.gateway: -- ipv4.routes: -- ipv4.route-metric: -1 ipv4.ignore-auto-routes: no ipv4.ignore-auto-dns: no ipv4.dhcp-client-id: -- ipv4.dhcp-timeout: 0 ipv4.dhcp-send-hostname: yes ipv4.dhcp-hostname: -- ipv4.dhcp-fqdn: -- ipv4.never-default: no ipv4.may-fail: yes ipv4.dad-timeout: -1 (predeterminado) ipv6.method: auto ipv6.dns: -- ipv6.dns-search: -- ipv6.dns-options: (predeterminado) ipv6.dns-priority: 0 ipv6.addresses: -- ipv6.gateway: -- ipv6.routes: -- ipv6.route-metric: -1 ipv6.ignore-auto-routes: no ipv6.ignore-auto-dns: no ipv6.never-default: no ipv6.may-fail: yes ipv6.ip6-privacy: -1 (desconocido) ipv6.addr-gen-mode: eui64 ipv6.dhcp-send-hostname: yes ipv6.dhcp-hostname: -- ipv6.token: -- ppp.noauth: yes ppp.refuse-eap: no ppp.refuse-pap: no ppp.refuse-chap: no ppp.refuse-mschap: no ppp.refuse-mschapv2: no ppp.nobsdcomp: no ppp.nodeflate: yes ppp.no-vj-comp: no ppp.require-mppe: no ppp.require-mppe-128: no ppp.mppe-stateful: no ppp.crtscts: no ppp.baud: 0 ppp.mru: 1492 ppp.mtu: 1492 ppp.lcp-echo-failure: 0 ppp.lcp-echo-interval: 0 pppoe.service: -- pppoe.username: <provider_login> pppoe.password: <hidden> pppoe.password-flags: 0 (none) proxy.method: none proxy.browser-only: no proxy.pac-url: -- proxy.pac-script: -- GENERAL.NOMBRE: ppp0 GENERAL.UUID: ec723ebc-3675-4d8a-81e8-8989bb275307 GENERAL.DISPOSITIVOS: enp1s0 GENERAL.ESTADO: activada GENERAL.PREDETERMINADO: sí GENERAL.PREDETERMINADO6: no GENERAL.VPN: no GENERAL.ZONA: -- GENERAL.RUTA-DBUS: /org/freedesktop/NetworkManager/ActiveConnection/2 GENERAL.CON-RUTA: /org/freedesktop/NetworkManager/Settings/5 GENERAL.OBJETO SPEC: -- GENERAL.MASTER-RUTA: -- IP4.DIRECCIÓN[1]: <net.wor.k.ip>/32 IP4.PUERTA DE ENLACE: 80.58.67.182 IP4.DNS[1]: 80.58.61.250 IP4.DNS[2]: 80.58.61.254 IP6.DIRECCIÓN[1]: fe80::beae:c5ff:fe34:f062/64 IP6.PUERTA DE ENLACE: --您可能會在以下位置找到配置文件：
# pwd /etc/NetworkManager/system-connections # ls -lah total 8,0K drwxr-xr-x. 2 root root 17 mar 22 14:26 . drwxr-xr-x. 7 root root 4,0K feb 7 14:26 .. -rw------- 1 root root 366 mar 22 14:26 ppp0 # cat ppp0 [connection] id=ppp0 uuid=ec723ebc-3675-4d8a-81e8-8989bb275307 interface-name=enp1s0 type=pppoe permissions= timestamp=1437654424 secondaries= autoconnect-priority=100 [pppoe] username=<provider_login> password=<login_password> [ipv6] method=auto dns-search= [ipv4] method=auto dns-search= [ethernet] mac-address-blacklist= [ppp] nodeflate=true mru=1492 mtu=1492