🔗 Tethering no Linux com celular Nokia, conectando no 3G da TIM
E eis que consegui conectar o notebook à internet usando o celular Nokia (N85) e um cabo USB. (Ok, tive que catar instruções lendo no browserzinho do celular, mas rolou!)
Condensando aqui as instruções para facilitar minha vida da próxima vez:
1) Configurar o celular para conectar em modo “PC Suite” (normalmente eu deixo em “Mass storage”). No celular: Tools → Settings → Connection→ USB → USB Connection Mode: “PC Suite”
2) Plugar o celular na USB. Devem aparecer linhas mais ou menos assim no log do kernel (/var/log/kernel, dmesg)
usb 2-1.2: new high speed USB device using ehci_hcd and address 5 usb 2-1.2: New USB device found, idVendor=0421, idProduct=0094 usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-1.2: Product: N85 usb 2-1.2: Manufacturer: Nokia usb 2-1.2: SerialNumber: 356808020426058 usb 2-1.2: configuration #1 chosen from 1 choice cdc_acm 2-1.2:1.1: ttyACM0: USB ACM device usbcore: registered new interface driver cdc_acm cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters NET: Registered protocol family 35 cdc_phonet: probe of 2-1.2:1.12 failed with error -22 usbcore: registered new interface driver cdc_phonet usbcore: registered new interface driver cdc_ether usb 2-1.2: bad CDC descriptors usbcore: registered new interface driver rndis_host usb 2-1.2: bad CDC descriptors usbcore: registered new interface driver rndis_wlan
O principal ali é o “ttyACM0”, que indica que criou o device. Conferir que existe agora um arquivo /dev/ttyACM0
3) Arquivo /etc/ppp/peers/tether:
ttyACM0 460800 crtscts connect '/usr/sbin/chat -v -f /etc/ppp/chat-tether' noauth
O nome “tether” é arbitrário, pode ser qualquer um (será usado abaixo), mas o pppd parece realmente querer os arquivos no diretório /etc/ppp/peers.
4) Arquivo /etc/ppp/chat-tether:
TIMEOUT 5 ECHO ON ABORT BUSY ABORT ERROR ABORT 'NO CARRIER' ABORT VOICE ABORT 'NO DIALTONE' ABORT 'NO DIAL TONE' ABORT 'NO ANSWER' ABORT DELAYED TIMEOUT 12 '' ATZ OK AT+CGDCONT=1,"IP","tim.br" OK ATD*99# CONNECT ''
Note a APN da operadora TIM ali. Para outras operadoras, mudar ali de acordo (gprs.oi.com.br, claro.com.br, zap.vivo.com.br).
O nome do arquivo deve ser o mesmo referenciado dentro do arquivo /etc/ppp/peers/tether acima.
5) Rodar: sudo pppd call tether
Se tudo for bem, aparecerá algo assim no /var/log/messages:
Jul 16 21:24:32 (none) pppd[4746]: pppd 2.4.4 started by root, uid 0 Jul 16 21:24:33 (none) chat[4747]: timeout set to 5 seconds Jul 16 21:24:33 (none) chat[4747]: abort on (BUSY) Jul 16 21:24:34 (none) chat[4747]: abort on (ERROR) Jul 16 21:24:34 (none) chat[4747]: abort on (NO CARRIER) Jul 16 21:24:34 (none) chat[4747]: abort on (VOICE) Jul 16 21:24:34 (none) chat[4747]: abort on (NO DIALTONE) Jul 16 21:24:34 (none) chat[4747]: abort on (NO DIAL TONE) Jul 16 21:24:34 (none) chat[4747]: abort on (NO ANSWER) Jul 16 21:24:34 (none) chat[4747]: abort on (DELAYED) Jul 16 21:24:34 (none) chat[4747]: timeout set to 12 seconds Jul 16 21:24:34 (none) chat[4747]: send (ATZ^M) Jul 16 21:24:34 (none) chat[4747]: expect (OK) Jul 16 21:24:34 (none) chat[4747]: ATZ^M^M Jul 16 21:24:34 (none) chat[4747]: OK Jul 16 21:24:34 (none) chat[4747]: -- got it Jul 16 21:24:34 (none) chat[4747]: send (AT+CGDCONT=1,"IP","tom.br"^M) Jul 16 21:24:34 (none) chat[4747]: expect (OK) Jul 16 21:24:34 (none) chat[4747]: ^M Jul 16 21:24:34 (none) chat[4747]: AT+CGDCONT=1,"IP","tom.br"^M^M Jul 16 21:24:34 (none) chat[4747]: OK Jul 16 21:24:34 (none) chat[4747]: -- got it Jul 16 21:24:34 (none) chat[4747]: send (ATD*99#^M) Jul 16 21:24:34 (none) chat[4747]: expect (CONNECT) Jul 16 21:24:34 (none) chat[4747]: ^M Jul 16 21:24:34 (none) chat[4747]: ATD*99#^M^M Jul 16 21:24:34 (none) chat[4747]: CONNECT Jul 16 21:24:34 (none) chat[4747]: -- got it Jul 16 21:24:34 (none) chat[4747]: send (^M) Jul 16 21:24:34 (none) pppd[4746]: Serial connection established. Jul 16 21:24:34 (none) pppd[4746]: Using interface ppp0 Jul 16 21:24:34 (none) pppd[4746]: Connect: ppp0 <--> /dev/ttyACM0 Jul 16 21:24:37 (none) pppd[4746]: local IP address 189.67.100.239 Jul 16 21:24:37 (none) pppd[4746]: remote IP address 10.6.6.6
E deve aparecer um ppp0 no ifconfig:
ppp0 Link encap:Point-to-Point Protocol inet addr:189.67.100.239 P-t-P:10.6.6.6 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:8938 errors:0 dropped:0 overruns:0 frame:0 TX packets:7998 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:7405264 (7.0 Mb) TX bytes:1018670 (994.7 Kb)
6) Estabelecer o default gateway: sudo route add default gw 10.6.6.6
Conferir com o comando route:
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.6.6.6 * 255.255.255.255 UH 0 0 0 ppp0 default 10.6.6.6 0.0.0.0 UG 0 0 0 ppp0
7) Configurar o DNS (por exemplo, com o DNS público do Google). Arquivo /etc/resolv.conf:
nameserver 8.8.8.8
Feito isso, o acesso à internet deve estar funcionando normalmente no computador!
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