Re: niečo medzi pppd a internetovou aplikáciu pre Pavel Kankovsky

[Pavel Kankovsky]

On Sat, 12 Oct 2002, Valašik Juraj wrote:

Uz par pokusu poskytnuta data interpretovat se tady objevil, ale snad
s vyjimkou jednoho byly vetsinou zcestne, takze se toho budu muset ujmout
sam. :)

> 4. Je spravne nastavene routovani? (viz route -n resp. netstat -rn
>    resp. ip rule list a ip route list)
> 
> [root na juraj /]# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 195.146.128.43  0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
> 168.0.0.0       0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
> 0.0.0.0         168.0.0.1       0.0.0.0         UG    0      0        0 eth0

Cili chyba je tady (netstat -rn resp ip route list je totez v trochu jinem
formatu). Mate default route (posledni radek s Destination 0.0.0.0) pres
eth0. Nevim, co mate pripojene na ten Ethernet (a nevim, kde jste sebral
IP adresu 168.0.0.1), ale asi tudy pakety do sveta nechodi.

Zkuste po nahozeni PPP nastavit "route add default gw 195.146.128.43" (IP
adresa se muze menit, ale mela byt to by tataz, co je ve vypisu ifconfig
ppp0 za P-t-P:). Resp. "ip route add default via 195.146.128.43", pokud
chcete byt moderni. Jestli to bude fungovat, tak zacnete zkoumat, jak
kppp/pppd presvedcit, aby nastavilo default route (mozna bude stacit,
aby zadna d.r. pred nahozenim PPP neexistovala).

> 5. Chodi pakety? (ping -n resp. traceroute -n na znamou IP adresu
>    (ne jmeno!))
> 
> [root na juraj /]# ping -n 195.146.128.43
> PING 195.146.128.43 (195.146.128.43) from 213.81.136.216 : 56(84) bytes of
> data.
> 64 bytes from 195.146.128.43: icmp_seq=1 ttl=255 time=35.2 ms
> 64 bytes from 195.146.128.43: icmp_seq=2 ttl=255 time=36.0 ms
> 64 bytes from 195.146.128.43: icmp_seq=3 ttl=255 time=35.2 ms
[...]
> --- 195.146.128.43 ping statistics ---
> 29 packets transmitted, 29 received, 0% loss, time 28281ms
> rtt min/avg/max/mdev = 35.203/36.144/46.257/1.955 ms
> 
> >> Tu musim skonstatovat ze modem komunikoval (blikal vstup aj vystup).

Neni divu, kdyz to chodilo pres modem. A uspesne.
Ovsem chodilo to jen z toho duvodu, ze jste si vybral *jedinou* IP adresu,
na kterou se to posilalo pres ppp0.

> 7. Funguje DNS? (host na zname jmeno)
> 
> [root na juraj /]# host zoznam.sk
> ;; connection timed out; no servers could be reached
> [root na juraj /]# host linux.cz
> ;; connection timed out; no servers could be reached

Tohle uz je zjevne nasledek chybneho routingu.

--Pavel Kankovsky aka Peak
"Welcome to the Czech Republic. Bring your own lifeboats."