Internet problem on slackware 12.0

Monfort.Brice · 03-09-2008, 11:01 AM

I just installed slack yesterday and i'm having some problem to connect my computer to internet.

IP : 172.20.5.108
Netmask : 255.255.0.0
Gateway : 172.20.0.1
DNS : 208.67.222.222 - 208.67.222.220

here is what my /etc/rc.d/rc.inet1.conf look like after i put my settings :

Code:

......
#Config information for eth0:
IPADDR[0]="172.20.5.108"
NETMASK[0]="255.255.0.0"
USE_DHCP[0]=""
DHCP_HOSTNAME[0]=""
......
#Default gateway IP address :
GATEWAY="172.20.0.1"
......
DEBUG_ETH_UP="yes"
......

If i ping a computer on the network :

Code:

#ping -c 5 172.20.3.102
PING 172.20.3.102 (172.20.3.102) 56(84) bytes of data.
64 bytes from 172.20.3.102: icmp_seq=1 ttl=128 time=1.17 ms
64 bytes from 172.20.3.102: icmp_seq=2 ttl=128 time=0.342 ms
64 bytes from 172.20.3.102: icmp_seq=3 ttl=128 time=0.350 ms
64 bytes from 172.20.3.102: icmp_seq=4 ttl=128 time=0.352 ms
64 bytes from 172.20.3.102: icmp_seq=5 ttl=128 time=0.329 ms

--- 172.20.3.102 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4000ms
rtt min/avg/max/mdev = 0.329/0.510/1.178/0.334 ms

So it seems to be ok with the local network.

here is my /etc/resolv.conf :

Code:

search slackware.com
nameserver 213.244.0.15
nameserver 213.244.0.16
nameserver 208.67.222.222
nameserver 208.67.222.220

but if i try a :

Code:

#links www.google.fr

i have :

Code:

Error loading http://www.google.fr : Host not found

as i know the DNS are fine, i look my route :

Code:

#route
Kernel IP routing table
Destination     Gateway       Genmask     Flags  Metric  Ref  Use  Iface
localnet        *             255.255.0.0 U      0       0      0  eth0
loopback        *             255.0.0.0   U      0       0      0  lo
default         172.20.0.1    0.0.0.0     UG     1       0      0  eth0

I think the 0.0.0.0 netmask for my gateway is weird and it also take a little longer for this line to appear so i decide to del it and to make a new route

Code:

#route del default
#route add default gateway 172.20.0.1 netmask 255.255.0.0 dev eth0
#route
Kernel IP routing table
Destination     Gateway       Genmask     Flags  Metric  Ref  Use  Iface
default         172.20.0.1    255.255.0.0 UG     1       0      0  eth0
localnet        *             255.255.0.0 U      0       0      0  eth0
loopback        *             255.0.0.0   U      0       0      0  lo

it seems to be better as the line appear a lot faster now but i still can't reach the internet. If someone have an idea i take it.

bathory · 03-09-2008, 12:32 PM

Quote:

here is my /etc/resolv.conf :

Code:

search slackware.com
nameserver 213.244.0.15
nameserver 213.244.0.16
nameserver 208.67.222.222
nameserver 208.67.222.220

Since you said your dns servers are the 2 starting with 208.x.x.x, change the order in /etc/resolv.conf and put them in top of the other 2 and then try to resolve a domain to see if it works, i.e:

Code:

dig www.google.com

Monfort.Brice · 03-09-2008, 01:06 PM

Code:

#dig www.google.fr

; <<>> DiG 9.4.1 <<>> www.google.fr
;; global options: printcmd
;; connection timed out; no server could be reached

I don't think the order matter, it takes the first DNS then the second and so on until it gets an answer. Any other idea ?

allend · 03-09-2008, 07:17 PM

Try changing your netmask to 255.255.255.255

bathory · 03-10-2008, 09:20 AM

Use

Code:

route add default gw 172.20.0.1

to define gateway.
Then try to ping gateway and if you succeed run dig changing dns servers to see which one works:

Code:

dig www.google.com @213.244.0.15
dig www.google.com @208.67.222.222

Regards