[ale] RH8 "Temporary failure in name resolution"

Jonathan Glass (IBB) jonathan.glass at ibb.gatech.edu
Mon Feb 17 22:37:33 EST 2003


Quite frankly, your subnet mask looks wrong.  You may want to verify it.

Can you run "cat /proc/sys/net/ipv4/ip_forward"?  If it is 0, then you
are not routing on your router box.

This really sounds like a mask issue.  T U sure it is not supposed 2 B
255.255.255.254?  Do you have more than 2 usable ip addies?

hth

jbg

On Sun, 2003-02-16 at 16:33, Kevin Krumwiede wrote:
> On Mon, 2003-02-17 at 21:30, James P. Kinney III wrote:
> > Double check the routing with netstat -rn. Sometimes 2 Nics in a box
> > causes route table typing problems :)
> 
> See anything wrong with this?
> 
> # netstat -r
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface
> 192.168.1.0     *               255.255.255.0   U        40 0          0
> eth1
> 68.54.20.0      *               255.255.254.0   U        40 0          0
> eth0
> 127.0.0.0       *               255.0.0.0       U        40 0          0
> lo
> default         68.54.20.1      0.0.0.0         UG       40 0          0
> eth0
> 
> #ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
>           inet addr:68.54.21.XX  Bcast:68.54.21.255  Mask:255.255.254.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1825751 errors:1 dropped:0 overruns:0 frame:1
>           TX packets:1034919 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:1537 txqueuelen:100 
>           RX bytes:384340324 (366.5 Mb)  TX bytes:149228183 (142.3 Mb)
>           Interrupt:11 Base address:0x1000 
> 
> 
> I can connect from a host on my LAN, via the above router, to a host on
> the Internet.  I can connect from a host on my LAN to the httpd on the
> router.  I can connect from one host to another on the LAN.  What I
> *cannot* do is connect from the router, to any host on any network.  I
> even went as far as:
> 
> # iptables -P INPUT ACCEPT
> # iptables -F INPUT
> # iptables -P OUTPUT ACCEPT
> # iptables -F OUTPUT
> 
> tcpdump still shows *nothing* from any attempted outbound connections.
> 
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