Re: Continuing internet oddities

[cothrige <cothrige@bellsouth.net>]

* H.S. (hs.samix@gmail.com) wrote:
> 
> I am not sure if I see the picture: are you trying to connect to your 
> ADSL modem through a router or directly from your Debian computer?

I have an ADSL modem which is connected to my Linksys router with my
computer then connected to that, as is my wife's.  In the past this
worked fine, but lately the connection is uber-flaky.  It doesn't
always come up at boot, and even when it does it is dropping out
badly.  When this happens I will experience something like five
minutes at a time without any ability to access anything online at
all.  Very irritating, and since it is intermittent I am not sure
where to look.

> When you expect a connection to have been established, what is the 
> output of these commands:
> 
> $> route -n
> $> ifconfig -a
> $> cat /etc/resolv.conf

BTW, I had to run this as root, even though it appears you were
expecting a user account to work, but I could not get it to that way.
But, in any case, here is what I get:

For 'route -n':
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref Use Iface
192.168.15.0    0.0.0.0         255.255.255.0   U     0      0   0   eth0
0.0.0.0         192.168.15.1    0.0.0.0         UG    0      0   0   eth0

For 'ifconfig -a':
eth0      Link encap:Ethernet  HWaddr 00:0B:6A:23:86:A3  
          inet addr:192.168.15.100  Bcast:192.168.15.255
	  Mask:255.255.255.0
          inet6 addr: fe80::20b:6aff:fe23:86a3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12450 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11713 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11811320 (11.2 MiB)  TX bytes:1723885 (1.6 MiB)
          Interrupt:169 Base address:0xdc00 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:28767 errors:0 dropped:0 overruns:0 frame:0
          TX packets:28767 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3646278 (3.4 MiB)  TX bytes:3646278 (3.4 MiB)

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

For 'cat /etc/resolv.conf':
search launchmodem.com
nameserver 192.168.1.254

> What do you get in your /var/log/syslog? Also, are you running a 
> firewall? If you have a router, what model is it?

I had looked through my logs and nothing jumped out at me, but in
doing so again I do notice several lines like this sprinkled through:

Nov  9 12:28:12 celephais identd[9881]: netlink_lookup: write failed:
Connection refused

This also surprised me as I didn't think I had identd running.  Or am
I misreading this?

As for a firewall, yes, I was running a local firewall, as a just in
case even though my router also does this, but I turned it off
thinking it may be getting in the way.  I have not noticed yet if that
helped, since the problem is not constant it will take a while to have
an idea.

Hopefully something above can help pinpoint what I have that is not
working quite right.

Many thanks,

Patrick