Please help: Wierd traceroute's and pings

Please help: Wierd traceroute's and pings

Post by Dave Hamilto » Sun, 20 Jun 1999 04:00:00



Ok... I'm at a loss... and something's NOT right.  I'm running RedHat
6.0 with the "RedHat Approved" kernel 2.2.5-22 on a dual Pentium 100
Dell machine with 48MB of RAM.  I have two 3C509 ethernet cards in the
machine, one connected to a cable modem using the modified dhcpcd
client for RoadRunner, and the other assigned a static "IANA-reserved"
address connected to my home network.  I have set up ipchains to
perform masquerading tasks and it all seems to work just fine.
However, when I traceroute or ping from the linux machine DIRECTLY, I
get VERY strange results, i.e:

PING www.sprint.net (208.27.196.10): 56 data bytes
64 bytes from 208.27.196.10: icmp_seq=0 ttl=243 time=-969.-8 ms
64 bytes from 208.27.196.10: icmp_seq=1 ttl=243 time=68.8 ms
64 bytes from 208.27.196.10: icmp_seq=2 ttl=243 time=63.8 ms
64 bytes from 208.27.196.10: icmp_seq=3 ttl=243 time=41978.7 ms
64 bytes from 208.27.196.10: icmp_seq=4 ttl=243 time=69.6 ms
64 bytes from 208.27.196.10: icmp_seq=5 ttl=243 time=67.9 ms
64 bytes from 208.27.196.10: icmp_seq=6 ttl=243 time=69.2 ms
64 bytes from 208.27.196.10: icmp_seq=7 ttl=243 time=72.0 ms
64 bytes from 208.27.196.10: icmp_seq=8 ttl=243 time=67.5 ms
64 bytes from 208.27.196.10: icmp_seq=9 ttl=243 time=78.4 ms
64 bytes from 208.27.196.10: icmp_seq=10 ttl=243 time=69.5 ms
64 bytes from 208.27.196.10: icmp_seq=11 ttl=243 time=41984.6 ms

--- www.sprint.net ping statistics ---
12 packets transmitted, 12 packets received, 0% packet loss
round-trip min/avg/max = -969.-8/6968.3/41984.6 ms

Very strange.  This happens whether I've loaded my ipchains rules or
not, so I don't think it has to do with them.  The strange thing, of
course, is that when I do the same ping from my Mac or Windows machines
inside the network, they work FINE and give "normal" results to
traceroutes and pings.

Any thoughts?

Please help!

-Dave

 
 
 

1. pppd is up, but cannot ping/traceroute/connect to internet - help please

I am pretty new to linux but everything worked fine with my connection
since installation 6 months ago until yesterday.....
Now when I use kppp the modem connects with the ISP with no problem
but after that, none of the browsers will get to any site.
Additionally:
a. I have tried ping and no packet was returned
b. I have tried traceroute and it says it cannot send

I am really new to networking so maybe I have done a silly thing and
now cannot see what it is........
I would really appreciate any help on how to fix it.

Thanks in advance
Federico

===============================================
This is the output of ifconfig:
lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:32 errors:0 dropped:0 overruns:0 frame:0

          TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2852 (2.7 Kb)  TX bytes:2852 (2.7 Kb)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:216.244.244.213  P-t-P:216.244.192.37
Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:4 errors:2 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:70 (70.0 b)  TX bytes:87 (87.0 b)
===========================================================================
This is the ouput of route

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref  
Use Iface
216.244.192.37  *               255.255.255.255 UH    0      0      
0 ppp0
127.0.0.0       *               255.0.0.0       U     0      0      
0 lo
default         216.244.192.37  0.0.0.0         UG    0      0      
0 ppp0
============================================================================

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