[Novalug] route take a very long time ( elongated )

James Ewing Cottrell III jecottrell3@comcast.net
Thu Dec 22 23:04:43 EST 2016


You can also put Any Name You Like for Any IP You Want in /etc/hosts.

JIM

On 12/17/2016 2:39 PM, Walt Smith via Novalug wrote:
> first:
> route -n    is fast
> route -C    is slow
> route      is slow.
> ( see below for IP info later )
>
> I'm beginning to believe my problem is at the ISP's
> end of the stick.  I won't try to fix his problem,
> but for my own benefit, I'd like to see if there's
> any more basic troubleshooting I can do at my
> end.
>
> Symptom 1 :
> Internet access over ppp stops.
> Symptom 2 : only outgoing packaets made the modem light
> blink, as in a ping
> Symptom 3 : no incoming data at all is seen on the receive
> end ( the modem ).
> Symptom 4:  In the tcpdump below, the appearance to me is that the
> domains names are concatentated.  PLEASE CORRECT ME
> if I'm reading the elongated names incorrectly.
> i.e.
>  www.google.com.dynamic-dialup.coretel.net.
>
> ( but again, Nothing comes back - not even error messages )
>
> This all seems to be layer 3-4 work.
> Is there anything testable at layer 2 ?
>
>
> Comments welcome.  Including ""Your ISP is crap ! "   < grin  >
>
>
> thx,
>
> Walt.............
>
> +++++++++++++++++++++++++++++++++++++++++++
> [root@core-bltm-69-72-61-124 CentOS-6.8]# route -C
> Kernel IP routing cache
> Source          Destination     Gateway         Flags Metric Ref    Use Iface
> 69.72.61.7      208.67.220.220  208.67.220.220        0      0       30 ppp0
> 69.72.61.7      8.8.8.8         8.8.8.8               0      0       30 ppp0
> 69.72.61.7      208.67.220.220  208.67.220.220        0      2       32 ppp0
> 69.72.61.7      8.8.8.8         8.8.8.8               0      2       32 ppp0
> 192.168.1.10    224.0.0.251     224.0.0.251     ml    0      0        9 eth0
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 209.163.113.81  0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
> 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0 ppp0
>
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 209.163.113.81  *               255.255.255.255 UH    0      0        0 ppp0
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
> default         *               0.0.0.0         U     0      0        0 ppp0
>
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:0C:F1:8B:DF:79
>           inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::20c:f1ff:fe8b:df79/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:442624 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:107986 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:144791334 (138.0 MiB)  TX bytes:13094523 (12.4 MiB)
>
> 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:65536  Metric:1
>           RX packets:54495 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:54495 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:4607635 (4.3 MiB)  TX bytes:4607635 (4.3 MiB)
>
> ppp0      Link encap:Point-to-Point Protocol
>           inet addr:69.72.61.7  P-t-P:209.163.113.81  Mask:255.255.255.255
>           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
>           RX packets:626 errors:2 dropped:0 overruns:0 frame:0
>           TX packets:1058 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:3
>           RX bytes:244607 (238.8 KiB)  TX bytes:110996 (108.3 KiB
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# nslookup  ## ( is this cached ??)
>> server
> Default server: 208.67.220.220   # ( opendns )
> Address: 208.67.220.220#53
> Default server: 8.8.8.8    # (seems google )
> Address: 8.8.8.8#53
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# ping 208.67.220.220
> PING 208.67.220.220 (208.67.220.220) 56(84) bytes of data.
> ^C
> --- 208.67.220.220 ping statistics ---
> 9 packets transmitted, 0 received, 100% packet loss, time 8257ms
>
>
>  [root@core-bltm-69-72-61-124 CentOS-6.8]# ping 8.8.8.8
> PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
> ^C
> --- 8.8.8.8 ping statistics ---
> 11 packets transmitted, 0 received, 100% packet loss, time 10225ms
>
>
> [root@core-bltm-69-72-61-124 CentOS-6.8]# tcpdump -i ppp0
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on ppp0, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes
> 14:15:59.765023 IP 69.72.61.7.35985 > 8.8.8.8.domain: 51752+ A? www.google.com.dynamic-dialup.coretel.net. (59)
> 14:15:59.765078 IP 69.72.61.7.35985 > 8.8.8.8.domain: 39494+ AAAA? www.google.com.dynamic-dialup.coretel.net. (59)
> 14:15:59.766575 IP 69.72.61.7.50282 > 208.67.220.220.domain: 19921+ PTR? 8.8.8.8.in-addr.arpa. (38)
> 14:15:59.771307 IP 69.72.61.7.58684 > 208.67.220.220.domain: 33981+ A? www.google.com. (32)
> 14:16:04.766875 IP 69.72.61.7.41061 > 8.8.8.8.domain: 19921+ PTR? 8.8.8.8.in-addr.arpa. (38)
> 14:16:04.769177 IP 69.72.61.7.46072 > 208.67.220.220.domain: 51752+ A? www.google.com.dynamic-dialup.coretel.net. (59)
> 14:16:04.769195 IP 69.72.61.7.46072 > 208.67.220.220.domain: 39494+ AAAA? www.google.com.dynamic-dialup.coretel.net. (59)
>
>
>
>
>
>
>
> ----
>  The government is lawless, not the press (people).
>  ( [Supreme Court] Justice Douglas re: The Pentagon Papers )
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