PPP, ping and 100% packet loss

PPP, ping and 100% packet loss

Post by removethi » Sun, 14 Feb 1999 04:00:00



I am using minicom to dial into my ISP, at which point I run pppd with
the defaultroute option.  I have been following The Linux Users
Guide(?) from sunsite which suggests to first establish a connection
without scripts.  Well, after connecting I am unable to ping.  Here
are some of the outputs I get:

#ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Bcast:127.255.255.255  Mask:255.0.0.0
          UP BROADCAST LOOPBACK RUNNING  MTU:3584  Metric:1
          RX packets:43 errors:0 dropped:0 overruns:0 frame:0
          TX packets:43 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:206.180.128.118  P-t-P:204.52.135.15
Mask:255.255.255.0
          UP POINTOPOINT RUNNING  MTU:552  Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0
          Memory:689e830-689ec94

#route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags  Use Iface
204.52.135.15   0.0.0.0    255.255.255.255  UH       1 ppp0
127.0.0.0       0.0.0.0         255.0.0.0              U        2  lo
0.0.0.0         204.52.135.15   0.0.0.0         UG           0 ppp0

Note: I remove two columns for this post: Metric and Ref which both
had values of zero.

#ping 204.52.135.15
PING 204.52.135.15 (204.52.135.15): 56 data bytes

--- 204.52.135.15 ping statistics ---
11 packets transmitted, 0 packets received, 100% packet loss

I really don't know what to do.  I would appreciate any help.  Thanks.

 
 
 

PPP, ping and 100% packet loss

Post by Clifford Ki » Sun, 14 Feb 1999 04:00:00


: I am using minicom to dial into my ISP, at which point I run pppd with
: the defaultroute option.  I have been following The Linux Users
: Guide(?) from sunsite which suggests to first establish a connection
: without scripts.  Well, after connecting I am unable to ping.  Here

If ping is the only problem, then the ISP may not be routing ping -
you can thank the uglies and their SYN flooding attacks for that.

Your ppp interface and routing looked good.  If ping is not the only
Internet access problem, then you might try the pppd option "asyncmap 0"
or, should that fail, "asyncmap a0000".  Otherwise you'll likely need
to look for clues in /var/log/messages and /var/log/debug (usually).

--

/* Speak softly and carry a +6 two-handed sword. */

 
 
 

PPP, ping and 100% packet loss

Post by Bob Glove » Tue, 16 Feb 1999 04:00:00


The route at the other end of my PPP connection will not respond to pings
either.
But my link is good.  Try pinging something else, like their DNS server.



Quote:>I am using minicom to dial into my ISP, at which point I run pppd with
>the defaultroute option.  I have been following The Linux Users
>Guide(?) from sunsite which suggests to first establish a connection
>without scripts.  Well, after connecting I am unable to ping.  Here
>are some of the outputs I get:

>#ifconfig
>lo        Link encap:Local Loopback
>          inet addr:127.0.0.1  Bcast:127.255.255.255  Mask:255.0.0.0
>          UP BROADCAST LOOPBACK RUNNING  MTU:3584  Metric:1
>          RX packets:43 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:43 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0

>ppp0      Link encap:Point-to-Point Protocol
>          inet addr:206.180.128.118  P-t-P:204.52.135.15
>Mask:255.255.255.0
>          UP POINTOPOINT RUNNING  MTU:552  Metric:1
>          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0
>          Memory:689e830-689ec94

>#route -n
>Kernel IP routing table
>Destination     Gateway         Genmask         Flags  Use Iface
>204.52.135.15   0.0.0.0    255.255.255.255  UH       1 ppp0
>127.0.0.0       0.0.0.0         255.0.0.0              U        2  lo
>0.0.0.0         204.52.135.15   0.0.0.0         UG           0 ppp0

>Note: I remove two columns for this post: Metric and Ref which both
>had values of zero.

>#ping 204.52.135.15
>PING 204.52.135.15 (204.52.135.15): 56 data bytes

>--- 204.52.135.15 ping statistics ---
>11 packets transmitted, 0 packets received, 100% packet loss

>I really don't know what to do.  I would appreciate any help.  Thanks.