problems with DNS - PPP + Elsa 56k Modem

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hello,
I've a FC3 with an external Elsa Microlink 56k modem on /dev/ttyS0.
all works OK (both with kppp and with the activation of the pp0 from the
network panel): I.E. the /sbin/route -n once connected says:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
212.63.96.77    0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         212.63.96.77    0.0.0.0         UG    0      0        0 ppp0

the problem is about (I guess...) DNS.
ping doesn't go, I.E.:

[root@fedora3 etc]# ping www.google.com
ping: unknown host www.google.com

[root@fedora3 etc]# ping  66.249.93.104
PING 66.249.93.104 (66.249.93.104) 56(84) bytes of data.
ping: sendmsg: Operation not permitted


...and the corresponding logs are tons of things like these:

Nov  6 21:11:06 fedora3 kernel: Unknown InputIN=ppp0 OUT= MAC=
SRC=218.27.16.180 DST=212.63.101.78 LEN=337 TOS=0x00 PREC=0x00 TTL=42 ID=0
DF PROTO=UDP SPT=59758 DPT=1026 LEN=317 
Nov  6 21:11:29 fedora3 kernel: Unknown OutputIN= OUT=ppp0
SRC=212.63.101.78 DST=66.249.93.104 LEN=84 TOS=0x00 PREC=0x00 TTL=64 ID=0
DF PROTO=ICMP TYPE=8 CODE=0 ID=17717 SEQ=0 
Nov  6 21:11:30 fedora3 kernel: Unknown OutputIN= OUT=ppp0
SRC=212.63.101.78 DST=66.249.93.104 LEN=84 TOS=0x00 PREC=0x00 TTL=64 ID=1
DF PROTO=ICMP TYPE=8 CODE=0 ID=17717 SEQ=1 


my /etc/resolv.conf is:

search home.net
nameserver 192.168.0.50
nameserver 212.63.96.34
nameserver 212.63.96.35

192.168.0.50 DNS is ***only internal**** (home.net, for experimental
purpose) with BIND
in other words, in /var/named/chroot/etc/named.conf the outside zone is all
 /*commented*/

The 212.63**** DNSs are my provider's regular and in-great-shape DNSs.


any clue?

as always thanks a lot in advance for your reply,

fabiano




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