1. Your routing table is hard to read (due to the "ppp" entry on the first line). But your ifconfig output says that both ends of the ppp link are in netwotk 192.168.0.0/16, which the routing talbe says is in eth0, not ppp0. Usually host routes supersede network routes, but the use of "ppp" conceals the actual address set. When reporting routing tables, ALWAYS use a flag to force reporting by address (e.g., "netstat -nr" or "route -n").
2. Since you are familiar with tcpdump ... are the ping packets going out ANY interface? (Answer with respect both to the host you are ping'ing from AND the "ppp server", if they are different hosts.)
3. here are you ping'ing FROM? The server itself? Some other host on 192.168.0.0/16? Since you talk about proxyarp, I'd guess the second. If so, after you try and fail to ping, does this third host's arp table have an entry for the "ppp server "host? Does the ping fail silently, or is there some error message?
4. Can you ping the "ppp server" from the "ppp client"? If not, how does that ping fail (silently, or is there an error message)?
5. Next time please be very exact about which machine is which.
You say you put "a small PPP server on my home machine".
Later, you talk about "local" and "remote" machines, but I am unclear as to which of these is the ppp "server" (since you said it was your "home" machine, does that mean it is "local"?).
Then you tell us which IP address is "vhcastle", which "ppp", without explaining what the hostnames refer to.
Similarly, later switching to referring to the "server" and the "other end" leaves me confused ... pick one way to refer to each host and stick with it, please.
In addition to clarifying the above items, next time please provide for BOTH hosts (or all 3, if you are ping'ing from yet a different host), the unedited output of
ifconfig -a
netstat -nr
cat /proc/net/arp [this AFTER an unsuccessful ping]labeling them very clearly as to which is which.
At 01:46 PM 3/27/2004 +0300, Anton Martchukov wrote:
I did install a small PPP server on my home machine in order to play FreeCiv etc., but can't figure out why it refuses to run. According to pppd debug logs all goes right, here is the options I use for pppd:
auth -chap +pap login debug proxyarp ktune asyncmap 0 netmask 255.255.0.0 lock crtscts modem vhcastle:ppp ms-dns 192.168.1.1 mtu 576 mru 576 logfile /var/log/pppd.log
I use proxyarp and pppd tells that allright in logs:
found interface eth0 for proxy arp local IP address 192.168.1.1 (this is vhcastle) remote IP address 192.168.10.1 (this is ppp)
But anyway I can't ping remote machine, none of packets are sent thru the link, I've checked it with tcpdump. IP forwarding is enabled via sysctl.
ifconfig ppp0: ppp0 Link encap:Point-to-Point Protocol inet addr:192.168.1.1 P-t-P:192.168.10.1 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:576 Metric:1 RX packets:5 errors:0 dropped:0 overruns:0 frame:0 TX packets:5 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 RX bytes:102 (102.0 b) TX bytes:96 (96.0 b)
route on server: ppp * 255.255.255.255 UH 0 0 0 ppp0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 192.168.0.0 * 255.255.0.0 U 0 0 0 eth0 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
So, I completely stuck with this. Some points confusing me are NOARP for ppp0 in the output of ifconfig (is this a problem?). Also, I can't pinpoint where the net 169.254.0.0 is assigned to eth0 in configs, I did not specify it anywhere.
I use RedHat 9 (ASP 9) with pppd 2.4.2, same on the other end + KPPP from KDE 3.1. Any ideas will be greatly appreciated.
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