Error: cannot route packet - please help

[Johannes Lode]

Hi,

I´m fighting with a silly problem: my syslog tells me tinc cannot route
a packet. I can use a telnet or the good ol ping, it is the same effect.

When I´m pinging from the laptop (172.16.11.2) the network address
(172.16.11.0) or any address numerically lower than the laptops address,
the packet gets routed, otherwise not. And when I ping the network
address, I get the reply twice, as to be expected. When I ping from the
server (172.16.11.254) the return packet from 172.16.11.2 to
172.16.11.254 doesn´t get routed.

My first setup is quite simple:
one host at home, with dynDNS and a laptop using a dial up connection

the host at home:

tinc-up (works fine):
#!/bin/sh
ifconfig tap0 down
ifconfig tap0 hw ether fe:fd:00:00:00:00
ifconfig tap0 172.16.11.254 broadcast 172.16.11.255 netmask
255.255.255.0
ifconfig tap0 -arp

tinc.conf:
Name = janus
Hostnames = no
KeyExpire = 3600
PingTimeout = 60
PrivateKeyFile = /etc/tinc/p21.net/rsa_key.priv
TapDevice = /dev/tap0

/sbin/ifconfig tap0
tap0      Link encap:Ethernet  HWaddr FE:FD:00:00:00:00
          inet addr:172.16.11.254  Bcast:172.16.11.255
Mask:255.255.255.0
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:33 errors:0 dropped:0 overruns:0 frame:0
          TX packets:46 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          Interrupt:5


the laptop
tinc-up:
#!/bin/sh
ifconfig tap0 down
ifconfig tap0 hw ether fe:fd:00:00:00:00
ifconfig tap0 172.16.11.2 broadcast 172.16.11.255 netmask 255.255.255.0
ifconfig tap0 -arp

tinc.conf:
Name = ghost
ConnectTo = janus
Hostnames = no
KeyExpire = 3600
PingTimeout = 60
PrivateKeyFile = /etc/tinc/p21.net/rsa_key.priv
TapDevice = /dev/tap0

/sbin/ifconfig tap0
tap0      Link encap:Ethernet  HWaddr FE:FD:00:00:00:00
          inet addr:172.16.11.2  Bcast:172.16.11.255  Mask:255.255.255.0

          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:1152 (1.1 Kb)
          Interrupt:5


the syslog of the laptop:
Jun  1 01:12:05 ghost tinc.p21.net[1377]: Read packet of length 98 from
tap device
Jun  1 01:12:05 ghost tinc.p21.net[1377]: Cannot route packet: unknown
destination address 172.16.11.254
Jun  1 01:19:23 ghost tinc.p21.net[1377]: Subnet list:
Jun  1 01:19:23 ghost tinc.p21.net[1377]:  1,ac100b00/ffffff00 owner
janus
Jun  1 01:19:23 ghost tinc.p21.net[1377]:  1,ac100b02/ffffffff owner
ghost
Jun  1 01:19:23 ghost tinc.p21.net[1377]: End of subnet list.

on both hosts:
hosts/janus:
Address = janus.xxx.yyy.org
Port = 655
Subnet = 172.16.11.0/24
-----BEGIN RSA PUBLIC KEY-----
xxx
-----END RSA PUBLIC KEY-----

hosts/ghost:
Port = 655
Subnet = 172.16.11.2/32
-----BEGIN RSA PUBLIC KEY-----
xxx
-----END RSA PUBLIC KEY-----

thank´s for help

Johnny


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