by I am trying to connect an apple mac to a linux pc which is connected to
the internet via an ADSL line. My ultimate goal is using the pc as a
gateway so they can share this connection. But I am already in trouble
making the two speak to each other.
My problem is the following: the two machines are connected via
ethernet, the linux box is 192.168.0.1, the mac is 192.168.0.2. They can
ping each other, but the mac fails to connect to any service I try to
provide on the pc. For instance, when I try to ftp the linux box from
the mac, the linux box does not react at all; logging packets that
arrive from the mac gives
Nov 20 12:42:25 linux kernel: IN=eth0 OUT=
MAC=a5:a5:a5:a5:a5:a5:00:50:e4:80:30:20:08:00 SRC=192.168.0.2
DST=192.168.0.1 LEN=84 TOS=0x00 PREC=0x00 TTL=255 ID=38775 DF PROTO=ICMP
TYPE=0 CODE=0 ID=60677 SEQ=2
Nov 20 12:43:01 linux kernel: IN=eth0 OUT=
MAC=a5:a5:a5:a5:a5:a5:00:50:e4:80:30:20:08:00 SRC=192.168.0.2
DST=192.168.0.1 LEN=48 TOS=0x00 PREC=0x00 TTL=255 ID=38776 DF PROTO=TCP
SPT=2050 DPT=21 WINDOW=16616 RES=0x00 SYN URGP=0
Nov 20 12:43:07 linux kernel: IN=eth0 OUT=
MAC=a5:a5:a5:a5:a5:a5:00:50:e4:80:30:20:08:00 SRC=192.168.0.2
DST=192.168.0.1 LEN=48 TOS=0x00 PREC=0x00 TTL=255 ID=39043 DF PROTO=TCP
SPT=2050 DPT=21 WINDOW=16616 RES=0x00 SYN URGP=0
Nov 20 12:43:21 linux kernel: IN=eth0 OUT=
MAC=a5:a5:a5:a5:a5:a5:00:50:e4:80:30:20:08:00 SRC=192.168.0.2
DST=192.168.0.1 LEN=48 TOS=0x00 PREC=0x00 TTL=255 ID=39044 DF PROTO=TCP
SPT=2050 DPT=21 WINDOW=16616 RES=0x00 SYN URGP=0
etc.
which makes me think the mac does try to connect. On the other hand,
doing
ftp 192.168.0.1 on the pc works fine.
Thinking appletalk would be a more "natural" service to provide to a
mac, I installed netatalk on my linux box. The the same applies here: in
the chooser, the mac does not see the linux box, and when I explicitly
give in the address 192.168.0.1, it tries to connect but fails in much
the same way as ftp fails.
I do not know what to do next... Has any of you got a clue?
Some more information on my configuration: the linux box runs suse 7.2
with a patched (I applied the PPPoATM patch) 2.4.4 kernel. The output of
some commands:
#ifconfig
eth0 Link encap:Ethernet HWaddr A5:A5:A5:A5:A5:A5
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
EtherTalk Phase 2 addr:65280/251
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:34 errors:0 dropped:0 overruns:0 frame:0
TX packets:55 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:2520 (2.4 Kb) TX bytes:3762 (3.6 Kb)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
EtherTalk Phase 2 addr:0/0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:732 errors:0 dropped:0 overruns:0 frame:0
TX packets:732 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:51817 (50.6 Kb) TX bytes:51817 (50.6 Kb)
ppp0 Link encap:Point-to-Point Protocol
inet addr:217.136.22.178 P-t-P:217.136.16.1
Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:573 errors:0 dropped:0 overruns:0 frame:0
TX packets:647 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:143310 (139.9 Kb) TX bytes:41317 (40.3 Kb)
#netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
217.136.16.1 0.0.0.0 255.255.255.255 UH 40 0 0
ppp0
192.168.0.0 0.0.0.0 255.255.255.0 U 40 0 0
eth0
0.0.0.0 217.136.16.1 0.0.0.0 UG 40 0 0
ppp0
#arp -n
Address HWtype HWaddress Flags
Mask Iface
192.168.0.2 ether 00:50:E4:80:30:20
C eth0
#iptables --list -n
Chain INPUT (policy ACCEPT)
target prot opt source destination
LOG all -- 192.168.0.2 0.0.0.0/0 LOG flags 0
level 4
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
LOG all -- 0.0.0.0/0 192.168.0.2 LOG flags 0
level 4
The file hosts.allow contains only ALL:ALL, and hosts.deny is empty.
The mac's TCP/IP control panel is set up as follows:
IP Address: 192.168.0.2
Subnet mask: 255.255.255.0
Router address: 192.168.0.1
All the other boxes are empty.