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[uml-user] Uml/networking/newbie? issue
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From: Frederic B. <Fre...@wa...> - 2003-08-11 14:15:34
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Hi all,
Im new to uml (networking as well).
I experience difficulties pinging the host, and testing many different commands from the doc,
Ive been unable to make it work.
Pinging the host from uml doesnt work, neither pinging the uml from host.
So that Im wondering if my host/uml's kernel is missing some networking options...
Thanks for your help
Some infos you may need :
->The facts
Host$ ping 192.168.1.25
PING 192.168.1.25 (192.168.1.25) 56(84) bytes of data.
From 192.168.1.2 icmp_seq=1 Destination Host Unreachable
From 192.168.1.2 icmp_seq=2 Destination Host Unreachable
..
[eth0 from uml receiving : RX bytes:18512 (18.0 KiB) and transmitting TX bytes:18512 (18.0 KiB)]
Uml$ ping 192.168.1.2
PING 192.168.1.2 (192.168.1.2): 56 data bytes
-nothing-
[tap0 receiving : RX bytes:4508 (4.4 Kb) but not transmitting ]
->Ips
Host's gateway=192.168.1.1
Host=192.168.1.2
Uml =192.168.1.25
->Kernel's versions
Host: Linux blackbox 2.6.0-test2-mm5 #1 SMP Sun Aug 10 00:45:47 CEST 2003 i686 AMD Athlon(tm) MP 2200+ AuthenticAMD GNU/Linux
Uml: Linux (none) 2.6.0-test2-1um #8 Sun Aug 10 23:00:39 CEST 2003 i686 unknown
->Host's kernel networking options:
--
# Networking support
#
CONFIG_NET=y
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_NETLINK_DEV=m
CONFIG_UNIX=y
CONFIG_NET_KEY=m
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_MULTIPLE_TABLES is not set
# CONFIG_IP_ROUTE_MULTIPATH is not set
# CONFIG_IP_ROUTE_TOS is not set
CONFIG_IP_ROUTE_VERBOSE=y
# CONFIG_IP_PNP is not set
CONFIG_NET_IPIP=m
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
CONFIG_INET_ECN=y
CONFIG_SYN_COOKIES=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
#
# ARCnet devices
#
# CONFIG_ARCNET is not set
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
CONFIG_ETHERTAP=m
# CONFIG_NET_SB1000 is not set
--
->Uml's kernel networking options:
--
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_NETLINK_DEV=y
# CONFIG_NETFILTER is not set
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_ARPD is not set
# CONFIG_INET_ECN is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_IPV6 is not set
# CONFIG_XFRM_USER is not set
--
->Misc
host# ls -l /dev/net/tun
crw-rw-rw- 1 root users 10, 200 Aug 11 13:12 /dev/net/tun
->Boot : unpriviledged user runs :
/linux ubd0=Debian-3.0r0.ext2 ubd1=swap_fs root=/dev/ubd/0 eth0=tuntap,,,192.168.1.2
..blabla...
Setting up IP spoofing protection: rp_filter.
Configuring network interfaces: * insmod tun
Can't open 'tun': No such file or directory
* ifconfig tap0 192.168.1.2 netmask 255.255.255.255 up
* bash -c echo 1 > /proc/sys/net/ipv4/ip_forward
* route add -host 192.168.1.25 dev tap0
* bash -c echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
* arp -Ds 192.168.1.25 eth0 pub
done.
Host$ lsmod |grep tun
tun 8064 1
->Interfaces:
Uml$ cat /etc/network/interfaces
# Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
# /usr/share/doc/ifupdown/examples for more information.
auto lo eth0
iface lo inet loopback
iface eth0 inet static
address 192.168.1.25
network 192.168.1.0
netmask 255.255.255.0
broadcast 192.168.1.255
gateway 192.168.1.2
Uml$ ifconfig
eth0 Link encap:Ethernet HWaddr FE:FD:C0:A8:01:19
inet addr:192.168.1.25 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:1008 (1008.0 b)
Interrupt:5
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:12 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:960 (960.0 b) TX bytes:960 (960.0 b)
Host$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:50:DA:3C:26:77
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:12853 errors:0 dropped:0 overruns:0 frame:0
TX packets:12316 errors:0 dropped:0 overruns:0 carrier:0
collisions:12 txqueuelen:100
RX bytes:7526841 (7.1 Mb) TX bytes:1238261 (1.1 Mb)
Interrupt:11 Base address:0xd000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1402 (1.3 Kb) TX bytes:1402 (1.3 Kb)
tap0 Link encap:Ethernet HWaddr 00:FF:3C:7B:ED:20
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:36 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1008 (1008.0 b) TX bytes:0 (0.0 b)
->Routing
Host$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.25 0.0.0.0 255.255.255.255 UH 0 0 0 tap0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
Uml$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 192.168.1.2 0.0.0.0 UG 0 0 0 eth0
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