Date: Thu, 4 Jun 2009 12:48:21 -0600 (MDT) From: "Peter" <fbsdq@peterk.org> To: freebsd-questions@freebsd.org Subject: /etc/hosts - how does that file work?? - was weird nfs issues. Message-ID: <093ebf7d0b078a923d5690a42ef982e7.squirrel@webmail.pknet.net>
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iH,
This all started with NFS not mounting at boot....so, testing in VMs:
This is a fresh/generic install of 7.2-REL
no firewall
em1=10.21.20.0/24 network - DHCP for ssh access
client# uname -a
FreeBSD client.test 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May 1
08:49:13 UTC 2009
root@walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
client# cat /etc/rc.conf
gateway_enable="YES"
hostname="client.test"
ifconfig_em0="inet 172.20.6.2 netmask 255.255.255.0"
ifconfig_em0_alias0="inet 116.23.45.2 netmask 255.255.255.0"
ifconfig_em1="DHCP"
nfs_client_enable="YES"
nfs_server_enable="NO"
rpcbind_enable="NO"
sshd_enable="YES"
client# ifconfig em0|grep inet
inet 172.20.6.2 netmask 0xffffff00 broadcast 172.20.6.255
inet 116.23.45.2 netmask 0xffffff00 broadcast 116.23.45.255
client# cat /etc/hosts
::1 localhost localhost.test
127.0.0.1 localhost localhost.test
172.20.6.2 client.test client
116.23.45.2 client.test client
172.20.6.1 server.test server
116.23.45.3 server.test server
client# ping -c1 server
PING server.test (172.20.6.1): 56 data bytes
64 bytes from 172.20.6.1: icmp_seq=0 ttl=64 time=5.811 ms
--- server.test ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 5.811/5.811/5.811/0.000 ms
client# ssh -vvv server
OpenSSH_5.1p1 FreeBSD-20080901, OpenSSL 0.9.8e 23 Feb 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to server.test [116.23.45.3] port 22.
^C
client#
ssh to 'server' always goes to 116.23.45.3 IP
there is nothing on '116.23.45.3' IP
'116.23.45.3/24' is a made up network for testing
BUT...
client# ifconfig em0|grep inet
inet 172.20.6.2 netmask 0xffffff00 broadcast 172.20.6.255
inet 116.23.45.2 netmask 0xffffff00 broadcast 116.23.45.255
client# cat /etc/hosts
::1 localhost localhost.test
127.0.0.1 localhost localhost.test
172.20.6.2 client.test client
116.23.45.2 client.test client
172.20.6.1 server.test server
116.23.45.4 server.test server
client# ping -c1 server
PING server.test (172.20.6.1): 56 data bytes
64 bytes from 172.20.6.1: icmp_seq=0 ttl=64 time=0.285 ms
--- server.test ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.285/0.285/0.285/0.000 ms
client# ssh -vvv server
OpenSSH_5.1p1 FreeBSD-20080901, OpenSSL 0.9.8e 23 Feb 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to server.test [172.20.6.1] port 22.
debug1: Connection established.
...
......
Why if the secondary entry is higher than '116.23.45.3' it always goes to
172/24 network?
Why is ping using one IP, and ssh/mount_nfs/showmount using another IP
from /etc/hosts?
]confused[
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