Freebsd network

Configfiles

static

• /etc/rc.conf

hostname="free-willy"
ifconfig_re0="inet 10.82.11.100 netmask 255.255.0.0"
defaultrouter="10.82.0.1
#static routes
static_routes="vlan1 vlan2"
route_vlan1="-net 10.81.0.0/16 10.83.39.1"
route_vlan2="-net 10.82.0.0/16 10.83.39.2"

dhcp

• /etc/rc.conf

ifconfig_re0="DHCP"

Nameserver

• cat /etc/resolv.conf

search xinux.lan tuxmen.de
nameserver 10.80.0.2
nameserver 10.80.0.3

Manual

Interface

• ifconfig re1 10.83.39.1 netmask 255.255.255.0 up

Route

Net

• route add -net 10.81.0.0/16 10.83.39.254

Default

• route add default 10.84.254.1

Tools

TCP ports

• netstat -nl -p tcp

Active Internet connections
Proto Recv-Q Send-Q Local Address             Foreign Address                     (state)
tcp4       0      0 10.82.11.100.8472         10.81.1.11.50928                    ESTABLISHED

show routing table

• netstat -f inet -rn

Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            10.82.0.1          UGS         re0
10.82.0.0/16       link#1             U           re0
10.82.11.100       link#1             UHS         lo0
127.0.0.1          link#2             UH          lo0

sokstat

ipv4

• sockstat -4

USER     COMMAND    PID   FD PROTO  LOCAL ADDRESS         FOREIGN ADDRESS
root     sshd       671   3  tcp4   10.82.11.100:8472     10.81.1.11:52842
root     sendmail   609   3  tcp4   127.0.0.1:25          *:*
www      httpd      590   4  tcp4   *:80                  *:*
www      httpd      589   4  tcp4   *:80                  *:*
www      httpd      588   4  tcp4   *:80                  *:*
www      httpd      587   4  tcp4   *:80                  *:*
www      httpd      586   4  tcp4   *:80                  *:*
root     httpd      584   4  tcp4   *:80                  *:*
root     sshd       579   4  tcp4   *:8472                *:*
root     sshd       579   6  tcp4   *:22                  *:*
root     nfsd       512   5  tcp4   *:2049                *:*
root     mountd     506   7  udp4   *:993                 *:*
root     mountd     506   8  tcp4   *:993                 *:*
root     rpcbind    395   9  udp4   *:111                 *:*
root     rpcbind    395   10 udp4   *:818                 *:*
root     rpcbind    395   11 tcp4   *:111                 *:*
root     syslogd    386   7  udp4   *:514                 *:*
?        ?          ?     ?  udp4   *:2049                *:*

Links

• https://www.freebsd.org/doc/handbook/config-network-setup.html