Date: Mon, 18 May 2015 16:20:50 -0700 From: Jeffry Killen <jekillen@prodigy.net> To: Charles Swiger <cswiger@mac.com> Cc: FreeBSD - <freebsd-questions@freebsd.org> Subject: Re: looking at manual page for rc.conf Message-ID: <D7159A26-2AD8-409F-AF7C-47451DCF7088@prodigy.net> In-Reply-To: <7DCD8F5E-4995-4A65-921C-FA5F8AE4671A@mac.com> References: <C6FF7256-86A8-4364-980A-96E1DEFE37B1@prodigy.net> <7DCD8F5E-4995-4A65-921C-FA5F8AE4671A@mac.com>
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On May 18, 2015, at 1:51 PM, Charles Swiger wrote: > On May 18, 2015, at 1:37 PM, Jeffry Killen <jekillen@prodigy.net> > wrote: >> I am looking at the manual page for rc.conf and am wondering >> how I would specify default router address when using DHCP? > > Normally one doesn't need to do so; DHCP is supposed to configure > that for you. > >> I don't see any further explicit elucidations beyond the text >> quoted below. >> >> text from man page: >> >> It is possible to bring up an interface with DHCP by adding >> ``DHCP'' to the ifconfig_<interface> variable. >> For instance, to initialize the ed0 device via DHCP, it is possible >> to use something like: >> ifconfig_ed0="DHCP" >> >> actually, I have >> ifconfig_em0="DHCP" >> Is the router address something that DHCP will figure out? > > Yes. > >> This interface will be for connection to internet via DSL modem >> ISP is CenturyLink. >> >> or alternately, suppose I want to assign a static address to >> interface >> that would connect to internet via DSL modem. >> ifconfig_em0="inet 192.168.0.4 netmask 255.255.255.0" >> When the router is at 192.168.0.1, how would this be specified. > > Add: defaultrouter="192.168.0.1" ...to /etc/rc.conf. > >> I have also looked at ifconfig(8) and have not found anything. > > ifconfig(8) sets up an interface; route(8) manages routing. > >> I have also had the kernel complain via a shell script set to >> run in The last was text I started and abandoned and neglected to remove. sorry. roughly, "run by cron every 11 minutes because I had what amounted to commands in rc.conf, or syntax interpreted as commands. That issue was resolved long ago. It sent e-mails to root every 11 minutes complaining about what appeared to be a unrelated issue. >> >> I am also concerned about setting up tcp wrappers with inetd >> to forestal possible attempts to access via telnet, ssh, ftp and >> even MySql server (as I have seen frequently when I had static >> ip address service). > > tcp wrappers typically only affects services launched by inetd, which > doesn't normally include SSH or MySQLd. I did have entries in tcp wrappers config (name escapes me now) and/or inetd.conf for ssh and mysql, as I recall. > >> This I have done when I did have static ip >> service. But with fire wall in DSL modem and DHCP configuration >> is it useful and advantageous? > > Yes, even a local per-host firewall improves security by a useful > amount. > > Regards, > -- > -Chuck Thank you for your time attention and response JK
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