Craig, Firewall rules are processed independently of "netstat -nlu" output. You are correct that those commands would identify is a port is in use, but not if it is firewalled.
Thanks, Tom On Mon, Jul 1, 2013 at 10:54 AM, Craig Constantine <[email protected]> wrote: > Well, if you want to just verify the port is open, why not netstat with > (n)umeric, (l)istener and (u)dp flags? > eg, from a system with BIND on UDP/53 ... > > # netstat -nlu | grep -q :53 > # echo $? > 0 > # netstat -nlu | grep -q :54 > # echo $? > 1 > > --Craig Constantine, http://constantine.name > > > On Jul 1, 2013, at 10:48 AM, Alan Robertson <[email protected]> wrote: > > On 07/01/2013 07:53 AM, Tom Limoncelli wrote: >> Hi Rusty, >> >> That sounds great. Actually I'm looking for less user interface. I >> want to be able to call it from a Makefile to run unittests against a >> rule set before it goes into production. > My need is similar - I want to have an application that can complain if > my UDP port isn't open. Again, an exit code and maybe a message is just > fine for me. > > -- > Alan Robertson <[email protected]> - @OSSAlanR > > "Openness is the foundation and preservative of friendship... Let me claim > from you at all times your undisguised opinions." - William Wilberforce > _______________________________________________ > Discuss mailing list > [email protected] > https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss > This list provided by the League of Professional System Administrators > http://lopsa.org/ > > _______________________________________________ > Discuss mailing list > [email protected] > https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss > This list provided by the League of Professional System Administrators > http://lopsa.org/ -- Email: [email protected] Skype: YesThatTom Blog: http://EverythingSysadmin.com ⬤ . . : . ) ● ● ● ● _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
