[lug] open port

[John Karns]

On Thu, 28 Mar 2002, Jeff said:

> HI folks,
> Quick questions here.  I run a (very) small mail server out of my
> house.  When I send mail to most every body, within seconds, I get hits
> on port 113 on my machine; port 113, according to /etc/services, is
> Authentication Service.  Right now, my firewall rules, say just to deny
> (ignore) any hits on that port.  My questions are this:
> 1.  Should I leave the rules as they are?
> 2.  Are there any security holes in it, if I open the port?
> 3.  Is there a good reason for keeping the port closed or opening it?