Re: Setting up SMTP for outbound mail only

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

Good question. I have no control over the firewall so can't say how it is
configured. I will ask tomorrow. Is that required for outbound, inbound,
or both?

Both.

I found the following regarding UDP 53 and am wondering what your thoughts
are on this. Namely, if I open it will it be a security risk?

http://www.auditmypc.com/port/udp-port-53.asp

EXCERPT:

Domain Name Server (DNS).DNS servers offer different services on TCP and
UDP. TCP is used for "zone transfers" of full name record databases, while
UDP is used for individual lookups. Security Concerns: Zone Transfers give
away entire network maps; high value to attackers. - DNS (BIND) is a popular
target, since DNS servers must exist, must be reachable, and exploits
usually result DOS or root. Keep BIND version/patches current (refer to
www.isca.org). Use "split-DNS"


.

Relevant Pages

  • Re: Win2K DNS cannot query BIND 9
    ... All of their queries are UDP. ... I even opened service-any from their DNS servers and it ...
    (microsoft.public.win2000.dns)
  • RE: DNS ACL ?
    ... and there should be no zone transfers coming in ... from the internet to these servers. ... Subject: DNS ACL? ... > Not all DNS clients automatically try to negotiate bigger UDP ...
    (Pen-Test)
  • Re: How to send the data from 1 process more process using sockets!
    ... When you say "port" are you talking about the port that ... The source port of UDP datagrams on the server ... Have the clients connect to all servers. ... Have the servers connect to each other and pass client information ...
    (comp.os.linux.development.apps)
  • Intermittent UDP Failures
    ... I am having intermittent UDP failures on multiple servers. ... application that tests a stream locally on the servers using the ... Media Services log are that everything is fine. ...
    (microsoft.public.windowsmedia.server)
  • Re: [usenet] UDP status?
    ... I thought y'all might be interested in seeing that a UDP (Usenet Death ... Penalty) has been applied to certain servers for not taking a pro-active ... being used for floods, but apparently willing to solve the issue. ... still being used for floods, never replied to complaints (6 ...
    (rec.skydiving)