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my company's exchange site pulls up via all connection types EXCEPT my simple comcast home connection

For 2-3 months now I've had this annoying problem.

From my hot Comcast cable connection here at home, I cannot connect to https://owa.mycompany.com/exchange via Mac/Firefox, my default browser, nor will it pull up with Safari.  

At the same moment I CANNOT pull up OWA, I CAN pull up normal sites like Google, CNN and Yahoo.

Review -

I CANNOT get OWA via MacBook Pro/Firefox/Comcast
I CAN get OWA via Mac/XPParallels-IE/Comcast (what I call the XP side of my mac)
I CAN get OWA via Mac/Firefox/Comcast/VPN'd thru my Comcast connection (we use Cisco VPN)
I CAN get OWA via Mac/Firefox/Verizon V640 Aircard
I CAN get OWA via Mac/Firefox/Verizon V640 Aircard/VPN'd.
I CAN get OWA via Mac/Firefox/Sprint Sierra Wireless Compass 597 (new since yesterday)

I've checked my mac parental controls thinking owa was being blocked there, but it is not, is empty.

I also completely bypassed my Linksys WRT300N gateway (plugged my Mac directly into cable modem), again, can get other websites, but not OWA.  

My Firefox's proxy settings are all empty-blank (I'm not sure what else to check).

I also logged on for a very time onto my neighbor's unsecure "NETGEAR" WiFi and I cannot pull OWA up that way either, so there must be some setting in my Mac hindering OWA, but allowing OWA site when connected thru Aircard(s) & VPN tunnels.

A fix here will sever 1 more tie to Microsoft, because the simply fix for me is to jump over to XP side when running Parallels & get my email via comcast and IE.

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3 Solutions
LegendZMPrincipal Security ArchitectCommented:
if you open terminal, can you ping owa.yourcompany.com?  can you do an nslookup owa.yourcompany.com?
evanmcnallyIT ConsultantCommented:
I am also thinking it's a DNS problem...LegendZM beat me to the post ;-)

Just to add one thing even if ping and nslookup work, verify that the IP address they list for your OWA server is the same when using comcast vs. using one of the cellular cards.  The server address when on VPN will probably be different, so don't compare that.

On a side note, when you get OWA working, you might want to try Entourage 2008 rather than OWA.  Entourage actually interfaces with the OWA site on your server, but presents you with a very nice interface that is more like the Microsoft Outlook program.

jayindy1Author Commented:
nslookup owa.mycompany.com from my wired comcast connection does give me
a "Server:" IP, and an "Address:" IP (same but with #53" I assume a port number?

I also get a "Non-authoritative answer:" "Name:" "owa.mycompany.com" with "Address:" with an IP I'm familiar with, I've seen before, with the exception of the 4th octtet? (the last group of numbers is different, so ok, I can ping the IP no problem, so I did try putting the IP in the URL brower line and I got a login screen, but I must have goof something up, I thought I was good with the ip, but now I'm back to square 1, no love.

2. I did write down the DNS IP I had success with via the cell card, so I added that IP after the 2 IPs that appear by default when wired with comcast....still nothing.

I think I was close however.  When I did put in the IP, it  was asking about the certificate, I may have answered wrong when I thought it was going to work with the IP it gave me with nslookup, the IP that look familiar, looks similar to IP seen when using my VPN

In xp seems like there was lmlookup, sams, or some file that lived in windows sys directory that I could add name & IP address, is this something I could do somewhere in mac?

I think you've got me going in the right direction...any more suggestions?
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LegendZMPrincipal Security ArchitectCommented:
there should be a HOSTS file on a mac as well. http://practice.chatserve.com/hosts.html

jayindy1Author Commented:
ok, with additional help from google, I see I need to go to my applications, utilities and get into netinfo, but on my osx lepoard, I have no netinfo folder.

I've got to run gents, I've got a good start here, and with this link below maybe someone out there can get me started...I think I need to simply add IP with name something like " owa.mycompany.com" and I'm good to go?


Like everything else, it is going to take time, more time than most, for me to figr out,
LegendZMPrincipal Security ArchitectCommented:
In the hosts file just make an entry like

IP address dnsname.domain.com

and you're good to go. :)
jayindy1Author Commented:
Finally cracked this nut thanks for your help.

I'm familiar with lmhosts in the Microsoft OS, and you lead me to Mac's "/etc/hosts" file.  

After giving myself write permission, I added "XXX.XXX.XX.XXX owa.mycompany.com" with "pico /etc/hosts", then pico save commands (ctrl-x, y, enter) & as you mention, I'm good to go, yes is working excellently this morning pulling up OWA everytime.

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