On Wed, 2012-08-29 at 19:47 -0500, Dale Dellutri wrote: > On Wed, Aug 29, 2012 at 2:40 PM, Arthur Dent > <misc.lists@xxxxxxxxxxxxxxxx> wrote: > >... > > So here's the thing - and I don't remember having this problem with F15 > > (or previous): > > I can access my mail using a client on another machine in my network if > > I configure it to use 192.168.2.2, but for my mobile devices I configure > > the email client to point to example.org. If I am outside of my network > > they can access mail fine, but if I am at home and they are connecting > > via my own wi-fi... no joy... > > It looks like it has something to do with your home router. It seems to > be having trouble routing packets which are meant for itself but coming > from inside the lan. > > Do you have a SOHO router on your lan (separate from your server), or > is your home server also doing the NAT/NPT routing for your lan? > > When your mobile is at home, it has an IP addr on your lan: 192.168.2.6 > for example. When it sends something to example.org:993, it first uses > DNS to change it to an IP addr: 123.456.789.123 in your example. Then > it sends the request to the router to get to the internet. But that's the > router's own IP addr (because it IS example.org). So the router ought to > just use the request internally and deal with it correctly. > > If you have a separate SOHO router did it change lately? > > If your home server is the router, then, of course, it has changed, and > something isn't working properly. However, I can't help you any further > because I've never used a server as a router for a lan. > > (But note that your iptables output shows rules in the FORWARD chain, > but no packet traffic (those zeroes at the beginning of each line).) Hmmm.... I am still somewhat mystified. I have a Belkin F5D8233-4v3 wireless router which has not (as far as I know) been altered since I set it up 3-4 years ago. With all previous versions of Fedora it "just worked". Poking around in the settings I can see no option specifically to turn on or off NAT. However, whilst in there I decided to "reboot" the router. That *seems* to have done the trick. I am not wholly satisfied yet however. My main mobile device is an Apple iPhone 3GS. I find that now that I have rebooted the router I can sometimes access my mail from within my network (and the iPhone configuration obviously points to "example.org"), but with the standard Apple email client I often get a "checking for mail" message with the network activity icon rotating furiously, but no update of mail. Then sometimes it will work. I did NOT have this problem before. However, on the same phone I happen to have another email client (ibisMail) which (with exactly the same settings) works just fine... Since rebooting the router my wife's iPad also now seems to work fine. So I guess it was the router that was the problem and rebooting it seems to have fixed it. I need to look at my iPhone a bit more closely, but for the moment I think we have have solved this. Thank you to everyone who helped. I am not a newbie, but in many areas (networking especially!) my level of expertise is woefully inadequate and I really appreciate the helpful support I get from this mailing list. Mark
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