Understanding my recurrent network connectivity problems
in [Debian]
|
Prev: Trouble using debmirror on Lenny (certain public keysnot found)
Next: Compiling kernel took a lot of disk space.
From: green on 26 Jun 2010 11:20 lee wrote at 2010-06-26 09:28 -0500: > On Sat, Jun 26, 2010 at 09:11:11AM +0200, Merciadri Luca wrote: > > According to my pings (see last messages), the router looks like > > overwhelmed, and is thus completely crappy. I don't know why it happens > > now. I am still wondering why. > DHCP with these routers usually sucks, as well as the nameservers > built into them do. Someone mentioned DD-WRT; that would probably be a good thing to try IF your router is supported. My experience with routers suggests that usually a router's software is more of a problem than the hardware. http://www.dd-wrt.com/site/support/router-database
From: Andrew McGlashan on 26 Jun 2010 12:00 Hi, lee wrote: > See if the problem persists. If it does, replace the modem. Installing > squid on your computer and configuring shorewall so that your computer > acts as a transparent proxy for all the computers on your LAN is a > good idea. You might want to go further and set up your computer to > provide email services to the computers on your LAN. Setups with > dyndns --- if you can't get a static IP --- work reasonably well to > receive your email directly. That frees you a great deal from the > usually ridiculous limits email service providers impose on their > users and greatly speeds up and easyfies things for the users on the > LAN. Umm, to run a proper mail server, you wouldn't and probably shouldn't be able to use a dynamic IP. The MX record for mail must have a "real" A record that has a fixed IP; and that A record's IP should have a proper reverse DNS -- anything less and you'll have all sorts of trouble sending / receiving mail directly from / to your own mail server. -- Kind Regards AndrewM Andrew McGlashan Broadband Solutions now including VoIP -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4C2622A9.8090706(a)affinityvision.com.au
From: Merciadri Luca on 26 Jun 2010 13:10 lee wrote: > On Sat, Jun 26, 2010 at 09:11:11AM +0200, Merciadri Luca wrote: > > > To figure this out, it's a good idea to simplify things first: > > > * use static IPs on all the computers connected to the LAN and turn > off the DHCP server in the router if possible > > * connect the switch to the router as the only device connected to the > router and plug all the computers into the switch instead > Already done. > After these steps, see if the problem persists. If it persists: > > > * unplug the router, plug your computer directly into the modem, set > up your computer for making the connection to your ISP > Everything works great, if so. > * plug the switch into a second network card in your computer, the > other computers connected to the switch > Eh, I don't have a second NC. > * set up a firewall on your computer, using, for example, shorewall, > and configure it so that your computer basically replaces the router > > * set up a name server on your computer to operate as a name server > for all the computers on your LAN > > > See if the problem persists. If it does, replace the modem. Installing > squid on your computer and configuring shorewall so that your computer > acts as a transparent proxy for all the computers on your LAN is a > good idea. You might want to go further and set up your computer to > provide email services to the computers on your LAN. Setups with > dyndns --- if you can't get a static IP --- work reasonably well to > receive your email directly. That frees you a great deal from the > usually ridiculous limits email service providers impose on their > users and greatly speeds up and easyfies things for the users on the > LAN. > > DHCP with these routers usually sucks, as well as the nameservers > built into them do Thanks. Today, everything worked perfectly. If it lags at one moment, I'll try other stuff. Thanks. -- Merciadri Luca See http://www.student.montefiore.ulg.ac.be/~merciadri/ I use PGP. If there is an incompatibility problem with your mail client, please contact me. Many receive advice; only the wise profit from it.
From: lee on 26 Jun 2010 13:10 On Sun, Jun 27, 2010 at 01:54:17AM +1000, Andrew McGlashan wrote: > > Umm, to run a proper mail server, you wouldn't and probably > shouldn't be able to use a dynamic IP. > > The MX record for mail must have a "real" A record that has a fixed > IP; and that A record's IP should have a proper reverse DNS -- > anything less and you'll have all sorts of trouble sending / > receiving mail directly from / to your own mail server. You can use the email server of your provider as a smarthost to send the outgoing mail while still receiving it directly. I'm not saying it's ideal, and I'd rather have a static IP, but it can work reasonably well. I didn't say anything about outgoing mail in my previous post :) -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/20100626170316.GA4677(a)yun.yagibdah.de
From: Erwan David on 26 Jun 2010 13:30
Le Sat 26/06/2010, lee disait > On Sun, Jun 27, 2010 at 01:54:17AM +1000, Andrew McGlashan wrote: > > > > Umm, to run a proper mail server, you wouldn't and probably > > shouldn't be able to use a dynamic IP. > > > > The MX record for mail must have a "real" A record that has a fixed > > IP; and that A record's IP should have a proper reverse DNS -- > > anything less and you'll have all sorts of trouble sending / > > receiving mail directly from / to your own mail server. > > You can use the email server of your provider as a smarthost to send > the outgoing mail while still receiving it directly. I'm not saying > it's ideal, and I'd rather have a static IP, but it can work > reasonably well. I didn't say anything about outgoing mail in my > previous post :) receiving directly needs a MX record, which needs a static IP because of DNS caches You may get what you want if you find a service provider which provides UUCP or ETRN for your domain. -- Erwan -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/20100626172455.GA2683(a)rail.eu.org |