> > Well, after some time, I have returned to this matter. > > I have done one more test that I think is is conclusive. As I said, this > Debian GNU/Linux firewall PC has two network cards: > > * eth0: RealTek RTL8139 (to the ADSL router) > * eth1: VIA Rhine II (to the local network) > > The problem was with the RTL8139 card connected to the router. This only > worked when setting up it to 10 Mbps. The VIA card connected to the > switch of the local network never gave problems. > > So I now exchanged the configuration of the cards. Now the eth0 Realtek > card connects to the internal network. It runs smoothly at 100 Mbps, > full duplex and auto negotiation. So I think it was not a problem with > the Realtek card. In fact, now the VIA card (that previously worked > properly connected to the internal network switch) only works against > ADSL router when it is set to 10 Mbps. > > All this makes me think the problem is in the ethernet interface of the > ADSL router. > > I have requested a new router to Telefonica. I hope they send me a good > one. This Zyxel router worked smoothly for quite some time. I also hope > it have a default password to access the router and make the necessary > settings (such as SNMP monitoring). > > > Thanks for your reply. > > Kind regards, > Daniel >
Try installing "firmware-realtek" package to solve the original problem. Regards.
