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Modem-stretch/en: различия между версиями
Новая страница: «DNS server addresses are replaced with those that were received from the mobile provider. If you are using DHCP on the ethernet interfaces and the interface ppp0,…»
(Новая страница: «'''Important!''' By default, the ppp0 interface '''does not add a new default route via ppp during initialization''', if such a route exists and is configured, fo…») |
(Новая страница: «DNS server addresses are replaced with those that were received from the mobile provider. If you are using DHCP on the ethernet interfaces and the interface ppp0,…») |
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'''Important!''' By default, the ppp0 interface '''does not add a new default route via ppp during initialization''', if such a route exists and is configured, for example, via eth0. If required, you can modify the routing table through scripts in the ip-down.d, ip-up.d directories. In the simplest case, you can assign different metrics to the default gateways, so that if one falls, the second begins to be used. However, the situation, when the interface is operating normally but the traffic does not pass at the provider level, makes such a mechanism unusable. See the next section on how to use a ppp connection as a backup. | '''Important!''' By default, the ppp0 interface '''does not add a new default route via ppp during initialization''', if such a route exists and is configured, for example, via eth0. If required, you can modify the routing table through scripts in the ip-down.d, ip-up.d directories. In the simplest case, you can assign different metrics to the default gateways, so that if one falls, the second begins to be used. However, the situation, when the interface is operating normally but the traffic does not pass at the provider level, makes such a mechanism unusable. See the next section on how to use a ppp connection as a backup. | ||
DNS server addresses are replaced with those that were received from the mobile provider. If you are using DHCP on the ethernet interfaces and the interface ppp0, the /etc/resolv.the conf changes when a connection is established through each of these interfaces according to the DNS server addresses received from the provider. | |||
В качестве дополнительной меры повышения надежности при наличии двух соединений можно предложить использование DNS-серверов, не зависящих от провайдера, например GoogleDNS (8.8.8.8, 8.8.4.4) и OpenDNS (208.67.222.222, 208.67.220.220). Очень часто эти сервера используются для определения работоспособности сетевого канала по определенному интерфейсу (ping -c5 -I eth0 8.8.8.8 или ping -c5 -I ppp0 8.8.4.4). | В качестве дополнительной меры повышения надежности при наличии двух соединений можно предложить использование DNS-серверов, не зависящих от провайдера, например GoogleDNS (8.8.8.8, 8.8.4.4) и OpenDNS (208.67.222.222, 208.67.220.220). Очень часто эти сервера используются для определения работоспособности сетевого канала по определенному интерфейсу (ping -c5 -I eth0 8.8.8.8 или ping -c5 -I ppp0 8.8.4.4). | ||