Здравтсвуйте!
Заранее спасибо!

Имеется проблема, модем рвет соединение раз в несколько минут, потом правда оно само поднимается, но это не решает проблемы. Линк стабильный. В логах следующие…

Oct 16 21:01:50 daemon info pppd[281]: No response to 3 echo-requests
Oct 16 21:01:50 daemon notice pppd[281]: Serial link appears to be disconnected.
Oct 16 21:01:50 daemon info pppd[281]: Connect time 6.5 minutes.
Oct 16 21:01:50 daemon info pppd[281]: Sent 532889 bytes, received 20439944 bytes.
Oct 16 21:01:51 daemon warn pppd[281]: Couldn't increase MRU to 1500
Oct 16 21:01:57 daemon notice pppd[281]: Connection terminated....
Oct 16 21:02:00 daemon info pppd[281]: Sent PADT
Oct 16 21:02:10 daemon info pppd[281]: PPP session is 58887
Oct 16 21:02:10 daemon info pppd[281]: Using interface ppp0_1_32_1
Oct 16 21:02:10 daemon notice pppd[281]: Connect: ppp_0_1_32_1 <--> nas_0_1_32
Oct 16 21:02:10 daemon warn pppd[281]: Couldn't increase MRU to 1500
Oct 16 21:02:12 daemon notice pppd[281]: PAP authentication succeeded
Oct 16 21:02:12 daemon notice pppd[281]: peer from calling number 00:16:47:CC:0B:30 authorized
Oct 16 21:02:12 daemon notice pppd[281]: local IP address 89.163.x.x
Oct 16 21:02:12 daemon notice pppd[281]: remote IP address 1.1.3.1
Oct 16 21:02:12 daemon notice pppd[281]: primary DNS address 195.131.84.245
Oct 16 21:02:12 daemon notice pppd[281]: secondary DNS address 194.8.160.90
Oct 16 21:02:14 user debug syslog: route add default gw 1.1.3.1 2>/dev/null
Oct 16 21:02:15 user debug syslog: iptables -A FORWARD -o ppp_0_1_32_1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
Oct 16 21:02:15 user debug syslog: iptables -A FORWARD -i ppp_0_1_32_1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
Oct 16 21:02:16 user debug syslog: iptables -t nat -D POSTROUTING -o ppp_0_1_32_1 -s 192.168.0.0/255.255.255.248 -j MASQUERADE 2>/dev/null
Oct 16 21:02:16 user debug syslog: iptables -t nat -A POSTROUTING -o ppp_0_1_32_1 -s 192.168.0.0/255.255.255.248 -j MASQUERADE
Oct 16 21:02:10 user debug syslog: iptables -I INPUT 1 -p tcp --dport 80 -i ppp_0_1_32_1 -j ACCEPT
Oct 16 21:02:10 user debug syslog: iptables -I INPUT 1 -p icmp --icmp-type echo-request -i ppp_0_1_32_1 -j ACCEPT
Oct 16 21:02:10 user debug syslog: iptables -I INPUT 1 -p tcp --dport 23 -i ppp_0_1_32_1 -j ACCEPT
Oct 16 21:04:31 user notice dnsprobe[498]: Switching Back To Primary DNS server
Oct 16 21:08:42 daemon info pppd[281]: No response to 3 echo-requests
Oct 16 21:08:42 daemon notice pppd[281]: Serial link appears to be disconnected.
Oct 16 21:08:42 daemon info pppd[281]: Connect time 7 minutes.
Oct 16 21:08:42 daemon info pppd[281]: Sent 554638 bytes, received 21238544 bytes.
Oct 16 21:08:43 daemon warn pppd[281]: Couldn't increase MRU to 1500
Oct 16 21:08:50 daemon notice pppd[281]: Connection terminated....
Oct 16 21:08:54 daemon info pppd[281]: Sent PADT
Oct 16 21:09:04 daemon info pppd[281]: PPP session is 60488
Oct 16 21:09:04 daemon info pppd[281]: Using interface ppp0_1_32_1
Oct 16 21:09:04 daemon notice pppd[281]: Connect: ppp_0_1_32_1 <--> nas_0_1_32
Oct 16 21:09:04 daemon warn pppd[281]: Couldn't increase MRU to 1500
Oct 16 21:09:06 daemon notice pppd[281]: PAP authentication succeeded
Oct 16 21:09:06 daemon notice pppd[281]: peer from calling number 00:16:47:CC:0B:30 authorized
Oct 16 21:09:06 daemon notice pppd[281]: local IP address 89.163.x.x
Oct 16 21:09:06 daemon notice pppd[281]: remote IP address 1.1.3.1
Oct 16 21:09:06 daemon notice pppd[281]: primary DNS address 195.131.84.245
Oct 16 21:09:06 daemon notice pppd[281]: secondary DNS address 194.8.160.90
Oct 16 21:09:11 user debug syslog: route add default gw 1.1.3.1 2>/dev/null
Oct 16 21:09:11 user debug syslog: iptables -A FORWARD -o ppp_0_1_32_1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
Oct 16 21:09:12 user debug syslog: iptables -A FORWARD -i ppp_0_1_32_1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
Oct 16 21:09:12 user debug syslog: iptables -t nat -D POSTROUTING -o ppp_0_1_32_1 -s 192.168.0.0/255.255.255.248 -j MASQUERADE 2>/dev/null
Oct 16 21:09:12 user debug syslog: iptables -t nat -A POSTROUTING -o ppp_0_1_32_1 -s 192.168.0.0/255.255.255.248 -j MASQUERADE
Oct 16 21:09:14 user debug syslog: iptables -I INPUT 1 -p tcp --dport 80 -i ppp_0_1_32_1 -j ACCEPT
Oct 16 21:09:14 user debug syslog: iptables -I INPUT 1 -p icmp --icmp-type echo-request -i ppp_0_1_32_1 -j ACCEPT
Oct 16 21:09:14 user debug syslog: iptables -I INPUT 1 -p tcp --dport 23 -i ppp_0_1_32_1 -j ACCEPT