Работает модем минут 15 до часа и потом начинает мигать лампочка ADSL, пока не отключишь питание. Потом опять проходит минут 15 и опять начинает мигать ADSL.
Если постоит ночь, то может связь держать часа 3. Потом все повторяется.
Что может быть?


2640U bru c
прошивка 1.25

Вышлите записи системного журнала.

Если отключить питание, лог стирается?
System Log


Date/Time Facility Severity Message
Jan 1 00:00:31 user crit kernel: ADSL G.992 message exchange
Jan 1 00:00:32 user crit kernel: ADSL link down
Jan 1 00:00:33 user crit kernel: ADSL G.994 training
Jan 1 00:00:41 user crit kernel: ADSL G.992 started
Jan 1 00:00:45 user crit kernel: ADSL G.992 channel analysis
Jan 1 00:00:52 user crit kernel: ADSL G.992 message exchange
Jan 1 00:00:53 user crit kernel: ADSL link up, interleaved, us=509, ds=2048
Jan 1 00:00:56 daemon crit pppd[388]: PPP server detected.
Jan 1 00:00:56 daemon crit pppd[388]: PPP session established.
Jan 1 00:00:56 daemon crit pppd[388]: PPP LCP UP.
Jan 1 00:00:57 daemon crit pppd[388]: Received valid IP address from server. Connection UP.
Jan 1 00:01:03 daemon err user: No server certificate found. Skip checking on certificate.
Jan 1 00:01:05 daemon err user: tr69c: Unable to retrieve attributes in scratch PAD
Jan 1 00:01:05 daemon err user: Stored Parameter Attribute data is corrupt or missing
Jan 1 00:01:26 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=76.107.115.132 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=114 ID=17458 DF PROTO=TCP SPT=60025 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:01:26 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.158.220.194 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=122 ID=30910 DF PROTO=TCP SPT=50389 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:01:29 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=76.107.115.132 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=114 ID=17481 DF PROTO=TCP SPT=60025 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:01:29 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.158.220.194 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=122 ID=30913 DF PROTO=TCP SPT=50389 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:01:35 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=76.107.115.132 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=114 ID=17508 DF PROTO=TCP SPT=60025 DPT=80 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:01:59 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=85.76.185.168 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=120 ID=37770 DF PROTO=TCP SPT=49183 DPT=16201 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:04:28 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=194.0.206.18 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=121 ID=54373 DF PROTO=TCP SPT=62839 DPT=14767 WINDOW=16384 RES=0x00 SYN URGP=0
Jan 1 00:04:31 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=194.0.206.18 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=121 ID=54623 DF PROTO=TCP SPT=62839 DPT=14767 WINDOW=16384 RES=0x00 SYN URGP=0
Jan 1 00:04:37 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=194.0.206.18 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=121 ID=55186 DF PROTO=TCP SPT=62839 DPT=14767 WINDOW=16384 RES=0x00 SYN URGP=0
Jan 1 00:06:44 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=94.20.118.177 DST=178.68.201.143 LEN=60 TOS=0x00 PREC=0x00 TTL=56 ID=24249 DF PROTO=TCP SPT=2422 DPT=23 WINDOW=5808 RES=0x00 SYN URGP=0
Jan 1 00:09:41 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.24.45.179 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=245 ID=20553 DF PROTO=TCP SPT=50370 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:09:44 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.24.45.179 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=245 ID=20706 DF PROTO=TCP SPT=50370 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:09:50 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.24.45.179 DST=178.68.201.143 LEN=48 TOS=0x00 PREC=0x00 TTL=245 ID=21632 DF PROTO=TCP SPT=50370 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:11:14 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=92.100.189.128 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=124 ID=37710 DF PROTO=TCP SPT=1197 DPT=35940 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:11:17 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=92.100.189.128 DST=178.68.201.143 LEN=52 TOS=0x00 PREC=0x00 TTL=124 ID=37870 DF PROTO=TCP SPT=1197 DPT=35940 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:20:20 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=190.40.162.6 DST=178.68.201.143 LEN=60 TOS=0x00 PREC=0x00 TTL=49 ID=38570 DF PROTO=TCP SPT=3162 DPT=23 WINDOW=5808 RES=0x00 SYN URGP=0
Jan 1 00:30:55 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=217.118.79.21 DST=178.68.201.143 LEN=52 TOS=0x08 PREC=0x00 TTL=118 ID=36118 DF PROTO=TCP SPT=16166 DPT=15606 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:37:17 user crit kernel: ADSL link down
Jan 1 00:37:21 daemon crit pppd[388]: Clear IP addresses. Connection DOWN.
Jan 1 00:37:21 daemon crit pppd[388]: Clear IP addresses. PPP connection DOWN.
Jan 1 00:37:28 user crit kernel: ADSL G.994 training
Jan 1 00:37:36 user crit kernel: ADSL G.992 started
Jan 1 00:37:41 user crit kernel: ADSL G.992 channel analysis
Jan 1 00:37:47 user crit kernel: ADSL G.992 message exchange
Jan 1 00:37:48 user crit kernel: ADSL link down
Jan 1 00:37:49 user crit kernel: ADSL G.994 training
Jan 1 00:37:58 user crit kernel: ADSL G.992 started
Jan 1 00:38:02 user crit kernel: ADSL G.992 channel analysis
Jan 1 00:38:08 user crit kernel: ADSL G.992 message exchange
Jan 1 00:38:08 user crit kernel: ADSL link up, interleaved, us=509, ds=2048
Jan 1 00:38:12 daemon crit pppd[388]: PPP server detected.
Jan 1 00:38:12 daemon crit pppd[388]: PPP session established.
Jan 1 00:38:12 daemon crit pppd[388]: PPP LCP UP.
Jan 1 00:38:13 daemon crit pppd[388]: Received valid IP address from server. Connection UP.
Jan 1 00:38:17 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=109.251.209.210 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=123 ID=24093 DF PROTO=TCP SPT=52391 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:18 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=80.80.199.184 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=118 ID=8200 DF PROTO=TCP SPT=50452 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:20 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=109.251.209.210 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=123 ID=24241 DF PROTO=TCP SPT=52391 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:21 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=80.80.199.184 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=118 ID=8447 DF PROTO=TCP SPT=50452 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:27 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.69.194.166 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=122 ID=16613 DF PROTO=TCP SPT=56499 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:27 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=80.80.199.184 DST=178.68.209.199 LEN=48 TOS=0x00 PREC=0x00 TTL=118 ID=8862 DF PROTO=TCP SPT=50452 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:30 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=95.69.194.166 DST=178.68.209.199 LEN=52 TOS=0x00 PREC=0x00 TTL=122 ID=17209 DF PROTO=TCP SPT=56499 DPT=21958 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:32 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=77.211.164.202 DST=178.68.209.199 LEN=56 TOS=0x18 PREC=0x00 TTL=115 ID=26283 DF PROTO=TCP SPT=58990 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:38:32 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=187.210.140.162 DST=178.68.209.199 LEN=48 TOS=0x00 PREC=0x00 TTL=118 ID=38990 DF PROTO=TCP SPT=1529 DPT=80 WINDOW=64512 RES=0x00 SYN URGP=0
Jan 1 00:40:39 user crit kernel: ADSL link down
Jan 1 00:40:39 daemon crit pppd[388]: Clear IP addresses. Connection DOWN.
Jan 1 00:40:40 daemon crit pppd[388]: Clear IP addresses. PPP connection DOWN.
Jan 1 00:40:49 user crit kernel: ADSL G.994 training
Jan 1 00:40:58 user crit kernel: ADSL G.992 started
Jan 1 00:41:02 user crit kernel: ADSL G.992 channel analysis
Jan 1 00:41:09 user crit kernel: ADSL link down
Jan 1 00:41:11 user crit kernel: ADSL G.994 training
Jan 1 00:41:19 user crit kernel: ADSL G.992 started
Jan 1 00:41:23 user crit kernel: ADSL G.992 channel analysis
Jan 1 00:41:30 user crit kernel: ADSL G.992 message exchange
Jan 1 00:41:30 user crit kernel: ADSL link up, interleaved, us=509, ds=2048
Jan 1 00:41:33 daemon crit pppd[388]: PPP server detected.
Jan 1 00:41:35 daemon crit pppd[388]: PPP session established.
Jan 1 00:41:35 daemon crit pppd[388]: PPP LCP UP.
Jan 1 00:41:36 daemon crit pppd[388]: Received valid IP address from server. Connection UP.
Jan 1 00:41:39 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=178.68.150.67 DST=95.52.164.161 LEN=52 TOS=0x00 PREC=0x00 TTL=125 ID=3862 DF PROTO=TCP SPT=54117 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:42 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=195.22.107.165 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=120 ID=10471 DF PROTO=TCP SPT=63533 DPT=6881 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:41:42 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=178.68.150.67 DST=95.52.164.161 LEN=52 TOS=0x00 PREC=0x00 TTL=125 ID=3947 DF PROTO=TCP SPT=54117 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:43 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=178.155.61.124 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=116 ID=12208 DF PROTO=TCP SPT=47735 DPT=41680 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:45 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=195.22.107.165 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=120 ID=10516 DF PROTO=TCP SPT=63533 DPT=6881 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:41:48 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=178.68.150.67 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=125 ID=4132 DF PROTO=TCP SPT=54117 DPT=6881 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:51 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=195.22.107.165 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=120 ID=10638 DF PROTO=TCP SPT=63533 DPT=6881 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:41:52 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=189.172.119.95 DST=95.52.164.161 LEN=52 TOS=0x00 PREC=0x00 TTL=119 ID=32064 DF PROTO=TCP SPT=13872 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:53 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=187.171.113.255 DST=95.52.164.161 LEN=48 TOS=0x00 PREC=0x00 TTL=119 ID=10937 DF PROTO=TCP SPT=1702 DPT=80 WINDOW=65535 RES=0x00 SYN URGP=0
Jan 1 00:41:54 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=176.109.184.252 DST=95.52.164.161 LEN=52 TOS=0x00 PREC=0x00 TTL=122 ID=1714 DF PROTO=TCP SPT=50752 DPT=41680 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:41:55 user alert kernel: Intrusion -> IN=ppp_0_0_35_1 OUT= MAC= SRC=189.172.119.95 DST=95.52.164.161 LEN=52 TOS=0x00 PREC=0x00 TTL=119 ID=32071 DF PROTO=TCP SPT=13872 DPT=443 WINDOW=8192 RES=0x00 SYN URGP=0
Jan 1 00:42:21 user crit kernel: ADSL link down
Jan 1 00:42:24 daemon crit pppd[388]: Clear IP addresses. Connection DOWN.
Jan 1 00:42:24 daemon crit pppd[388]: Clear IP addresses. PPP connection DOWN.

Обрывы dsl являются следствием большого количества входящих SYN - запросов.
Если Вы не используете р2р клиенты( например торрент) с большим количеством одновременных соединений, то причина в SYN-флуде.
Если используете р2р клиент - уменьшите одновременное количество соединений в нём, если нет, то обратитесь к провайдеру( средствами модема решить проблему не получится).

Спасибо.
Если установить программный фаервол , он может помочь?
Или все таки обращаться к провайдеру?

Программный фаервол не поможет, поскольку будет расположен за роутером.

В самом роутере тоже нельзя настроить? Вроде там был фаервол
Или может другую модель роутера посоветуете?

Нет, на роутере настроить нельзя.
К сожалению из линейки NRU нет более устойчивого к SYN-флуду устройства.