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voncloft
Tux's lil' helper
Tux's lil' helper


Joined: 29 Jan 2014
Posts: 99

PostPosted: Thu Jan 17, 2019 12:33 am    Post subject: Random losses of internet Reply with quote

I used the following guide to create my own linux router: https://wiki.gentoo.org/wiki/Home_router

It works great, but lately it has lost the WAN connection out of the blue.

My Lan still worked, I could still stream samba on my LAN - using VLC for video.

I came home from work and was unable to ping 8.8.8.8 on the box, none of my clients could either.

I tried restarting dhcpd, dnsmasq, tried restarting both the lan and the wan

iptables weren't blocking any thing

The only fix was to reboot my machine.

I have no idea where to look for the cause on why this happened, its the 2nd time within 3 weeks this has happened.

Can someone point me in the right direction, I don't even know if the syslog-ng logs would have anything.

I save all my syslog-ng files in: /var/log/backups/[date]/[hour] format. So far nothing is turning up when I use the following:

cat */* | grep -v enp4s0 | grep -v enp0s10 | grep -v wlp5s0 | grep error | grep -v "/var/log"

just a bunch of errors of smtp not being able to find googles smtp servers
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Tony0945
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Advocate


Joined: 25 Jul 2006
Posts: 3245
Location: Illinois, USA

PostPosted: Thu Jan 17, 2019 1:30 am    Post subject: Reply with quote

It sounds like your ISP dropped service. You should be able to ping 8.8.8.8
Is this cable internet? Do the lights on your cable modem look OK?
I can access my cable modem's web interface on xxxxxx (see below)
There I can see signal levels and view it's log.

EDIT: CORRECTION 198.168.0.1 is the router.
http://192.168.100.1/ is the cable modem.
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voncloft
Tux's lil' helper
Tux's lil' helper


Joined: 29 Jan 2014
Posts: 99

PostPosted: Thu Jan 17, 2019 10:22 am    Post subject: Reply with quote

At the time yes all the lights looked normal on the modem itself I have 5 lights the pattern was Green Blue, B, G, B

I was unable to ping 8.8.8.8.

Could this be a leasing problem with Comcast?

Why would a reboot of my "Linux Router" fix the problem?

Is there a way around the reboot?
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Tony0945
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Joined: 25 Jul 2006
Posts: 3245
Location: Illinois, USA

PostPosted: Thu Jan 17, 2019 4:06 pm    Post subject: Reply with quote

Can you get to the router log by the ip address I gave? Comcast may be using a different address. When my sister had Comcast they supplied (demanded actually) a combo router-modem-telephone adapter. It had a Class B address rather than a Class C address.
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voncloft
Tux's lil' helper
Tux's lil' helper


Joined: 29 Jan 2014
Posts: 99

PostPosted: Thu Jan 17, 2019 8:20 pm    Post subject: Reply with quote

Yes I can
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