I've got a really strange one here, I hope someone else has seen this before
cause it is ruining my business and driving me NUTS!!!!
My RH firewall has been rock solid stable for months and I havent been fooling
around with anything. Around 2 weeks ago I started getting this wierd problem.
My modem would appear to lose connection with my ISP (I'm on a static dial up
account) even though ppp0 is still up and the modem lights show things as normal.
What *really* gets me is that the firewall starts blocking traffic that is
from my server going outbound, but this traffic is coming on the INPUT chain
from ppp0 !!!!! It's almost as if my modem is bouncing all my outgoing
traffic back to my firewall. Of course, the firewall suspects someone is
spoofing my IP addresses and DENY's the packets.
My ISP has done traces on their routers and the only traffic they see is
packets being sent out to me but they get no replies back like I have disappeared.
At this time I notice that an ifconfig on ppp0 shows I am getting framing
errors on the RX channel. They steadily increase which suggests to me that
they are a symptom caused by the link going down and not the cause of the
failure itself.
If I 'ifdown ppp0' and 'ifup ppp0' (or turn the modem off and then back on
again) then the modem will happily dial up again and reestablish
communications. Everything is fine then. It fails again anywhere from 2
minutes later to 2-3 days later - very unpredictable although I get bad
patches where it fails EVERY 2 minutes...
I've replaced modems with a new one. Same deal.
I've swapped serial ports on the firewall. Same deal.
I've swapped physical phone cable to wall socket. Same deal.
I'm currently using my home phone line and it seems ok but I'll bet it will
happen again.
Has ANYONE seen anything like this before???
--
Regards,
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| Peter Kiem | E-Mail : <[EMAIL PROTECTED]> |
| Zordah IT | Mobile : +61 0414 724 766 |
| IT Consultancy & | WWW : www.zordah.net |
| Internet Hosting | ICQ : "Zordah" 866661 |
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