| 1 |
Hi folks, |
| 2 |
|
| 3 |
Today I had some really serious problems with my Gentoo router. I |
| 4 |
could ping it, and all the network connections were in place and |
| 5 |
functional, but no outside access. I looked into it and found that |
| 6 |
the syslog was flooded with this: |
| 7 |
|
| 8 |
|
| 9 |
Mar 22 21:25:55 localhost kernel: nf_conntrack: table full, dropping packet. |
| 10 |
Mar 22 21:26:00 localhost kernel: printk: 11 messages suppressed. |
| 11 |
Mar 22 21:26:00 localhost kernel: nf_conntrack: table full, dropping packet. |
| 12 |
Mar 22 21:26:05 localhost kernel: printk: 16 messages suppressed. |
| 13 |
|
| 14 |
|
| 15 |
These messages spanned a full 20 hours of the log. I understand that |
| 16 |
conntrack is the connection tracking system that iptables uses. I |
| 17 |
also understand that its maximum is something on the order of 65000 |
| 18 |
simultaneous connections. For a simple home network, I think we can |
| 19 |
agree that I would probably never approach this number of connections |
| 20 |
with normal use. |
| 21 |
|
| 22 |
So my question is this: what could have caused the router's |
| 23 |
connection tracker to overflow? |
| 24 |
-- |
| 25 |
Dan Cowsill |
| 26 |
http://www.danthehat.net |
| 27 |
-- |
| 28 |
gentoo-user@l.g.o mailing list |
Archives