Seeing a strange problem exhibited after a recent dist-upgrade of an
We see connections hanging when connecting to port 25 running on the
2.6.26 kernel version.
Running a tcpdump on the server shows that a syn packet is received, but
there's no ack or anything. Using the etch kernel doesn't cause this
issue either, which negates any issue with exim, iptables or named and
I'm wondering if there's been any changes to the tcp/ip stack or the way
the kernel handles syn cookies etc..
The server is under heavy utilization, so I'm wondering if we're
tripping an arbitrary value somewhere in /proc ?
Any tips greatly appreciated!
Systems Administrator, Zen Internet
T: 0845 058 9000
F: 0845 058 9005
Eliminate downtime and improve performance with award winning Hosting from Zen Internet
Please consider your environmental responsibility before printing this e-mail
Zen Internet is ISO 14001:2004 Registered
This email is confidential, may be legally privileged or otherwise protected from disclosure, and is sent for the attention of the intended recipient. If you are not the intended recipient of this email; please contact the sender and delete it from your system; you must not copy, reproduce, disclose to any other person, or otherwise use the contents of it or any attachment. Copyright in documents created by or on behalf of Zen Internet Limited remains vested in Zen Internet Limited.
Zen Internet Limited is registered in England and Wales
Sandbrook Park, Sandbrook Way, Rochdale OL11 1RY
Company No. 03101568
VAT Reg No. 686 0495 01
To UNSUBSCRIBE, email to debian-isp-REQUEST@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact firstname.lastname@example.org