Strange networking problems after update 5.2.1->5.3

[GerritKühn]

Hi folks,

I recently updated my old Compaq Armada 1500c from 5.2.1 to 5-stable. 5.2.1
worked fine, the update went without any noticable problem according to the
docs. 5.3 behaves well apart from a strange networking problem.
The notebook lives in a /16 subnet with a /16 netmask and has a 16bit
NE2000 PCMCIA-card (Longshine).

Things that do work:
- ping to hosts in /24
- ssh to hosts in /24
- nis with a server in /24

Things that don't work:
- ping from any host
- ping to hosts outside /24
- nfs
- query dns in /16
- connecting ntp server in /16

My networking setup hasn't changed, netmask and everything are ok (and
worked before the update). I don't use any kind of filtering.
Even a portscan from a machine in /24 connected to the same switch doesn't
show a single thing. The packets are received by the notebook (I see the
LED of the card flashing), but ping -f doesn't create any noticable irq
load. netstat doesn't show any running daemons, though e.g. ssh and lpd are
definitely running.

I definitely don't have a clue what is going on here... anyone else?


cu
  Gerrit
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