Look at the "samba" port, itīll receive packets on the ports most virused microsoft
clients send to random destination addresses.
Pete
Colin Watson wrote:
Hi, I've got a rather strange issue with UDP loss (at least I think it is) on my network, and frankly - I'm not sure it's me (think it might be the upstream providers stuff). Basically, the situation is this, FreeBSD 4.8 box connects to the upstream provider, and another one at another location acts as a gateway for the customers. The gateway box has very high 'drops' on it's UDP sockets, making streaming stuff awful - and output of netstat -s (UDP,TCP & IP only) on the gateway box is shown at the end of this post. My particular concern is these lines in the UDP output "41738 datagrams received / 33104 broadcast/multicast datagrams dropped due to no socket " which seems an inordinatly high amount. There are no drops due to full socket buffers, although I have recompiled the kernel with nmbclusters=8192 and Maxusers=1024 (to increase number of available sockets - kern.ipc.maxsockets to 9391), still the loss occurs. Any suggestions, and could someone explicitly explain what "broadcast/multicast datagrams dropped due to no socket" means.
Many Thanks
Colin.
---> Output of netstat -s on Gateway Box ----->
tcp:
40102 packets sent
14837 data packets (1080215 bytes)
23 data packets (29468 bytes) retransmitted
0 resends initiated by MTU discovery
17949 ack-only packets (669 delayed)
0 URG only packets
0 window probe packets
6924 window update packets
370 control packets
46602 packets received
10485 acks (for 1080288 bytes)
227 duplicate acks
0 acks for unsent data
31029 packets (31656794 bytes) received in-sequence
132 completely duplicate packets (177030 bytes)
0 old duplicate packets
9 packets with some dup. data (3920 bytes duped)
7375 out-of-order packets (9107920 bytes)
0 packets (0 bytes) of data after window
0 window probes
11 window update packets
0 packets received after close
0 discarded for bad checksums
0 discarded for bad header offset fields
0 discarded because packet too short
182 connection requests
14 connection accepts
0 bad connection attempts
0 listen queue overflows
190 connections established (including accepts)
258 connections closed (including 1 drop)
19 connections updated cached RTT on close
19 connections updated cached RTT variance on close
9 connections updated cached ssthresh on close
5 embryonic connections dropped
9539 segments updated rtt (of 9546 attempts)
9 retransmit timeouts
0 connections dropped by rexmit timeout
0 persist timeouts
0 connections dropped by persist timeout
0 keepalive timeouts
0 keepalive probes sent
0 connections dropped by keepalive
1 correct ACK header prediction
27603 correct data packet header predictions
15 syncache entries added
1 retransmitted
0 dupsyn
0 dropped
14 completed
0 bucket overflow
0 cache overflow
1 reset
0 stale
0 aborted
0 badack
0 unreach
0 zone failures
0 cookies sent
0 cookies received
udp:
41738 datagrams received
0 with incomplete header
0 with bad data length field
0 with bad checksum
0 with no checksum
8443 dropped due to no socket 33104 broadcast/multicast datagrams dropped due to no socket <-- My Particular Concern
0 dropped due to full socket buffers
0 not for hashed pcb
191 delivered
254 datagrams output
ip:
28432403 total packets received
9 bad header checksums
0 with size smaller than minimum
211 with data size < data length
0 with ip length > max ip packet size
0 with header length < data size
0 with data length < header length
0 with bad options
0 with incorrect version number
2585861 fragments received
0 fragments dropped (dup or out of space)
57 fragments dropped after timeout
1292902 packets reassembled ok
9414002 packets for this host
2 packets for unknown/unsupported protocol
17696404 packets forwarded (0 packets fast forwarded)
16337 packets not forwardable
0 packets received for unknown multicast group
0 redirects sent
15047419 packets sent from this host
0 packets sent with fabricated ip header
0 output packets dropped due to no bufs, etc.
26 output packets discarded due to no route
97835 output datagrams fragmented
195670 fragments created
0 datagrams that can't be fragmented
0 tunneling packets that can't find gif
0 datagrams with bad address in header
_______________________________________________
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
_______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
