telnet dropout

Jagadesh_2 — Wed, 23 Nov 2005 08:47:16 GMT

Hi All,

How to check if telnet sessions from 10.7.224 network are being dropped out of HPUX server host for any reason. Is there any monitoring tool for that.
I checked on syslog.log but i cannot find any telnet dropout errors logged in that.

Thanks in advance
S.Jagadesh

Re: telnet dropout

Jagadesh_2 — Wed, 23 Nov 2005 08:57:26 GMT

Please find the o/p of netstat -s.
netstat -s
tcp:
1314717426 packets sent
722547386 data packets (2031507362 bytes)
2744442 data packets (457349278 bytes) retransmitted
595069401 ack-only packets (50555103 delayed)
0 URG only packets
363626 window probe packets
2904495 window update packets
23002116 control packets
1167982148 packets received
4230802379 acks (for 2042276581 bytes)
23542637 duplicate acks
344 acks for unsent data
389994291 packets (2382276173 bytes) received in-sequence
975 completely duplicate packets (549046 bytes)
7210 packets with some dup, data (9832356 bytes duped)
76816 out of order packets (77744355 bytes)
230 packets (1846696643 bytes) of data after window
13874 window probes
1198676598 window update packets
4381 packets received after close
6382 segments discarded for bad checksum
0 bad TCP segments dropped due to state change
2320680 connection requests
8495210 connection accepts
10815890 connections established (including accepts)
13772593 connections closed (including 969087 drops)
960435 embryonic connections dropped
4217384963 segments updated rtt (of 4217384963 attempts)
890359 retransmit timeouts
59100 connections dropped by rexmit timeout
363626 persist timeouts
2047414 keepalive timeouts
2044447 keepalive probes sent
256 connections dropped by keepalive
0 connect requests dropped due to full queue
22768 connect requests dropped due to no listener
udp:
0 incomplete headers
0 bad checksums
0 socket overflows
ip:
351204168 total packets received
0 bad IP headers
0 fragments received
0 fragments dropped (dup or out of space)
0 fragments dropped after timeout
0 packets forwarded
0 packets not forwardable
icmp:
30366 calls to generate an ICMP error message
0 ICMP messages dropped
Output histogram:
echo reply: 21876
destination unreachable: 8490
source quench: 0
routing redirect: 0
echo: 0
time exceeded: 0
parameter problem: 0
time stamp: 0
time stamp reply: 0
address mask request: 0
address mask reply: 0
0 bad ICMP messages
Input histogram:
echo reply: 847
destination unreachable: 19802
source quench: 0
routing redirect: 0
echo: 21934
time exceeded: 352
parameter problem: 0
time stamp request: 0
time stamp reply: 0
address mask request: 0
address mask reply: 0
21876 responses sent
igmp:
0 messages received
0 messages received with too few bytes
0 messages received with bad checksum
0 membership queries received
0 membership queries received with incorrect fields(s)
0 membership reports received
0 membership reports received with incorrect field(s)
0 membership reports received for groups to which this host belongs
0 membership reports sent

Re: telnet dropout

Steven E. Protter — Wed, 23 Nov 2005 09:37:25 GMT

Shalom Jagadesh,

I suggest the following tools:

tcpdump

Fairly easy to use simple man page.

ethereal

Available as part of Internet Express at software.hp.com

11i v1
http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=HPUXIEXP1111

11i v2
http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=HPUXIEXP1123

SEP

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