Red Hat Bugzilla – Bug 77882
rlogin hangs the second time
Last modified: 2007-04-18 12:48:27 EDT
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User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt)
Description of problem:
rlogin to an aix system works 1 time, after logging out and logging in again
with rlogin it hangs.
After a very long time it works again.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.rlogin 22.214.171.124 -l johan
3.rlogin 126.96.36.199 -l johan
Actual Results: hangs in step 3
with netstat I found :
rlogin client on redhat uses the first time socket port 1023, after logging out
and logging in again with rlogin to the same system, it uses again socket port
1023 but hangs. Netstat gives as status on the port SYN_SENT.
Rlogin in another shell while the above connection hangs, works again 1 time,
this time with socket port 1022. After logging out and logging in again, hangs
again on socket port 1022, netstat gives again SYN_SENT.
To resume :
a recently used socket port to a certain system can't be used anymore for a
long amount of time to the same system. It can well be used to another system.
For example :
rlogin 188.8.131.52 -l johan
it works (netstat shows socket port 1023 is used)
ctrl-D to logout
rlogin 184.108.40.206 -l johan
it works, (netstat shows socket port 1023 is used again)
rlogin 220.127.116.11 would have hanged
ctrl-D to logout
rlogin again to 18.104.22.168 or 22.214.171.124 hangs now.
netstat gives SYN_SENT on port 1023
The "rlogin" use privileged ports (512-1023). The number of this ports
are limited and after terminated connection is some timeout when the
connection on port is in the TIME_WAIT state. I think your AIX server
hasn't free ports for new connection and you need to wait for
TIME_WAIT timeout from previous connection.
I think you can found something interesting in the server logs. I have
no idea where AIX has logs, but at linux it's in the file
No response. NEEDINFO -> CANTFIX
Since there are insufficient details provided in this report for us to
investigate the issue further, and we have not received the feedback we
requested, we will assume the problem was not reproduceable or has been fixed in
a later update for this product.
Users who have experienced this problem are encouraged to upgrade to the latest
update release, and if this issue is still reproduceable, please contact the Red
Hat Global Support Services page on our website for technical support options:
If you have a telephone based support contract, you may contact Red Hat at
1-888-GO-REDHAT for technical support for the problem you are experiencing.