Red Hat Bugzilla – Bug 30076
incoming telnet session very slow to start
Last modified: 2007-04-18 12:31:51 EDT
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User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0)
When attempting to telnet into the Linux system, it requires between 30-60
seconds for system to respond with "login" prompt. Once connection is
established, response time is OK.
Steps to Reproduce:
1. Telnet into system from NT/Win98 system.
Actual Results: After 30-60 seconds, system responds with
expected "login" prompt.
Expected Results: Login prompt should display in under 10 seconds.
It's trying to do a DNS lookup of where you're connecting from.
Make sure the server machine's DNS is configured correctly, and that the client
machine is resolvable.
We don't use DNS for name resolution; we use WINS. Is there any way to bypass
this feature (whatever it may be), or use WINS for name resolution? Security
isn't an issue, we're behind a firewall.
Could you please retry with:
Bonus: security fixes to the recently discovered vulnerabilities