ASG
IBM
Zystems
Cressida
Icon
Netflexity
 
  MQSeries.net
Search  Search       Tech Exchange      Education      Certifications      Library      Info Center      SupportPacs      LinkedIn  Search  Search                                                                   FAQ  FAQ   Usergroups  Usergroups
 
Register  ::  Log in Log in to check your private messages
 
RSS Feed - WebSphere MQ Support RSS Feed - Message Broker Support

MQSeries.net Forum IndexWebSphere Message Broker SupportHow does ACE work with "reverse IP lookup" ?

Post new topicReply to topic
How does ACE work with "reverse IP lookup" ? View previous topic :: View next topic
Author Message
hunghip95
PostPosted: Mon Jan 04, 2021 2:00 am Post subject: How does ACE work with "reverse IP lookup" ? Reply with quote

Apprentice

Joined: 12 Oct 2017
Posts: 30

Hi all,

Scenario:
- I'm trying to disable "Reverse IP Lookup".
- ACE is running on AIX OS.
- There is a Client (10.0.81.52) calls to ACE'service (10.0.81.53:7800/service/vn/authen/authensvcs/1).
- There is no entry in both DNS Server and /etc/hosts.
- To disable "Reverse IP Lookup", my idea is using "cache forever" for unsuccessful IP in IBM JVM.

Action:

- I configured the java.security:

Code:
networkaddress.cache.ttl=-1

networkaddress.cache.negative.ttl=-1


- I used mqsichangeproperties:

Code:
mqsichangeproperties ACE11NODE -e MainServer -o ComIbmJVMManager -n jvmSystemProperty -v "-Dsun.net.inetaddr.negative.ttl=-1"


- MainServer was restarted.

Problem:

- It seems not to cache the "unsuccessful IP".
- It still lookup IP in DNS Server. I captured by using tcpdump:
https://drive.google.com/file/d/1SH9PPsMO25sHkmg-kIohq-MJRm838GBV/view?usp=sharing
- This is the whole captured file:
https://drive.google.com/file/d/1XrDOFAzmsddedvNTuJli9xiZpwBqp4wN/view?usp=sharing

Question:

- What is the purpose of "Reverse IP Lookup" ? Is it for System Logging or something else ?
- How to disable "Reverse IP Lookup" ?
- Why doesnt my configuration work ?


Thank you very much.
Back to top
View user's profile Send private message
Display posts from previous:
Post new topicReply to topic Page 1 of 1

MQSeries.net Forum IndexWebSphere Message Broker SupportHow does ACE work with "reverse IP lookup" ?
Jump to:



You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Protected by Anti-Spam ACP


Theme by Dustin Baccetti
Powered by phpBB 2001, 2002 phpBB Group

Copyright MQSeries.net. All rights reserved.