PK78451: WEB SERVER PLUG-IN FOR WEBSPHERE APPLICATION SERVER NOW SUPPORTS TRUSTED PROXIES AS FRONT END TO WEB SERVERS.

Fixes are available

APAR status

Closed as new function.

Error description

Web Server Plug-in for WebSphere Application Server did not
permit Proxies, Load Balancers and other front-end Network
devices to modify the Remote Address($WSRA) and
Remote Host($WSRH).

This function is required when network devices front-ending a
Web Server performs Network Address Translation.

Local fix

Problem summary

****************************************************************

* USERS AFFECTED: All users of Web server Plug-in V6.1 and     *
*                 V7.0 for WebSphere Application Server. Web   *
*                 server Plug-in now supports Trusted Proxies  *
*                 as a front-end to the Web server/Plug-in.    *
****************************************************************
* PROBLEM DESCRIPTION: The plug-in did not permit network      *
*                      devices such as Proxies and Load        *
*                      Balancers to modify remote client IP    *
*                      address.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Web server Plug-in does not permit network devices front-ending
Web server/Plug-in to override WebSphere private headers
$WSRA - Remote client IP Address and $WSRH - Remote Client
Hostname. This prevents getRemoteIP() and getRemoteHost()
calls in WebSphere Application Server from returning the
modified address.

The plug-in did not permit network devices such as Proxies and
Load Balancers to modify remote client IP address.
Modification may be necessary if the device does Network
Address Translation(NAT) and an application hosted by
WebSphere Application Server requires the NAT'ed address.
Since the Plug-in did not permit the modification, WebSphere
Application Server's getRemoteHost() and getRemoteIP()
returned incorrect data for such applications that require the
NAT'ed address.

Problem conclusion

The Plug-in now provides an enhancement to support Trusted

Proxies.
A list of Trusted Proxy servers is created as a
comma-separated list via a WebSphere custom property
"TrustedProxyList".  Another custom property
"TrustedProxyEnable" is needed with value srt to TRUE.
Re-generation plugin-cfg.xml creates a version that supports
Trusted Proxies.

The Trusted Proxy are allowed to provide the NAT'ed address
via the WebSphere private headers "$WSRA" and "$WSRH". The
customer should be sure to set RemoveSpecialHeaders="false"
to preserve the headers added.

The enhancement is included in Fix Packs 7.0.0.3 and 6.1.0.23
Please refer to the Recommended Updates page for delivery
information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PK78451
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-01-12
Closed date
2010-01-20
Last modified date
2010-01-20

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R61A PSY
UP
R61H PSY
UP
R61I PSY
UP
R61P PSY
UP
R61S PSY
UP
R61W PSY
UP
R61Z PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK78451: WEB SERVER PLUG-IN FOR WEBSPHERE APPLICATION SERVER NOW SUPPORTS TRUSTED PROXIES AS FRONT END TO WEB SERVERS.

Fixes are available

Subscribe

APAR status

Closed as new function.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R61A PSY

R61H PSY

R61I PSY

R61P PSY

R61S PSY

R61W PSY

R61Z PSY

Document Information

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