http://kb.linux-vs.org/wiki?action=history&feed=atom&title=UDP_service_binding_issue_in_LVS%2FDR_and_LVS%2FTUN 2026-05-02T10:47:59Z Revision history for this page on the wiki MediaWiki 1.26.2 http://kb.linux-vs.org/wiki?title=UDP_service_binding_issue_in_LVS/DR_and_LVS/TUN&diff=4198&oldid=prev 2007-06-29T10:02:52Z

<p>‎<span dir="auto"><span class="autocomment">Problem</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;' lang='en'> <td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 10:02, 29 June 2007</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Problem ==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Problem ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>If [[real server]]s run UDP service binding with any address (0.0.0.0), the problem is that response packet will use the ip address of real server as source address, instead of the [[VIP]] address, and then it will break the service.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>If [[real server]]s run UDP service binding with any address (0.0.0.0), the problem is that response packet will use the ip address of real server as source address, instead of the [[VIP]] address, and then it will break the service<ins class="diffchange diffchange-inline">, because the client sends requests to the [[VIP]] address and expects responses from the [[VIP]] address too</ins>.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Solution ==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Solution ==</div></td></tr> </table>

Wensong http://kb.linux-vs.org/wiki?title=UDP_service_binding_issue_in_LVS/DR_and_LVS/TUN&diff=4019&oldid=prev 2007-05-28T15:38:35Z

<p>New page: == Problem == If <a href="/wiki/Real_server" title="Real server">real servers</a> run UDP service binding with any address (0.0.0.0), the problem is that response packet will use the ip address of real server as source address, instead...</p> <p><b>New page</b></p><div>== Problem ==<br /> <br /> If [[real server]]s run UDP service binding with any address (0.0.0.0), the problem is that response packet will use the ip address of real server as source address, instead of the [[VIP]] address, and then it will break the service.<br /> <br /> == Solution ==<br /> <br /> The quick solution is to get UDP service bind with the [[VIP]] address.<br /> <br /> == References ==<br /> <br /> * [http://archive.linuxvirtualserver.org/html/lvs-users/2004-08/msg00112.html LVS-DR UDP Service probem]<br /> <br /> [[Category:IPVS]]</div>

Wensong