191 lines
3.4 KiB
HTML
191 lines
3.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>( PORTFW ) - IP Masquerading with PORTFWing seems to break when my line
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is idle for long periods</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux IP Masquerade HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Frequently Asked Questions"
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HREF="faq.html"><LINK
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REL="PREVIOUS"
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TITLE="( Performance ) - IP Masquerading seems slow"
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HREF="masq-performace.html"><LINK
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REL="NEXT"
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TITLE="( PORTFW - Locally ) - I can't reach my PORTFWed server from the INTERNAL lan"
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HREF="portfw-local.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux IP Masquerade HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="masq-performace.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 7. Frequently Asked Questions</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="portfw-local.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="PORTFW-ISSUES"
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></A
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>7.18. ( PORTFW ) - IP Masquerading with PORTFWing seems to break when my line
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is idle for long periods</H1
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><P
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>If you have a DSL or Cablemodem, this behavior is unfortunately quite common.
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Basically your ISP is putting your connection into a very low priority queue
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to better service non-idle connections. The problem is that some enduser's
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connections will actually be taken OFFLINE until some traffic from the user's
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DSL/Cablemodem connection awakens the ISP's hardware.</P
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><P
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><P
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></P
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><UL
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><LI
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><P
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>Some DSL installations can take an idle connection OFFLINE and only be checked
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for activity once every 30 seconds or so. </P
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></LI
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><LI
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><P
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>Some Cablemodem setups can set an idle connection into a low priority queue
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and only be checked for activity every minute or so.</P
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></LI
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></UL
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></P
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><P
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>What do I recommend to do? Ping your default gateway every 30 seconds. To
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do this, edit the /etc/rc.d/rc.local file and add the following to the bottom
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of the file:</P
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><P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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> ping -i 30 100.200.212.121 > /dev/null &</PRE
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></FONT
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></TD
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></TR
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></TABLE
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></P
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><P
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>Replace the 100.200.212.121 with your default router (upstream router).</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="masq-performace.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="portfw-local.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>( Performance ) - IP Masquerading seems slow</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="faq.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>( PORTFW - Locally ) - I can't reach my PORTFWed server from the INTERNAL lan</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |