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</div><div id="yui_3_16_0_1_1445886937994_11765" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11767" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">I have openswan 2.6.37(using NETKEY) on Ubuntu-12.04.2 <span class="" id="yui_3_16_0_1_1445886937994_11769" style="mso-spacerun:yes"> </span></span></div>
<div id="yui_3_16_0_1_1445886937994_11771" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11773" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11775" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11777" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">I’m experimenting with various MTU sizes by adding MTU=value
to conn of ipsec.conf</span></div>
<div id="yui_3_16_0_1_1445886937994_11779" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11781" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11783" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11785" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">It seems the only place to modify MTU is at function
_iface_up() of openswan-2.6.37/lib/libipsecconf/virtif.c</span></div>
<div id="yui_3_16_0_1_1445886937994_11787" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11789" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">Line 188:<span class="" id="yui_3_16_0_1_1445886937994_11791" style="mso-tab-count:1"> </span>ioctl(sock,
SIOCSIFMTU, &req);</span></div>
<div id="yui_3_16_0_1_1445886937994_11793" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11795" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11797" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11799" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">Question 1: I put some fprintf(stderr,..) statements and
found that _iface_up() function is never called – is <span class="" id="yui_3_16_0_1_1445886937994_11801" style="mso-spacerun:yes"></span>that correct?</span></div>
<div id="yui_3_16_0_1_1445886937994_11803" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11805" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11807" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11809" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">Question 2: However, if the _iface_up() function is called,
then who calls it after MTU=value triggers from conn of ipsec.conf? </span></div>
<div id="yui_3_16_0_1_1445886937994_11811" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11813" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11815" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11817" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">Appreciate the explanation.</span></div>
<div id="yui_3_16_0_1_1445886937994_11819" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11821" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman""> </span></div>
<div id="yui_3_16_0_1_1445886937994_11823" class="" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><span class="" id="yui_3_16_0_1_1445886937994_11825" style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman"">Ted</span></div>
<div id="yui_3_16_0_1_1445886937994_11827" class=""><span class="" id="yui_3_16_0_1_1445886937994_11829" style="font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif""> </span></div><div dir="ltr">
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