Multi WAN seems to be poorly implemented
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Thx jimp.
What would happen in a load-balancing pfsense setup with two gateways with sticky enabled, if one gateway failed? What would prevent pf from remembering the old (finished) sessions tracks for src.track (e.g. 30 minutes) and keep sending traffic its way?
I am having in mind the issue raised in
http://lists.freebsd.org/pipermail/freebsd-pf/2006-December/002860.html
http://lists.freebsd.org/pipermail/freebsd-pf/2006-December/002861.htmlIn that example they suggest using pfctl -K to remove source tracking entries.
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I believe the way our multi-wan works none of that info applies, as it does some behind-the-scenes magic when a WAN fails that may be doing the right thing here already. Ermal would have to say for sure though.
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But what code does that checkbox execute?
Can I do something from the console….? -
To see the code, do a search, e.g.
fgrep lb_use_sticky /etc/inc/*
Basically it enables the "sticky-address" feature of pf.
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The code triggered by the checkbox to activate sticky can be found in /etc/inc/interfaces.inc
As for the GUI field to set the timeout manually, here is what does that:
https://github.com/bsdperimeter/pfsense/commit/4573641589d50718b544b778cea864cfd725078a -
I really ment…
can I write some value to some pseudo-file in /proc or doesn't it work that way?The checkbox / input field in the php-site does something...
Can you tell us what it does or can this be backported to 2.0I'm insisting because it's a bit of a show stopper for my implementation....
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Read my last post again, I provided everything you'd need to know to make the change on 2.0.1 by hand.
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Did you edit your previous post?….
AnyhowI applied those 2 patches (I wasn't able to create a patch file from it, but downloaded the 2 raw files with fetch)
I set the timeout to 3600 seconds which should be sufficient.
If this works I will have the best of both worlds (equal spreading of bandwidth and stability)Tomorrow I will know if it does its job better.
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Tomorrow I will know if it does its job better.
So, what's your impression of the new src.track feature (i.e. sticky with a timeout)?
And have you tested how it handles failure of one of the two gateways? (see my question in the previous page)
TIA.
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Because there was still one site that gave problems I didn't dare to post immediately.
But I never had any problems accessing the 2 hosting servers of our own.I think it's working…
I assume it's properly working when your line goes down. The behaviour will depend a lot on what it should do with the current states (flush them or keep them open).I just updated to 2.01, so I needed to patch it again.
I now did it in a way that is easy to share with the community.
It's a bit less work now....I do think it should have been backported to 2.01
Cheers and happy new year
cd /usr/local/www cp -p system_advanced_misc.php system_advanced_misc.php.2.01 patch system_advanced_misc.php <system_advanced_misc.php.patch<br>cd /etc/inc cp -p filter.inc filter.inc.201 patch filter.inc <filter.inc.patch< pre="">/etc/inc/filter.inc.patch281a282,284
if (isset($config['system']['lb_use_sticky']) && is_numeric($config['system']['srctrack']) && ($config['system']['srctrack'] > 0))
$rules .= "set timeout src.track {$config['system']['srctrack']}\n";/usr/local/www/system_advanced_misc.php.patch58a59
$pconfig['srctrack'] = $config['system']['srctrack'];
105c106
< if($_POST['lb_use_sticky'] == "yes")
if($_POST['lb_use_sticky'] == "yes") {
107c108,109
< else
$config['system']['srctrack'] = $_POST['srctrack'];
} else
192a195,200
function sticky_checked(obj) {
if (obj.checked)
jQuery('#srctrack').attr('disabled',false);
else
jQuery('#srctrack').attr('disabled','true');
}
269c277
< />
onClick="sticky_checked(this)" />
278a287,292" class="formfld unknown" >
> "By default this is 0, so source tracking is removed as soon as the state expires. " .
"Setting this timeout higher will cause the source/destination relationship to persist for longer periods of time."); ?>
387c401
< --- -
I upgraded to 2.01 and re-applied the patch….
It's not working :-(I am getting kicked from our hosting server from time to time. 'tcpdump' is running at the same time and as you can see it all of a sudden switches to the other connection.
This is not sticky at all......I did think it was working properly before I upgraded, although I did get some strange behaviour on other servers....
Can I check if srctrack is really set properly?
I have little knowledge of FreeBSD / pfiltertcpdump -i eth0 -n 'port 8443'
14:33:33.041319 IP 89.250.179.117.29754 > 46.243.24.60.pcsync-https: P 1949:2786(837) ack 2746 win 16425 14:33:33.041658 IP 46.243.24.60.pcsync-https > 89.250.179.117.29754: . 2746:4206(1460) ack 2786 win 96 14:33:33.041676 IP 46.243.24.60.pcsync-https > 89.250.179.117.29754: P 4206:4254(48) ack 2786 win 96 14:33:33.092396 IP 89.250.179.117.19784 > 46.243.24.60.pcsync-https: . ack 98209 win 16425 14:33:33.102207 IP 89.250.179.117.19784 > 46.243.24.60.pcsync-https: P 8928:9765(837) ack 98209 win 16425 14:33:33.102225 IP 89.250.180.164.13586 > 46.243.24.60.pcsync-https: S 929859587:929859587(0) win 8192 <mss 1460,nop,wscale="" 2,nop,nop,sackok="">14:33:33.102315 IP 46.243.24.60.pcsync-https > 89.250.180.164.13586: S 1120370230:1120370230(0) ack 929859588 win 5840 <mss 7="" 1460,nop,nop,sackok,nop,wscale="">14:33:33.102667 IP 46.243.24.60.pcsync-https > 89.250.179.117.19784: . 98209:99669(1460) ack 9765 win 228 14:33:33.102681 IP 46.243.24.60.pcsync-https > 89.250.179.117.19784: P 99669:99685(16) ack 9765 win 228 14:33:33.108718 IP 89.250.180.164.38584 > 46.243.24.60.pcsync-https: S 1307358421:1307358421(0) win 8192 <mss 1460,nop,wscale="" 2,nop,nop,sackok="">14:33:33.108751 IP 46.243.24.60.pcsync-https > 89.250.180.164.38584: S 2972341496:2972341496(0) ack 1307358422 win 5840 <mss 7="" 1460,nop,nop,sackok,nop,wscale="">14:33:33.114151 IP 89.250.180.164.16897 > 46.243.24.60.pcsync-https: S 2970339047:2970339047(0) win 8192 <mss 1460,nop,wscale="" 2,nop,nop,sackok="">14:33:33.114183 IP 46.243.24.60.pcsync-https > 89.250.180.164.16897: S 1688705918:1688705918(0) ack 2970339048 win 5840 <mss 7="" 1460,nop,nop,sackok,nop,wscale="">14:33:33.120833 IP 89.250.180.164.48746 > 46.243.24.60.pcsync-https: S 794117234:794117234(0) win 8192 <mss 1460,nop,wscale="" 2,nop,nop,sackok="">14:33:33.120865 IP 46.243.24.60.pcsync-https > 89.250.180.164.48746: S 3021423565:3021423565(0) ack 794117235 win 5840 <mss 7="" 1460,nop,nop,sackok,nop,wscale="">14:33:33.126519 IP 89.250.180.164.52196 > 46.243.24.60.pcsync-https: S 1506349235:1506349235(0) win 8192 <mss 1460,nop,wscale="" 2,nop,nop,sackok="">14:33:33.126550 IP 46.243.24.60.pcsync-https > 89.250.180.164.52196: S 3390423845:3390423845(0) ack 1506349236 win 5840</mss></mss></mss></mss></mss></mss></mss></mss></mss>again…. can't this feature be backported?????
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Can I check if srctrack is really set properly?
You can check if there is a rule. From shell prompt run:
pfctl -sr | fgrep src.track
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Also check:
pfctl -stTo see the current timer values.
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The fun thing about git is each commit is a patch. If you have the commit id, you have the patch. If you do
git show 4573641589d50718b544b778cea864cfd725078aThen you get something usable as a patch file.
commit 4573641589d50718b544b778cea864cfd725078a Author: jim-p <jimp@pfsense.org>Date: Tue Nov 15 16:28:45 2011 -0500 Add a gui field to set the source tracking timeout for sticky connections. diff --git a/etc/inc/filter.inc b/etc/inc/filter.inc index 29864df..fdd43b7 100644 --- a/etc/inc/filter.inc +++ b/etc/inc/filter.inc @@ -280,6 +280,8 @@ function filter_configure_sync($delete_states_if_needed = true) { /* User defined maximum table entries in Advanced menu. */ $rules .= "set limit table-entries {$config['system']['maximumtableentries']}\n"; } + if (isset($config['system']['lb_use_sticky']) && is_numeric($config['system']['srctrack']) && ($config['system']['srctrack'] > 0)) + $rules .= "set timeout src.track {$config['system']['srctrack']}\n"; // Configure flowtable support if enabled. flowtable_configure(); diff --git a/usr/local/www/system_advanced_misc.php b/usr/local/www/system_advanced_misc.php index d25c96d..e1da772 100644 --- a/usr/local/www/system_advanced_misc.php +++ b/usr/local/www/system_advanced_misc.php @@ -56,6 +56,7 @@ $pconfig['proxyuser'] = $config['system']['proxyuser']; $pconfig['proxypass'] = $config['system']['proxypass']; $pconfig['harddiskstandby'] = $config['system']['harddiskstandby']; $pconfig['lb_use_sticky'] = isset($config['system']['lb_use_sticky']); +$pconfig['srctrack'] = $config['system']['srctrack']; $pconfig['gw_switch_default'] = isset($config['system']['gw_switch_default']); $pconfig['preferoldsa_enable'] = isset($config['ipsec']['preferoldsa']); $pconfig['racoondebug_enable'] = isset($config['ipsec']['racoondebug']); @@ -102,9 +103,10 @@ if ($_POST) { else unset($config['system']['proxypass']); - if($_POST['lb_use_sticky'] == "yes") + if($_POST['lb_use_sticky'] == "yes") { $config['system']['lb_use_sticky'] = true; - else + $config['system']['srctrack'] = $_POST['srctrack']; + } else unset($config['system']['lb_use_sticky']); if($_POST['gw_switch_default'] == "yes") @@ -190,6 +192,12 @@ include("head.inc"); print_info_box($savemsg); ?></jimp@pfsense.org> -
Should there really be any output for
pfctl -sr | grep src.track ???
And what would this output be?
I can't find anything wrong with my /etc/inc/filter.inc nor the /usr/local/www/system_advanced_misc.phpReplacing "/usr/local/www/system_advanced_misc.php" with the 2.10 version doesn't make a difference….
Did you apply the patch?
I really thought it was working in my 2.0 setup.
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If pftctl -st shows anything except 0s for src.track, then it's working. 0s (zero seconds) is the default value of src.track.
pfctl -sr wouldn't show it, but it would be in /tmp/rules.debug
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I currently have a situation in which I'm sure that I'm not having a continuing output over the same interface…
This has been proven by doing a tcpdump on the target server...
A new connection to that same server should go over the same interface.....That's the behaviour one needs in a multi-WAN setup (I believe it should be that way always).
If not, you'll get kicked....I don't understand how one can live with a multi-WAN if all of a sudden it suddenly decides to talk using a different interface....
This is asking for trouble and will result in people getting constantly kicked...
I therefore don't understand why this subject is treated with such a low priority....Unless I'm totally wrong, of course...
But no-one has said that thus far either.... -
I don't quite get how sticky works. If I analyzed correctly, with sticky enabled multi-thread http downloading or usenet downloading won't be lOad balanced at all?
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It's because you only look at it from your point of view.
If you want multiple connections to the same server, this isn't for you….I'm using pfsense in multi-LAN, multi-WAN environment....
traffic will then be equally spread over the different intranet/Internet connections, but once a source address is using a certain target, I don't want it to switch suddenly.Many targets don't like this and you will get kicked constantly from websites because you're all of a sudden coming from somewhere else....
