Internet dies when a torrent is on.
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Sure its not just killing your dns forwarder? I run torrents through my pfsense box all the time, and its sure not any sort of power box. Its an OLD p3 800Mhz, with 256KB of ram on a 6GB HDD – OLD!!!
And I scream with multiple torrents all the time, I see like total 1.8MB down quite often, have my upload in utorrent client limited to 132KB about 1Mbit, since my upload after powerboost ends is only about 2Mbit
I run unbound on my pfsense letting it do all the dns to roots. Im currently running
2.1-DEVELOPMENT (i386)
built on Thu Jul 14 01:23:35 EDT 2011With a gitsync as of this morning.
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The DNS Forwarder is indeed on, almost all computers that are connected use Pfsense's assigned DNS.
Is a DNS required? I landed in this place and the existing pfsense already has a DNS. All the computers are also connected to its DNS.
We are using PFsense for an Internet cafe btw. The timer software that we're using doesn't even require a DNS to connect to the "server".
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Dns kind of required to to use the internet though huh ;)
Heres the thing you forward to where for dns?? p2p can generate a SHIT LOAD of DNS, some little routers dns can not handle it. And there you go no dns = no internet browsering.
Simple test, when you running a torrent from some client, flush its local dns cache
ipconfig /flushdns
now try and ping some stuff, say www.google.com, other websites you like to go to, pfsense.org – do they resolve an IP in quickly? Or does it say unknown host?
example
C:\Windows\System32>ipconfig /flushdnsWindows IP Configuration
Successfully flushed the DNS Resolver Cache.
C:\Windows\System32>ping www.google.com
Pinging www.l.google.com [[b]74.125.157.147] with 32 bytes of data:
Reply from 74.125.157.147: bytes=32 time=34ms TTL=52
Reply from 74.125.157.147: bytes=32 time=34ms TTL=52Ping statistics for 74.125.157.147:
Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 34ms, Maximum = 34ms, Average = 34ms
Control-C
^C
C:\Windows\System32>ping pfsense.orgPinging pfsense.org [[b]69.64.6.21] with 32 bytes of data:
We are not so worried if they respond to the ping or not, but that they actually resolve to an IP (dns)
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So disabling the DNS is a no go. Are there any other solutions for this?
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There's no way you're killing your DNS forwarder, even if someone was intentionally throwing absurd numbers of queries to it on a slow system. The only time I've seen or heard of overloading the DNS forwarder is creating a recursive loop (i.e. set it to query another DNS server, and set that DNS server to query it, so every request loops infinitely) which is impossible to do in the typical setup where you're using an upstream DNS server.
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Who said anything about disabling dns?? You mean its not the problem?
As to no way your killing the forwarder, that depends on what forwarder your using.. I would agree a real no, but for all we know they are pointing to a soho router in front of their pfsense box??
I have seen it be an issue quite often, you normally do not run or even allow p2p in a work setup, so where you normally see this issue is a home setup. Many homes have crappy ass soho routers that have 2MB of ram total and small portion of that is used for their dns forwarder. So yeah you can kill the dns services on a soho router pretty easy when you start doing hundreds if not 1000's of queries for PTRs, etc.
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Ok Im grabbing a big torrent right at the moment, not having any issues what so ever doing anything else on the web, maybe streaming video would be a pain since I pretty much have my download pipe maxed out.
But as you can see from the speed graph on the torrent, its freaking screaming at like 1.8MBps, but not really even touching this OLD P3 800, 256MB ram, etc. Now it puts a bit of a hit on my latency for pinging my gateways, but thats about it.
Now you notice its got a few states going, but its not really over the top.. What are your states when your downloading?
So its not pfsense that has the problem, there is clearly something else as your problem. Now you notice my upload there on the pfsense graph is a hair over 1Mbps – this is about half my upload pipe after speedboost stops, with a speedtest.net I show about 25Mbps down and 4Mbps up - but speedboost from comcast makes that look better than my real pipe is.
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As to no way your killing the forwarder, that depends on what forwarder your using.. I would agree a real no, but for all we know they are pointing to a soho router in front of their pfsense box??
That's very true, I was assuming a direct connection to the Internet with nothing else acting as a DNS forwarder when that's not known to be the case here.
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Now it puts a bit of a hit on my latency for pinging my gateways, but thats about it.
Which is induced by the ISP's limit on your connection, not the firewall, all your traffic will have increased latency when your pipe is full.
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Exactly, I expected that - just showing that its not pfsense not handling a torrent.
