TheGrebs.com:IRC Logs:#uml:2005:03:07

---	Log	opened Mon Mar 07 12:33:30 2005
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12:33	-!-	Irssi: #uml: Total of 67 nicks 0 ops, 0 halfops, 0 voices, 67 normal
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12:33	Mephisto	should be clear: 192.168.9/24 is the LAN network, .1 is the gateway to the outside world
12:34	Newsome	looks okay
12:34	mikegrb	hey Newsome
12:34	mikegrb	hey Mephisto
12:34	Newsome	hi, mikegrb
12:34	Mephisto	hi
12:34	Newsome	or, should we say caker2 :)
12:34	mikegrb	heh
12:34	Mephisto	lol
12:36	Mephisto	I did something like "ifconfig eth0 hw ether fe:fe:fe:fd:fd:fd; ifconfig eth0 192.168.9.9 up" to setup the interface
12:36	Mephisto	followed by adding the default gateway
12:37	Mephisto	detailed setup info: http://www.q-vadis.net/index.php?mID=stories&lng=de&art=14
12:37	Mephisto	if you check it out, ignore anything but the gray boxes
12:38	Mephisto	(the IP addresses are different since I wouldn't invite people to try spoofing attacks to visit me at home ... ;)
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12:38	Mephisto	anyhow, it's really weird: a second UML system running on the same host can also connect without problems
12:39	Newsome	Mein Deutsch saugt
12:39	Mephisto	you dont need to read the german texts :)
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12:40	Mephisto	I posted the URL just for the gray boxes if someone want to checkout the bridge setup, e.g.
12:40	Mephisto	I wrote the whole stuff to provide a (first?) german "Howto setup an UML system" guide
12:42	Newsome	oh, by the way, I found that if you accidentally get the resize_inode flag set, you can turn it off using "tune2fs -O ^resize_inode root_fs"
12:42	Mephisto	ah
12:42	Mephisto	I remember ;)
12:44	Newsome	are the broadcast and mask addresses looking right if you do an "ifconfig eth0" inside the uml?
12:45	Newsome	and do you have the loopback configured?
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12:47	Mephisto	broadcast and netmask is fine, yep
12:47	Mephisto	loopback ... arghl!
12:48	Mephisto	is it just: "ifconfig lo 127.0.0.1 up" ?
12:48	Mephisto	should be, I guess
12:48	Newsome	I think that should do it
12:49	Mephisto	Newsome for president!
12:49	Mephisto	I runs
12:49	Newsome	hehe
12:50	Mephisto	time to update the article on my website ...
12:50	Mephisto	;-)
12:50	Newsome	yeah :)
12:55	Mephisto	arghl... such a stupid error - I wonder why I didn't see that the lo interface was neither up nor configured...
13:07		* jdike patchbombs Linus
13:08	Mephisto	lol
13:09		* mikegrb bombs Mephisto
13:09		* Mephisto bombs back
13:09	jdike	16/84 on their way
13:10	Newsome	wow, 84?
13:10	Newsome	just sending 16 for now?
13:10	jdike	Newsome: yeah, 84
13:10	jdike	Newsome: I got depressed having to pipe 'quilt series
13:10	jdike	' through more
13:11	Newsome	heh
13:11	jdike	Newsome: these are mostly the easy ones
13:11	Mephisto	one of it is probably to display a message "setup that fucking loopback interface before complaining about network problems in #uml" :-P
13:11	jdike	Mephisto: why didn't your distro do that?
13:12	Mephisto	ah, not really needed anymore ;-)
13:12	Mephisto	ah, sry - misunderstanding
13:12	Mephisto	don't know
13:13	Mephisto	I installed the root fs from scratch
13:13	Mephisto	using debianbootstrap for minimum Debian Woody installation, than upgraded to Adamantix
13:13	Mephisto	came up without fstab, networking script, and so on - did all by hand
13:18	Newsome	back in a few
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13:19	Mephisto	grmpfl ... FC3 update service overloaded again :(
13:20	Mephisto	question: can I use iptables on the host system to monitor/block traffic from and to the UML running on the same host?
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14:35	timster	mephisto, yes on the iptables
14:36	timster	if you are using bridging
14:44	Mephisto	yes, I do
14:44	Mephisto	thx
14:45	timster	if the bridge controls whats forwarded
14:46	timster	you can use iptables to block/account/allow
14:46	timster	whats forwarded
14:46	monthos	im using tuntap, and private addresses, and setting up NAT on the host machine to forward, it works when i ping hosts from the uml, but anything that utilizes the network more than a few packets freezes the connection. any ideas?
14:46	timster	freezes it?
14:46	monthos	the network connection dies
14:46	timster	its not like your allowing imcp thru
14:46	timster	but nothing else?
14:46	monthos	anything works, although just for half a second
14:47	timster	weird
14:47	timster	whats your host kernel
14:47	monthos	2.6.7
14:47	Newsome	and BlaisorBlade goes berserk and answers everyone's questions on the mailing lists...
14:47	jdike	hehe
14:47	timster	:}
14:48	jdike	He operates in batch mode
14:48	timster	there was a bug in the earlier bridging code .
14:48	timster	in 2.6.7 that I know of
14:48	timster	when a tuntap gets deleted from the bridge
14:48	timster	networking locks up
14:48	Newsome	jdike: that makes sense
14:48	timster	I saw it when guests would reboot
14:49	timster	any my scripts did tunctl and brctl
14:49	timster	anything that used the network would lockup though
14:49	timster	even sendmail
14:49	timster	and the processes would go into a D state
14:49	monthos	hrm
14:49	timster	thats not it though, monthos?
14:50	timster	sounds like a different issue?
14:50	monthos	slightly different
14:50	timster	yeah, it seems limited to the one tuntap.
14:50	monthos	ill try a newer kernel for the hell of it though, got nothing else better to do
14:50	timster	:}
14:51	monthos	:P
14:51	timster	try 2.6.11 with the skas3-v8 and skas3-v8patch
14:51	timster	seems to work pretty well.
14:51	timster	also, the cfq-ts patch
14:51	timster	:}
14:51	timster	(thanks caker)
14:52	timster	sorry, skas3-v8fix patch
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15:02	Guy-	monthos: also try decreasing the MTU on the interface
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---	Log	closed Tue Mar 08 00:00:09 2005