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Re: [Alug] MTU & TCP/IP
by Ricardo Campos 05 Apr '02

05 Apr '02

> > Is there any way to change the default MTU in Linux -SNIP- In response to my own question (for the archives, you see), I edited the /etc/ppp/options file, adding the lines mtu 576 #this is for outgoing connections mru 576 #this is for incoming connections (actually, I didn't add the comments). I used ping to work out the appropriate numbers. Ricardo -- Get your free email from www.linuxmail.org Powered by Outblaze

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Re: [Alug] Would the next iptables expert step forward please.
by Ricardo Campos 05 Apr '02

05 Apr '02

> I am trying to use Endoshield in the same way but have recompiled my > kernel with the relevant bits included I get the following when depmod > is run: > > depmod: *** Unresolved symbols in > /lib/modules/2.4.18/kernel/net/ipv4/netfilter/ip_conntrack.o If they are included, then you shouldn't need to load modules? The script is likely calling for modules, if iptables was compiled in, these modules won't exist. (i.e. may have to modify the script) Ricardo -- Get your free email from www.linuxmail.org Powered by Outblaze

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Would the next iptables expert step forward please.
by bsamuels＠beenthere-donethat.org.uk 05 Apr '02

05 Apr '02

Having upgraded my Debian system to 'Testing' I am trying to move to kernel 2.4.18 but before I do that I need to get an iptables firewall set up. With my original 2.2.20 kernel I had used PMFirewall to set up my firewall. Answer a few simple questions and Bingo - one firewall and a perfectly servicable one too. I am trying to use Endoshield in the same way but have recompiled my kernel with the relevant bits included I get the following when depmod is run: depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/ip_conntrack.o depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/ip_tables.o depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/ipt_REJECT.o depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/iptable_filter.o depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/iptable_mangle.o depmod: *** Unresolved symbols in /lib/modules/2.4.18/kernel/net/ipv4/netfilter/iptable_nat.o What have I forgotten? Barry Samuels P.S. If any of you are thinking of entering the 'Firewall Duffer of the year' competition then forget it. I shall win hands down.

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Re: Meetings, was Re: [Alug] (no subject)
by Ricardo Campos 04 Apr '02

04 Apr '02

>I think two sites on one day is too much. Why not take advantage of the >May/June split and have ALUG do both dates, one in each venue? I think so too. We *REALLY* need to advertise- but where? In computer shops maybe? Get some posters designed? >April - try to get a King's Lynn venue, probably tomorrow. Fine by me, depending on the date. >May 19th - Syleham (BJ, did you book it already?) Linux Install Day I might be able to make it, although I have exams the week after (and will have been on hols the week before) >June 9th - UEA Norwich (need someone to book this) Linux Install Day I will certainly turn up! >July } { One of these a BBQ, maybe at Syleham? Yay! BBQ! >Aug. } { One of these a normal meeting, maybe at Elmswell? Yay! ANOTHER BBQ!!! >Start screaming now, AAAAAAAAAAARRRRRRGGGGGGGGGGGGGGHHHHHHHHHH!!!!!!!!!!! :) (someone had to do it) Ricardo _______________________________________________ "There are several codes, and I know several of them." -Mr. Precise. http://www.rscampos.net -- Get your free email from www.linuxmail.org Powered by Outblaze

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Re: [Alug] MTU & TCP/IP
by Ricardo Campos 04 Apr '02

04 Apr '02

> I've not seen it implemented as a daemon, generally it's implemented > in the kernel as Path MTU discovery. I suspected it would be in the kernel- the discovery method working on ever dial-up connection made would get a little irritating, since it would slow things down initially (as it tested the network path) What is advmss? > But there are unfortunately many networks that don't play nice > with this. Interesting. An example, and why? Sorry, I'm in ultra-inquisitive mode. Ricardo PS. Anyone fancy GIVING me £3000 so I can go back to university? Anyone? Anyone? oh. Oh well! -- Get your free email from www.linuxmail.org Powered by Outblaze

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New Member Info
by Darren Casey 04 Apr '02

04 Apr '02

Hi Been lurking for a while now on an old e-mail address but figured it was time to actually come forward and say hello. My names Darren, I live in Essex, 27. I own a medium sized web hosting company, with servers in the US all running Slackware 8, usual stuff PHP/MySQL/Perl/Apache/Sendmail or Qmail PGSQL etc.. We also have servers running Redhat on another network, these are Leased. The other ones are our own equipment, i.e. we are not a reseller as so many "hosting companies are" Just ordered a Rack in Redbus Docklands which should be live by the end of the month. The version of Slackware we use is highly customised, I have found this distro to be great as a server rather then a desktop OS. Everything about the way it boots to the way we run MySQL is "different" which is nice but can also be a nightmare sometime :) I just order SuSE to give that a go as a office desktop OS, tried Deb but didn't really get on with it. I love Linux, not even close to understanding everything about it but I can handle everytning I ever need to do with it. I have a guy that writes PureFTPD working for me on a part time basis and he knows more then I could ever hope to know. His also a hardcore programmer, his working with the PHP Dev team atm for upgrades to the new version etc.. Nice guy to have on board. Here to mix with a few like minded people and learn a thing or two. Regards Darren

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(no subject)
by Linux Newbie 04 Apr '02

04 Apr '02

Hi Does any one know the date for the next meeting at the Uea,>? are the meetings free or not ? and how long do they last for, 1 hour 2 hours etc linuxnewbie14(a)hotmail.com _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.

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fridge
by David Freeman 04 Apr '02

04 Apr '02

Well finally after over 7 months of waiting, I finally managed to persuade a parental unit to drive me to the wonderful village of Burwell to Collect my Vaxen from Jenny. After an hours playing with her windows box to get it to log on (failed) I finally departed with two Vaxen and 5 wine bottle thingys. And in Traditional style: two Vaxes : 15 ukp ea. petrol to collect them: 10 ukp Look on my dads face when he saw the size of it: Priceless Thank you Jenny. D

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MTU & TCP/IP
by Ricardo Campos 04 Apr '02

04 Apr '02

Is there any way to change the default MTU in Linux dynamically? (OK, I know that there *is*, I just can't work out how). Specifically, is the change system wide, or could I change it on a per interface basis? I guess I could use ifconfig for eth0, but I am unsure as to where it is set for ppp0. e.g. ppp0 (MTU=<1000) and eth0 (MTU=1000) Is there any kind of mtu learning daemon for interfaces? (i.e. MTU actually being worked out by testing fragmentation of packets on the network) Ricardo, being inquisitive ;) _______________________________________________ "There are several codes, and I know several of them." -Mr. Precise. http://www.rscampos.net Check my online diary out: http://www.rscampos.net/blog.html -- Get your free email from www.linuxmail.org Powered by Outblaze

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Re: [Alug] MTU & TCP/IP
by Ricardo Campos 04 Apr '02

04 Apr '02

In reply to asking about changing MTU's, adam wrote:- > Oh stupid me forgot to mention that you can also set it as an option in > pppd the same way as you would using ifconfig. Yes, looks like the suitable option. I just noticed that an an MTU of about 500 produces a significant change in 'speed' over a dial-up (POTS). I didn't think it would make a great difference, but it does, esp. for loading graphics on a webpage. Utterly useless for ADSL, leased/ISDN or cable modems, but then I don't have them. thanks, off to fiddle with my ppp settings! Ricardo _______________________________________________ "There are several codes, and I know several of them." -Mr. Precise. http://www.rscampos.net -- Get your free email from www.linuxmail.org Powered by Outblaze

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