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| gubluntu | how do i get tcpdump to produce less output | 04:55 |
|---|---|---|
| gubluntu | like hiding duplicates | 04:55 |
| gubluntu | or rather... whats the best way to watch incoming and outgoing connections | 04:55 |
| [miles] | gubluntu, thats not really a ubuntu-server specific question is it? | 04:57 |
| [miles] | and I recommend you man tcpdump | 04:57 |
| gubluntu | i have | 04:58 |
| gubluntu | figured i might ask someones opinion for what they use | 04:59 |
| gubluntu | is that not an appropriate question? | 04:59 |
| gubluntu | i.e. iptraf, snort etc.. | 05:00 |
| [miles] | ok well if you've hit the manual.. | 05:00 |
| [miles] | when you say less output | 05:00 |
| [miles] | what exactly do you want to filter out? | 05:00 |
| [miles] | also, have you created a specific filter etc yet... look also at WireShark if you have'nt yet | 05:01 |
| gubluntu | does wireshark have console only? | 05:08 |
| gubluntu | ive seen it for windows with a gui... | 05:08 |
| === gubluntu grimaces | ||
| gubluntu | ooh! manpages | 05:08 |
| gubluntu | tcpdump 'tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net localnet' | 05:08 |
| gubluntu | sry.. | 05:08 |
| [miles] | lol | 05:08 |
| [miles] | you can load your tcpdump file into WireShark | 05:09 |
| [miles] | the GUI (And it's not just windows either) | 05:09 |
| gubluntu | nonono gui! | 05:09 |
| gubluntu | :-P | 05:09 |
| gubluntu | brb | 05:09 |
| [miles] | it was previously known as Ethereal | 05:09 |
| [miles] | and it's a shit hot product | 05:09 |
| mralphabet | shit hot? . . . is that good or bad | 05:18 |
| [miles] | thats good | 05:24 |
| [miles] | like, doggies bollocks | 05:24 |
| mralphabet | are you british? | 05:25 |
| mralphabet | scottish? | 05:25 |
| [miles] | no, soy espaol | 05:26 |
| === mralphabet thinks of others that use the word bollocks | ||
| [miles] | nah, I'm British, but lived in spain for years | 05:26 |
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| gubluntu | merda claiente? | 05:39 |
| gubluntu | caliente (sp?) | 05:39 |
| [miles] | mierda | 05:39 |
| [miles] | not merda | 05:39 |
| gubluntu | ah. | 05:40 |
| [miles] | gubluntu, which country are you from? | 05:40 |
| gubluntu | us | 05:41 |
| gubluntu | in nyc | 05:41 |
| [miles] | ah ok | 05:41 |
| [miles] | a doddle dandy eh | 05:41 |
| [miles] | ;) | 05:41 |
| gubluntu | lol | 05:41 |
| [miles] | joder | 05:41 |
| [miles] | it's a complete shite writing LDAP schema's | 05:41 |
| === gubluntu is a noob | ||
| [miles] | I'll be glad when I eventually get it finished :-| | 05:42 |
| gubluntu | what do i use for localnet? | 05:42 |
| gubluntu | in tcpdump 'tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net localnet' | 05:42 |
| [miles] | having to order a OID from IANA | 05:42 |
| [miles] | localnet? | 05:42 |
| [miles] | you mean localhost? | 05:42 |
| gubluntu | man pages say: tcpdump 'tcp[tcpflags] & (tcp-syn|tcp-fin) != 0 and not src and dst net _localnet_' | 05:43 |
| mralphabet | local net as in local subnet | 05:43 |
| mralphabet | perhaps | 05:43 |
| gubluntu | how do i calc local subnet? | 05:43 |
| [miles] | ah ok | 05:43 |
| [miles] | from your IP and mask | 05:43 |
| coNP | I guess Ubuntu default install creates an entry in /etc/networks | 05:43 |
| coNP | as localnet | 05:43 |
| [miles] | whats your IP and network mask | 05:43 |
| [miles] | ifconfig | 05:43 |
| [miles] | then you can work out the CID | 05:43 |
| [miles] | like 192.168.1.0/24 | 05:44 |
| gubluntu | http://www.subnetonline.com/subcalc/subnet1.html | 05:45 |
| gubluntu | destination address? | 05:45 |
| [miles] | sorry? | 05:46 |
| gubluntu | im trying to use the subnet calculator | 05:46 |
| gubluntu | but its asking for destination address | 05:46 |
| [miles] | bah | 05:46 |
| [miles] | why? | 05:46 |
| [miles] | just work it out | 05:46 |
| [miles] | you know binary? | 05:46 |
| gubluntu | goodpoint | 05:46 |
| [miles] | like the /24 means 255.255.255.0 | 05:47 |
| [miles] | aka | 05:47 |
| gubluntu | mask here is 255.255.255.224 | 05:47 |
| [miles] | 11111111 11111111 11111111 00000000 | 05:47 |
| [miles] | 24 bits set | 05:47 |
| [miles] | from left to right | 05:48 |
| [miles] | it's easy peasy | 05:48 |
| [miles] | lemon squeezy | 05:48 |
| gubluntu | so if my ip was 1.2.3.4 with a mask of 255.255.255.224 | 05:49 |
| gubluntu | my subnet is 1.2.3.0/24? | 05:49 |
| [miles] | no | 05:51 |
| [miles] | I just explained it to you | 05:51 |
| === gubluntu frowns | ||
| [miles] | look: | 05:51 |
| [miles] | like the /24 means 255.255.255.0 | 05:51 |
| [miles] | so | 05:51 |
| [miles] | 192.168.1.0/24 has a netmask of 255.255.255.0 | 05:52 |
| [miles] | thats CIDR format | 05:52 |
| [miles] | 192.168.1.0/25 = 255.255.255.128 | 05:52 |
| [miles] | netmask | 05:52 |
| [miles] | 11111111 11111111 11111111 00000000 = 255.255.255.0 | 05:53 |
| [miles] | 11111111 11111111 11111111 10000000 = 255.255.255.128 | 05:53 |
| gubluntu | ah | 05:53 |
| gubluntu | 255.255.255.224 = 27 11111111.11111111.11111111.111 00000 | 05:53 |
| [miles] | 11111111 11111111 11111111 11000000 = 255.255.255.192 | 05:53 |
| [miles] | the /nn = number of bits set to 1 from left to right | 05:54 |
| [miles] | so /32 = 11111111 11111111 11111111 11111111 | 05:54 |
| [miles] | aka, every bit | 05:54 |
| [miles] | and /1 = 10000000 00000000 00000000 00000000 | 05:55 |
| [miles] | now you understand? | 05:55 |
| gubluntu | yup | 05:55 |
| gubluntu | thank you | 05:55 |
| gubluntu | 192.168.1.0/27 did it right | 05:55 |
| [miles] | you tell me :P | 05:56 |
| [miles] | right, I'm bored of binary now | 05:56 |
| [miles] | time to fuck off home | 05:56 |
| [miles] | ciao tio | 05:56 |
| [miles] | good luck! | 05:56 |
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| gubluntu | anyone have an idea for the hardware specs for a ubuntu mail server running Postfix/Courier/MySQL/Amavisd-new/SpamAssassin/ClamAV/SASL/TLS/Horde for about 25-30 users | 06:50 |
| gubluntu | like min proc speed ram etc... | 06:50 |
| coNP | gubluntu: what availabiltiy is needed? | 06:52 |
| coNP | :) | 06:52 |
| gubluntu | how so? | 06:52 |
| coNP | I think 25-30 users are not very much, so you can use an "ordinary desktop machine" to provide these services. | 06:53 |
| gubluntu | yea? | 06:53 |
| gubluntu | like a 2.8 dual core pent D with 2gb ram and crap load of space? | 06:53 |
| coNP | how many emails / user (a day, or an hour)? | 06:53 |
| gubluntu | hrmmm | 06:54 |
| gubluntu | 100 emails an hour? | 06:54 |
| gubluntu | including a lot of spam which i hope to reduce drastically being that i have NO spam protection right now on ym netbsd sun board running eixm | 06:55 |
| mralphabet | uhhh . . . a 486 would work | 06:55 |
| coNP | okay, I guess spam filtering is the most processor intensitve | 06:55 |
| coNP | I guess a PII-PIII is okay | 06:55 |
| coNP | but sure, a 486 should also do it | 06:55 |
| mralphabet | anything built in the last 5 years would be fabulous | 06:55 |
| coNP | sure | 06:55 |
| gubluntu | is it safe to put webamil (horde) on the same server? | 06:56 |
| coNP | I think yes | 06:57 |
| gubluntu | what do you guys use for mailservers? | 06:59 |
| gubluntu | ubuntu? | 06:59 |
| mralphabet | gmail | 07:00 |
| mralphabet | ;) | 07:00 |
| gubluntu | lol | 07:00 |
| mralphabet | gmail for domains! | 07:00 |
| coNP | ubuntu | 07:00 |
| coNP | exim4 | 07:00 |
| coNP | dovecot | 07:00 |
| coNP | there are some answers :) | 07:00 |
| coNP | these are my choices by now | 07:01 |
| gubluntu | exim is where it at isnt it | 07:01 |
| gubluntu | very configurable | 07:01 |
| coNP | sorry, gubluntu ? | 07:01 |
| gubluntu | but too much for me to learn right now i think | 07:01 |
| gubluntu | what server dist should i use? | 07:04 |
| gubluntu | version rather? | 07:04 |
| coNP | gubluntu: depends on... :) | 07:05 |
| gubluntu | ... | 07:05 |
| gubluntu | out of all the ppl around me.. im gonna go ahead with the opinion of the person sitting in the ubuntu-server channel | 07:06 |
| gubluntu | what r my choices? | 07:06 |
| coNP | dapper | 07:06 |
| coNP | edgy | 07:06 |
| gubluntu | dapper or edgy | 07:07 |
| coNP | I guess, if Ubuntu | 07:07 |
| coNP | I would say Dapper for now | 07:07 |
| gubluntu | so dapper has longer support? | 07:07 |
| gubluntu | is that the deal? | 07:07 |
| coNP | that is | 07:07 |
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| gubluntu | exit | 07:30 |
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