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Old 02-19-2009, 11:58 AM   #1
LOH Mephisto
LQ Newbie
 
Registered: Feb 2009
Distribution: Fedora, ubuntu, centeos
Posts: 4

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setting up linux servers


I'm thinking of setting up some servers, but I don't have a lot of experience with linux server. I'm thinking of using Slackware.

the servers I'm setting up are:
- DHCP/Gateway server
- Mail/Print server

The clients:
- 2 Win Xp pro pc (Wired)
- 1 Win mobile Pda (Wireless)
- 1 Win Wp pro Notebook (Wireless)

The mail are fetched from isp via pop3 and sent to isp via smtp
the mails from and to clients via imap

Can any one give me some guide lines how to set these servers up

Thanks LOH
 
Old 02-19-2009, 01:10 PM   #2
armandrix
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Registered: Nov 2005
Location: Brazil
Distribution: slackware64 -current
Posts: 46

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Hi

I suggest you to think in one thing at a time.

Gateway server you'll find thru iptables, where you can write a file script and set it all up, i.e:
Quote:
# cleanning up
iptables -F
iptables -t nat -F

# "Ping of Death"
iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT

# "Syn-flood, DoS, etc"
iptables -A FORWARD -p tcp -m limit --limit 1/s -j ACCEPT

# (NAT,DNAT,SNAT)
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT

# Performance
iptables -t mangle -A OUTPUT -o $ENT -p tcp --dport 53 -j TOS --set-tos Minimize-Delay
iptables -t mangle -A OUTPUT -o $ENT -p tcp --dport 80 -j TOS --set-tos Minimize-Delay

#internals - check it with dhcp server
iptables -A INPUT -p tcp --syn -s 192.168.0.10 -j ACCEPT
iptables -A OUTPUT -p tcp --syn -s 192.168.0.10 -j ACCEPT
iptables -A FORWARD -p tcp --syn -s 192.168.0.10 -j ACCEPT

# share internet
iptables -t nat -A POSTROUTING -s *$REDEINT -o *ppp0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward

... and so on...
There are several dhcp server you can install easily.
Print server you'll have to use samba due windows machines.
You can choose from many mail server like sendmail or postfix.

Hope it helps,

regards
 
  


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