Download Linux Network Security Course by Michel Bisson PDF
By Michel Bisson
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2007 Michel Bisson # run the mailqueue /usr/sbin/sendmail -q Also make a cronjob that runs every now and then to flush the queue: ----------------------# run queue every 5 minutes */5 * * * * root test -x /usr/sbin/sendmail # && \ nice -n10 /usr/sbin/sendmail -q ----------------------That's it. Mail should now be queued until it can be delivered via your own mail server. ----------------------------------------------------------------For security, though, you don't want to let people log in to your OpenSSH server as you without a passphrase.
To achieve this, the deny rule must be declared first. delay_access 1 deny special_hosts delay_access 1 allow intranets This above examples are some of the most useful configurations I've found so far. x explains in more details the different possibilities. conf # DELAY POOL PARAMETERS (all require DELAY_POOLS compilation option) #--------------------------------------------------------------------# TAG: delay_pools # This represents the number of delay pools to be used. For example, # if you have one class 2 delay pool and one class 3 delays pool, you # have a total of 2 delay pools.
IPTABLES} t mangle A PREROUTING p tcp dport 23 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp sport 23 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 22 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp sport 22 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 20 j TOS settos \ MaximizeThroughput ${IPTABLES} t mangle A PREROUTING p tcp sport 20 j TOS settos \ MaximizeThroughput ${IPTABLES} t mangle A PREROUTING p tcp dport 21 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p udp dport 53 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 53 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 25 j TOS settos MinimizeCost ${IPTABLES} t mangle A PREROUTING p tcp dport 110 j TOS settos NormalService ${IPTABLES} t mangle A PREROUTING p icmp j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 5190 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 4000 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p udp dport 4000 j TOS settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 6666:6667 j TOS \ settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp dport 1214 j TOS settos MinimizeCost ${IPTABLES} t mangle A PREROUTING p tcp dport 6699 j TOS settos MinimizeCost ${IPTABLES} t mangle A PREROUTING p tcp dport 6700 j TOS settos MinimizeCost ${IPTABLES} t mangle A PREROUTING p tcp dport 1412 j TOS \ settos MaximizeThroughput ${IPTABLES} t mangle A PREROUTING p tcp sport 1412 j TOS \ settos MaximizeThroughput ${IPTABLES} t mangle A PREROUTING p udp dport 4000:7000 j TOS \ settos MinimizeDelay ${IPTABLES} t mangle A PREROUTING p tcp sport 80 j TOS settos MinimizeCost I have also put together a simple but quite effective QOS script which you may want to put into your /etc/ppp/ip-up script This script was put together from a number of other scripts I found on the internet.