> ipset create TOR_NODES hash:ip -exist
> ( ipset flush TOR_NODES;
> curl -s https://check.torproject.org/cgi-bin/TorBulkExitList.py?ip=$(dig +short
> myip.opendns.com @resolver1.opendns.com) | grep -v '^#' | xargs -L1 ipset -A
> TOR_NODES )&
> iptables -F NOTOR
> iptables -A NOTOR -m set --match-set TOR_NODES src -j REJECT
> iptables -A NOTOR -m set --match-set TOR_NODES dst -j REJECT
> iptables -A NOTOR -j RETURN

--- a   2013-12-22 23:52:08.763948000 +0400
+++ b   2013-12-22 23:52:27.286948000 +0400
@@ -3,6 +3,7 @@
 ( ipset flush TOR_NODES;
 curl -s https://check.torproject.org/cgi-bin/TorBulkExitList.py?ip=$(dig +short myip.opendns.com @resolver1.opendns.com) | grep -v '^#' | xargs -L1 ipset -A TOR_NODES )&
 
+iptables -N NOTOR
 iptables -F NOTOR
 iptables -A NOTOR -m set --match-set TOR_NODES src -j REJECT
 iptables -A NOTOR -m set --match-set TOR_NODES dst -j REJECT

ADDR=$(dig +short myip.opendns.com @resolver1.opendns.com)

Без sort -u
# time (curl -s https://check.torproject.org/cgi-bin/TorBulkExitList.py?ip=$ADDR | grep -v '^#' | xargs -L1 ipset -A TOR_NODES)

real    0m7.241s
user    0m1.941s
sys     0m3.056s

---
# time (curl -s https://check.torproject.org/cgi-bin/TorBulkExitList.py?ip=$ADDR | grep -v '^#' | sort -u | xargs -L1 ipset -A TOR_NODES)

real    0m6.596s  C утилью uniq на 0.1 сек. дольше.  
user    0m1.645s
sys     0m2.695s

Пол секунды профита :)

# ipset -L | wc -l
2779