Difference between revisions of "Firewall"
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If you set TCP port in [[aMule]] to XX and UDP port to YY then you have to set your firewall like this: | If you set TCP port in [[aMule]] to XX and UDP port to YY then you have to set your firewall like this: | ||
| − | ''iptables -A INPUT -p tcp --dport XX -j ACCEPT''<br> | + | ''iptables -A INPUT -p tcp --dport '''XX''' -j ACCEPT''<br> |
| − | ''iptables -A INPUT -p udp --dport XX+3 -j ACCEPT''<br> | + | ''iptables -A INPUT -p udp --dport '''XX+3''' -j ACCEPT''<br> |
| − | ''iptables -A INPUT -p udp --dport YY -j ACCEPT''<br> | + | ''iptables -A INPUT -p udp --dport '''YY''' -j ACCEPT''<br> |
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''EXTIF'' is your external interface | ''EXTIF'' is your external interface | ||
| − | ''EMULEPORT= | + | ''EMULEPORT='''4662'''''<br> |
| − | ''EMULEUDP= | + | ''EMULEUDP='''4672'''''<br> |
''EMULEUDP2=`expr $EMULEPORT + 3`''<br> | ''EMULEUDP2=`expr $EMULEPORT + 3`''<br> | ||
| − | ''EMULEHOST=10.0.0.2''<br> | + | ''EMULEHOST='''10.0.0.2'''''<br> |
''iptables -t nat -A PREROUTING -i $EXTIF -p tcp --destination-port $EMULEPORT -j DNAT --to-destination $EMULEHOST:$EMULEPORT''<br> | ''iptables -t nat -A PREROUTING -i $EXTIF -p tcp --destination-port $EMULEPORT -j DNAT --to-destination $EMULEHOST:$EMULEPORT''<br> | ||
''iptables -t nat -A PREROUTING -i $EXTIF -p udp --destination-port $EMULEUDP -j DNAT --to-destination $EMULEHOST:$EMULEUDP''<br> | ''iptables -t nat -A PREROUTING -i $EXTIF -p udp --destination-port $EMULEUDP -j DNAT --to-destination $EMULEHOST:$EMULEUDP''<br> | ||
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| − | You also should make sure that your FORWARD- | + | You also should make sure that your FORWARD-string is set up correctly. Usually, you will have an entry like this: |
''iptables -A FORWARD -i $EXTIF -o $INTIF -d $INTIP -m state --state ESTABLISHED,RELATED -j ACCEPT'' | ''iptables -A FORWARD -i $EXTIF -o $INTIF -d $INTIP -m state --state ESTABLISHED,RELATED -j ACCEPT'' | ||
where ''INTIF'' is your internal interface and ''INTIP'' is your [http://www.ietf.org/rfc/rfc0791.txt IP]. | where ''INTIF'' is your internal interface and ''INTIP'' is your [http://www.ietf.org/rfc/rfc0791.txt IP]. | ||
| − | |||
This will prevent new connections. So, you should allow all forwarding for [[aMule]]-related ports: | This will prevent new connections. So, you should allow all forwarding for [[aMule]]-related ports: | ||
Revision as of 14:10, 25 November 2004
NOTE: If you run SuSE Linux, try this HowTo first.
If you set TCP port in aMule to XX and UDP port to YY then you have to set your firewall like this:
iptables -A INPUT -p tcp --dport XX -j ACCEPT
iptables -A INPUT -p udp --dport XX+3 -j ACCEPT
iptables -A INPUT -p udp --dport YY -j ACCEPT
If you want to setup aMule behind a NAT gateway, you should add these lines to your iptables configuration script, on the gateway :
EXTIF is your external interface
EMULEPORT=4662
EMULEUDP=4672
EMULEUDP2=`expr $EMULEPORT + 3`
EMULEHOST=10.0.0.2
iptables -t nat -A PREROUTING -i $EXTIF -p tcp --destination-port $EMULEPORT -j DNAT --to-destination $EMULEHOST:$EMULEPORT
iptables -t nat -A PREROUTING -i $EXTIF -p udp --destination-port $EMULEUDP -j DNAT --to-destination $EMULEHOST:$EMULEUDP
iptables -t nat -A PREROUTING -i $EXTIF -p udp --destination-port $EMULEUDP2 -j DNAT --to-destination $EMULEHOST:$EMULEUDP2
You also should make sure that your FORWARD-string is set up correctly. Usually, you will have an entry like this:
iptables -A FORWARD -i $EXTIF -o $INTIF -d $INTIP -m state --state ESTABLISHED,RELATED -j ACCEPT
where INTIF is your internal interface and INTIP is your IP.
This will prevent new connections. So, you should allow all forwarding for aMule-related ports:
iptables -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport $EMULEPORT -d $INTIP -j ACCEPT
iptables -A FORWARD -i $EXTIF -o $INTIF -p udp --dport $EMULEUDP -d $INTIP -j ACCEPT
iptables -A FORWARD -i $EXTIF -o $INTIF -p udp --dport $EMULEUDP2 -d $INTIP -j ACCEPT
