Christian Bayer wrote: > Hello, > > following problem: > > I have a network 172.17.180.64/255.255.255.192 (LOC). Default Gateway > 172.17.180.67 > The Shorewall Firewall is Defaultgateway and has IP 172.17.180.67. > > Behind a OTHER CISCO Gateway 172.17.180.68 is a DMZ which uses the > Subnet 10.100.100.0/255.255.255.0 > In this DMZ is a DNS Server with IP 10.100.100.11 > > The Problem: > On all Clients in the 172.17.180.64/255.255.255.192 net the OLD DNS > Server (10.10.10.11 !!!) is written in the Network Settings, > and the CISCO Accepts only Packets to the 10.100.100.x subnet. > > The only thing i want is to FORWARD all UDP/TCP 53 connects to > 10.10.10.11 to the new DNS 10.100.100.11 !!! > > I already used the follwing RULE on 172.17.180.67: > DNAT loc loc:10.100.100.11 udp 53 - > 10.10.10.11 > DNAT loc loc:10.100.100.11 tcp 53 - > 10.10.10.11 > > but this doesnt work. > > Please Help !! >
A configuration such as yours is covered in the Shorewall documentation in the article at http://www.shorewall.net/Multiple_Zones.html (From the documentation index, follow the link labeled "Routing on ONe Interface"). As described there, you need to: set the 'routeback' option on your local interface in /etc/shorewall/interfaces. You *may* also need to add this entry to your /etc/shorewall/masq file. <local_if>:10.100.100.11 172.17.180.0/26 172.17.180.67 but simply adding 'routeback' (along with your DNAT rules) should be enough. -Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ [EMAIL PROTECTED] PGP Public Key \ https://lists.shorewall.net/teastep.pgp.key
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