i am not an expert - but how can i use iproute2 routing by source ip ? If i understand the whole thing right then the webserver doesn't get the ip of the firewall as source ip - it gets the original ip - so - how can iproute2 then know which packet was comming from the firewall and which packet was comming from the old gateway. But another thing come to mind: Wouldn't it be possible to Mark the packets on the firewall - and then tell iproute2 to route marked packets to the firewall back ? mfG Wolfi Am Mit, 2003-07-23 um 21.58 schrieb George Vieira: > You have to use iproute2 to route by source IP and not destination (default gateway). > > There is an iptables patch in p-o-m which does some funky iproute stuff too but not sure the name.. have a look > > Thanks, > ____________________________________________ > George Vieira > Systems Manager > georgev@xxxxxxxxxxxxxxxxxxxxxx > > Citadel Computer Systems Pty Ltd > http://www.citadelcomputer.com.au > > -----Original Message----- > From: Wolfgang Pichler [mailto:madmin@xxxxxxxxxxxxxxxxx] > Sent: Thursday, July 24, 2003 6:03 AM > To: netfilter@xxxxxxxxxxxxxxxxxxx > Subject: backroute problem > > > hi all, > > we have got new ip addresses - the old one's still exists so that i can > migrate them to the new ones. > > the old ip's are directly assigned to the web/mail server (i know that > this isn't good - but i havn't had a fireall at this time) - now i have > a seperate firewall which has the new ip's assigned to it. > > Now i'd like to change the dns entries so that the traffic goes over the > new ip's (a 4 MBit line ;-) ) - the problem i have is: > > when a packet on the new ip comes then it gets prerouted by the firewall > to the webserver - the webserver gets the packet with the original > source address - now to webserver wants to answer to the packet - but > becuase of the old ip's the webserver have a default route with the old > ip and try's to route the packet over the old gateway - and not back to > the firewall... You know - that can't work. > > I am now searching for a solution for this problem. Can netfilter help > me with this problem - or do i have to use iproute (i havn't ever done > something with iproute) help me ? > > Can i mark the packet's so the the webserver can send them back in the > right direction ? > > mfG > Wolfi > > > > > > > >
