On Tue, 2003-02-04 at 21:49, Blackard, Robert wrote: > I had similar problems when I set up my firewall - first I had one with two > nic's, now one with three. I had the iptables definitions set up just fine, > but the routing was acting up. > > It turns out that the default ifup and ifup-aliases scripts make some > assumptions about how you want the routing done. I had to comment out some > of the default routing in these and add an etc0.route file with default > (static) route definitions in /etc/sysconfig/networking/devices when I set > up using RedHat 8.0. With RedHat 7.2, I commented the ifup and ifup-aliases > file and put the static route into staticroutes file (?) under > /etc/sysconfig/network-scripts directory. > The routing is fine. I can get in and out of the server using either interface. It's just pinging one interface from the other fails, but only if I use the interface name.
I setup the routing specifically to overwrite what the system boots up with by using iproute2 to specify that all traffic arriving on an interface must keep that interface IP address as its source address. All the traffic routes correctly. John. > -----Original Message----- > From: John Horne [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, February 04, 2003 3:31 PM > To: [EMAIL PROTECTED] > Subject: Pinging local multihomed server interfaces > > Hello, > > I have setup two local multihomed servers with redhat 8.0. Each has 2 > NIC's in them ,and each nic has its own IP address. The addresses are > 'real' - i.e. they are not non-routing private addresses. The servers > are also configured, using iproute2, to load balance the traffic out of > each interface. The simple round-robin of the DNS will provide the > inbound traffic being (sort of) shared out to each nic :-) > > No problems generally with this. But if I try and ping from the server > one of its nics, specifying to use the same interface (NIC) then the > ping works. If I tell it to ping the other nic then it fails - generally > it just times out. If I use the IP addresses then it all works. So, for > one server we have: > > eth0=141.163.163.248 eth2=141.163.163.249 > > So 'ping -I eth0 141.163.163.248' and > 'ping -I eth2 141.163.163.249' works. > But > 'ping -I eth0 141.163.163.249' and > 'ping -I eth2 141.163.163.248' fails. > > Doing the same, but using the IP addresses > 'ping -I 141.163.163.248 141.163.163.249' and > 'ping -I 141.163.163.249 141.163.163.248' works. > > Anyone know why if I use the interface name it fails, but if I use the > IP addresses it works? Ifconfig of the interfaces shows the correct IP > addresses. > > > Thanks, > > John. > > -- > ------------------------------------------------------------------------ > John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914 > E-mail: [EMAIL PROTECTED] > PGP key available from public key servers > > > > -- > redhat-list mailing list > unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe > https://listman.redhat.com/mailman/listinfo/redhat-list > > > > -- > redhat-list mailing list > unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe > https://listman.redhat.com/mailman/listinfo/redhat-list -- ------------------------------------------------------------------------ John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914 E-mail: [EMAIL PROTECTED] PGP key available from public key servers -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
