2008/9/15 Robert <kerplop at sbcglobal.net>: > > > Robert Nichols wrote: >> >> Dmitry Cherkasov wrote: >>> >>> Hello everybody! >>> >>> Could anybody advice on the following problem. >>> I need to assign several ip-addresses to 'lo' interface (beside >>> 127.0.0.1). It is convenient to me to implement NAT with such >>> addresses. >> >> The "lo" interface already accepts packets with any 127.x.y.z >> address. Do you really need more addresses than the 127.0.0.0/8 >> block? >> >> $ ping -c1 127.111.222.123 >> PING 127.111.222.123 (127.111.222.123) 56(84) bytes of data. >> 64 bytes from 127.111.222.123: icmp_seq=1 ttl=64 time=0.104 ms >> >> I did absolutely nothing special to set that up. I also routinely >> have an stunnel process listening on 127.0.0.25:465, and again, I >> did nothing special with the interface configuration or routing >> tables to allow that to work. > > Any doubter can demonstrate that easily: > ----------- > > #!/bin/bash > # > z=1;y=0;x=0 > while [ $x -le 255 ] ; do > y=0 > while [ $y -le 255 ] ; do > z=1 > while [ $z -le 255 ] ; do > ping -c1 127.$x.$y.$z > (( z +=1 )) > done > (( y +=1 )) > done > (( x +=1 )) > done Theoretically 'fping -g 127.0.0.0/8' does the same yet it consumes too much memory. My box with 512MB of RAM didn't manage to execute this ;-) > --------------------- > <snip> > PING 127.5.139.115 (127.5.139.115) 56(84) bytes of data. > 64 bytes from 127.5.139.115: icmp_seq=1 ttl=64 time=0.051 ms > > --- 127.5.139.115 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.051/0.051/0.051/0.000 ms > PING 127.5.139.116 (127.5.139.116) 56(84) bytes of data. > 64 bytes from 127.5.139.116: icmp_seq=1 ttl=64 time=0.052 ms > > --- 127.5.139.116 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.052/0.052/0.052/0.000 ms > PING 127.5.139.117 (127.5.139.117) 56(84) bytes of data. > 64 bytes from 127.5.139.117: icmp_seq=1 ttl=64 time=0.051 ms > > --- 127.5.139.117 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.051/0.051/0.051/0.000 ms > PING 127.5.139.118 (127.5.139.118) 56(84) bytes of data. > 64 bytes from 127.5.139.118: icmp_seq=1 ttl=64 time=0.051 ms > > --- 127.5.139.118 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.051/0.051/0.051/0.000 ms > > > ...etc. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Dmitry Cherkasov