[linux] loopback problem

[Ing. Marian STETINA]

Nazdar ..
Toto samozrejme s routovanim nema nic.

Skusil som si tento tvoj problem nasimulovat:

tcpdump:

17:19:14.179310 IP 127.0.0.1 > 127.0.0.1: ICMP echo request, id 5751, seq 1, length 64
17:19:14.179339 IP 127.0.0.1 > 127.0.0.1: ICMP echo reply, id 5751, seq 1, length 64
17:19:15.179551 IP 127.0.0.1 > 127.0.0.1: ICMP echo request, id 5751, seq 2, length 64
17:19:15.179577 IP 127.0.0.1 > 127.0.0.1: ICMP echo reply, id 5751, seq 2, length 64


Potom som spravil:

iptables -A POSTROUTING -t nat -j SNAT --to 10.30.1.33


.. a opat tcpdump:

17:21:06.169590 IP 10.30.1.33 > 127.0.0.1: ICMP echo request, id 24696, seq 1, length 64
17:21:06.169620 IP 127.0.0.1 > 127.0.0.1: ICMP echo reply, id 24696, seq 1, length 64
17:21:07.171423 IP 10.30.1.33 > 127.0.0.1: ICMP echo request, id 24696, seq 2, length 64
17:21:07.171451 IP 127.0.0.1 > 127.0.0.1: ICMP echo reply, id 24696, seq 2, length 64


Takze skus sa pozret na to, ci mas vhodne napisane pravidla na NAT-ko (napriklad ci mas uvedeny vystupny interfejs).


                                Majo ..



Dňa Ut 3. Apríl 2007 16:52 Marek Slebodnik napísal:
> To som skusal tiez, 
> 
> neviem ci to ma nieco s routovacou tabulkou, kedze ta ip je na
> interface.
> 
> 
> tak posielam aj vypis 
> 
> www ~ # ip ro list table local
> broadcast 127.255.255.255 dev lo  proto kernel  scope link  src
> 127.0.0.1 
> local x.y.144.222 dev eth0  proto kernel  scope host  src
> x.y.144.222 
> broadcast 192.168.10.255 dev eth1  proto kernel  scope link  src
> 192.168.10.1 
> broadcast x.y.128.255 dev eth0  proto kernel  scope link  src
> x.y.144.222 
> local 192.168.10.1 dev eth1  proto kernel  scope host  src 192.168.10.1 
> broadcast x.y.147.255 dev eth0  proto kernel  scope link  src
> x.y.144.222 
> broadcast x.y.144.0 dev eth0  proto kernel  scope link  src
> x.y.144.222 
> broadcast 192.168.10.0 dev eth1  proto kernel  scope link  src
> 192.168.10.1 
> broadcast 127.0.0.0 dev lo  proto kernel  scope link  src 127.0.0.1 
> local 127.0.0.1 dev lo  proto kernel  scope host  src 127.0.0.1 
> local 127.0.0.0/8 dev lo  proto kernel  scope host  src 127.0.0.1 
> 
> 
> A ani tunevidim nic podivneho
> 
> On (03/04/07 14:21), Mike wrote:
> > Zdar,
> > 
> > Co to spravi, ked tu cestu na 127/8 vymazes uplne ?
> > Pozeram co mam kde na serveroch a vacsina nema explicitne nastavenu
> > cestu na 127/8 v routovacej tabulke.
> > 
> > Mike
> > 
> > Marek Slebodnik wrote:
> > >  ========================================================================
> > >  
> > >  pricom routy su taketo 
> > >  
> > >  =========================================================================
> > >  www conf.d # ip ro
> > >  192.168.10.0/24 dev eth1  proto kernel  scope link  src 192.168.10.1
> > >  x.y.144.0/22 dev eth0  scope link
> > >  127.0.0.0/8 dev lo  scope link
> > >  default via x.y.144.1 dev eth0
> > >  =========================================================================
> > >  
> > 
> 
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