IP Problems (was: Re: Linux User Mag)

["Alex Hudson" <nospam [at] york.ac.uk>]

Hi Russ...

>   Does any one else have this prob ,basicaly i'm wanting to compile
> kernel SuSE 6.3 to support ip forwarding, router with multi network
> card's,

SuSE 6.3 comes with this precompiled in, AFAIK...

> As i can telnet all machines but not ping them ????

You have ICMP (?spell?) messages either being blocked, or rejected. Not to
worry (completely!), if you can telnet, your network works.

> tried various route path's but to no avail.

If you tell me what you did, I can show you what you did wrong ;) Most of
the time, if you're just configuring a basic router (are you sure that's
what you want??), it should work no problems, although if you have ICMP
blocking enabled, you have something odd, if not wrong. Possibly an IPCHAINS
problem, or something similar. Alternatively, it could be the security
setting (often, ping is DENYed because it closes off another method of
information / attack, etc.).

> Any when it come to compile time
> there in no config file to make in /usr/src/linux so cant do this so
> where is it ???

You have to make it - 'make menuconfig' is the usual way to do it. If 'make
menuconfig' reports either 'no targets', or 'can't find target menuconfig'
or something similar, you only have kernel headers installed - you need the
full sources. Headers just allow other programs to link into the kernel, or
communicate with the kernel. You need the full source to compile the kernel.

Cheers,

Alex.


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