Kernel seems to be blocking messages

Kernel seems to be blocking messages

[Paulo Jorge de Oliveira Cantante de Matos]

Hi all, 
I have a server running 2.6.2-rc1, and I was happily installing
vpopmail and reading the vpopmail gentoo guide (www.gentoo.org). Somehow
(don't ask me
why) every net connections seem to stop and get blocked. Now I cannot
make any socket connection. For example: 

# ping localhost 
PING descartes.geniousdomain (127.0.0.1) 56(84) bytes of data. 
ping: sendmsg: Operation not permitted 
...

Any ideas on how to unblock the situation? 

Cheers,
-- 

Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon
Computer and Software Eng. - A.I.
 - > http://mega.ist.utl.pt/~pocm
---
        -> God had a deadline...
                So, he wrote it all in Lisp!

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Re: Kernel seems to be blocking messages

[asterr]

I have seen this when iptables is running and pings are not permissioned.

On Sat, 21 Feb 2004, Paulo Jorge de Oliveira Cantante de Matos wrote:

> Hi all, 
> I have a server running 2.6.2-rc1, and I was happily installing
> vpopmail and reading the vpopmail gentoo guide (www.gentoo.org). Somehow
> (don't ask me
> why) every net connections seem to stop and get blocked. Now I cannot
> make any socket connection. For example: 
> 
> # ping localhost 
> PING descartes.geniousdomain (127.0.0.1) 56(84) bytes of data. 
> ping: sendmsg: Operation not permitted 
> ...
> 
> Any ideas on how to unblock the situation? 
> 
> Cheers,
> -- 
> 
> Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
> Instituto Superior Tecnico - Lisbon
> Computer and Software Eng. - A.I.
>  - > http://mega.ist.utl.pt/~pocm
> ---
>         -> God had a deadline...
>                 So, he wrote it all in Lisp!
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-admin" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
> 

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Re: Kernel seems to be blocking messages

[Paulo Jorge de Oliveira Cantante de Matos]

Hummm, that's very possible. I'm using iptables and I did tried
somethings with them... I'll see what's happening when I get home from
work.

Thanks a lot... :)
I'll then tell you if you were right.

Cheers,

Paulo Matos

On Sat, 2004-02-21 at 03:22, asterr wrote:
> I have seen this when iptables is running and pings are not permissioned.
> 
> On Sat, 21 Feb 2004, Paulo Jorge de Oliveira Cantante de Matos wrote:
> 
> > Hi all, 
> > I have a server running 2.6.2-rc1, and I was happily installing
> > vpopmail and reading the vpopmail gentoo guide (www.gentoo.org). Somehow
> > (don't ask me
> > why) every net connections seem to stop and get blocked. Now I cannot
> > make any socket connection. For example: 
> > 
> > # ping localhost 
> > PING descartes.geniousdomain (127.0.0.1) 56(84) bytes of data. 
> > ping: sendmsg: Operation not permitted 
> > ...
> > 
> > Any ideas on how to unblock the situation? 
> > 
> > Cheers,
> > -- 
> > 
> > Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
> > Instituto Superior Tecnico - Lisbon
> > Computer and Software Eng. - A.I.
> >  - > http://mega.ist.utl.pt/~pocm
> > ---
> >         -> God had a deadline...
> >                 So, he wrote it all in Lisp!
> > 
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-admin" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> > 
> > 
-- 

Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon
Computer and Software Eng. - A.I.
 - > http://mega.ist.utl.pt/~pocm
---
        -> God had a deadline...
                So, he wrote it all in Lisp!

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
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Re: Kernel seems to be blocking messages

[Paulo Jorge de Oliveira Cantante de Matos]

Hi,

You're right. The problem was the iptables configuration. I've done:
iptables -F
iptables -X

Then to share internet with my clients I've done:
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

however, it seems that it is not working, eth0 is my net connection.
This should work, right? Maybe I'm doing something wrong in my clients
config.

Cheers,

Paulo Matos


On Sat, 2004-02-21 at 03:22, asterr wrote:
> I have seen this when iptables is running and pings are not permissioned.
> 
> On Sat, 21 Feb 2004, Paulo Jorge de Oliveira Cantante de Matos wrote:
> 
> > Hi all, 
> > I have a server running 2.6.2-rc1, and I was happily installing
> > vpopmail and reading the vpopmail gentoo guide (www.gentoo.org). Somehow
> > (don't ask me
> > why) every net connections seem to stop and get blocked. Now I cannot
> > make any socket connection. For example: 
> > 
> > # ping localhost 
> > PING descartes.geniousdomain (127.0.0.1) 56(84) bytes of data. 
> > ping: sendmsg: Operation not permitted 
> > ...
> > 
> > Any ideas on how to unblock the situation? 
> > 
> > Cheers,
> > -- 
> > 
> > Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
> > Instituto Superior Tecnico - Lisbon
> > Computer and Software Eng. - A.I.
> >  - > http://mega.ist.utl.pt/~pocm
> > ---
> >         -> God had a deadline...
> >                 So, he wrote it all in Lisp!
> > 
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-admin" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> > 
> > 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
-- 

Paulo J. Matos : pocm [_at_] mega . ist . utl . pt
Instituto Superior Tecnico - Lisbon
Computer and Software Eng. - A.I.
 - > http://mega.ist.utl.pt/~pocm
---
        -> God had a deadline...
                So, he wrote it all in Lisp!

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
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