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RE: [SCTP-Discussion] Can not receive SCTP/IPv6 packets. It seems dropping incomming SCTP/IPv6 packets.


Chronological Thread 
  • From: "Hashimoto, Yukio (NSN - JP/Tokyo)" <yukio.hashimoto AT nsn.com>
  • To: ext Michael Tüxen <Michael.Tuexen AT micmac.franken.de>
  • Cc: sctp-discussion AT sctp.de, "Hanamura, Koichi \(NSN - JP/Tokyo\)" <koichi.hanamura AT nsn.com>
  • Subject: RE: [SCTP-Discussion] Can not receive SCTP/IPv6 packets. It seems dropping incomming SCTP/IPv6 packets.
  • Date: Fri, 4 Nov 2011 09:44:55 +0800
  • List-archive: <http://lists.franken.de/pipermail/sctp-discussion>
  • List-id: SCTP Discussions <sctp-discussion.sctp.de>
Hi. Michael,

> > SCTP/IPv6 packets from peer, even on local loopback.
> BTW: Does it work when only using IPv4?
Yes, it works with no problem.

> Do you have any other kind of firewall running?
I believe the following two commands stop firewall.
Please let me know other things need to think about the fire-wall since I am
not good at Linux?

- "service ip6tables stop"
- "service iptables stop"

> Since the source code seems also to use the sctp socket api library.
> you might be able to switch to the kernel SCTP implementation.
Yes, I did turn off sctp comes with linux kernel by modifying blacklist.conf
as:

/etc/modprobe.d/blacklist.conf:
blacklist sctp

Otherwise the it complains about kernel sctp is installed when calling
sctplib.


Regards,
Yukio Hashimoto


> -----Original Message-----
> From: ext Michael Tüxen
> [mailto:Michael.Tuexen AT micmac.franken.de]
> Sent: Wednesday, November 02, 2011 9:29 PM
> To: Hashimoto, Yukio (NSN - JP/Tokyo)
> Cc:
> sctp-discussion AT sctp.de;
> Hanamura, Koichi (NSN - JP/Tokyo)
> Subject: Re: [SCTP-Discussion] Can not receive SCTP/IPv6 packets. It
> seems dropping incomming SCTP/IPv6 packets.
>
> On Nov 2, 2011, at 12:16 AM, Hashimoto, Yukio (NSN - JP/Tokyo) wrote:
>
> > Hi. SCTPLIB support,
> >
> > We are using a tool, called "seagull", which is using sctplib on
> > RHEL5.7.
> > We have a serious problem of SCTP/IPV6 on RHEL5.7.
> >
> > Shown in packet captures files attached, it seems to drop all
> incoming
> > SCTP/IPv6 packets from peer, even on local loopback.
> >
> > I tried a command "service ip6tables stop" and "service iptables
> stop",
> > but they did not help solving this.
> Do you have any other kind of firewall running? I think to remember
> some sort of Linux specific security feature which might need to be
> disabled. However, I'm not a Linux expert.
>
> Since the source code seems also to use the sctp socket api library.
> you might be able to switch to the kernel SCTP implementation.
>
> Best regards
> Michael
> >
> > I have no idea what is going on and what configuration should be to
> > receive SCTP/IPv6 packets using sctplib.
> >
> > Could you teach me how to fix this problem?
> >
> >
> >
> > Regards,
> > Yukio Hashimoto
> >
> >
> >
> > --
> > Yukio HASHIMOTO
> > Solution Architect, CSI
> > Nokia Siemens Networks
> > e-mail:
> > yukio.hashimoto AT nsn.com
> > Mobile: +81-80-4110-3852
> > Phone: +81-3-5474-6400 Fax: +81-3-5775-2736
> >
> >
> >
> <IPv6_pkt_capture.pcap><pktcapture2.pkt>_______________________________
> ________________
> > sctp-discussion mailing list
> > sctp-discussion AT sctp.de
> > http://www.sctp.de/mailman/listinfo/sctp-discussion



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