we had similar problem
we solved changing the following configuration:
/etc/sysctl.d/10-network-security.conf
# Turn on Source Address Verification in all interfaces to
# prevent some spoofing attacks.
net.ipv4.conf.default.rp_filter=1
net.ipv4.conf.all.rp_filter=1
# Turn on SYN-flood protections. Starting with 2.6.26, there is no loss
# of TCP functionality/features under normal conditions. When flood
# protections kick in under high unanswered-SYN load, the system
# should remain more stable, with a trade off of some loss of TCP
# functionality/features (e.g. TCP Window scaling).
net.ipv4.tcp_syncookies=1
change
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.all.rp_filter=0
Omar
Omar Pighi
Sr. Engineer, VisLab
Email opi...@ambarella.com<mailto:opi...@ambarella.com> - Phone: +39
0521 90 6181 (GMT+1)
VisLab, an Ambarella company - Parco Area delle Scienze,
Tecnopolo, Pad. 33, Univ di Parma, 43124 PARMA, Italy
Administration: off...@vislab.it<mailto:off...@vislab.it> phone: +39 0521
905725
Il 18/12/2017 16:13, Joey DiGiorgio ha scritto:
Sorry for the long wait but I didn't get a chance to try your suggestion until
this morning.
I disabled my firewall on both machines. The results are shown below.
sudo iptables -L -n
Chain INPUT (policy ACCEPT)
Chain FORWARD (policy ACCEPT)
Chain OUTPUT (policy ACCEPT)
The UDP messages still show up via tcpdump but the slave ptp4l instance is not
picking up offsets.
- Joey D.
On Dec 15, 2017 12:49 PM, "Richard Cochran"
<richardcoch...@gmail.com<mailto:richardcoch...@gmail.com>> wrote:
On Fri, Dec 15, 2017 at 12:09:02PM -0500, Joey DiGiorgio wrote:
Any ideas on what might be going wrong here?
Try turning off the firewall.
HTH,
Richard
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