Bug 1988427

Summary:	[4.6] drop-icmp pod blocks direct SSH access to cluster nodes
Product:	OpenShift Container Platform	Reporter:	mcambria <mcambria>
Component:	Networking	Assignee:	mcambria <mcambria>
Networking sub component:	openshift-sdn	QA Contact:	zhaozhanqi <zzhao>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	urgent
Priority:	urgent	CC:	aconstan, dahernan, gpei, jialiu, ljakubow, mcambria, mifiedle, pescorza, pmagotra, rsandu, sreber, tsze
Version:	4.6.z
Target Milestone:	---
Target Release:	4.6.z
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1984449	Environment:
Last Closed:	2021-12-15 20:01:34 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1988426
Bug Blocks:

Comment 4 Chen 2021-10-22 10:13:14 UTC

Hi team,

One of my customers is also hitting this bug but they could update their cluster in a short time frame. Do we have any workaround for this issue ? Thanks a lot!

Best Regards,
Chen

Comment 6 mcambria@redhat.com 2021-11-15 15:51:15 UTC

*** Bug 2022703 has been marked as a duplicate of this bug. ***

Comment 13 zhaozhanqi 2021-12-02 03:26:51 UTC

Verified this bug on 4.6.0-0.nightly-2021-12-01-180138

Comment 14 zhaozhanqi 2021-12-02 03:27:14 UTC

sh-4.4# iptables-save | grep -i ICMP
:AZURE_CHECK_ICMP_SOURCE - [0:0]
:AZURE_ICMP_ACTION - [0:0]
-A INPUT -p icmp -m icmp --icmp-type 3/4 -j AZURE_CHECK_ICMP_SOURCE
-A OPENSHIFT-BLOCK-OUTPUT -p tcp -m tcp --dport 22623 --tcp-flags FIN,SYN,RST,ACK SYN -j REJECT --reject-with icmp-port-unreachable
-A OPENSHIFT-BLOCK-OUTPUT -p tcp -m tcp --dport 22624 --tcp-flags FIN,SYN,RST,ACK SYN -j REJECT --reject-with icmp-port-unreachable
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.0.8/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.0.6/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.32.6/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.0.5/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.32.4/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_CHECK_ICMP_SOURCE -s 10.0.32.5/32 -p icmp -j AZURE_ICMP_ACTION
-A AZURE_ICMP_ACTION -j LOG
-A AZURE_ICMP_ACTION -j DROP

Comment 17 errata-xmlrpc 2021-12-15 20:01:34 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.6.52 bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:5010