Comment 0 for bug 1899690

**What happened**:

My Kubernetes 1.17 cluster (and Kubernetes 1.16 cluster) have 40-50 of firewall rules that say `[unsupported revision]`. I am concerned this will cause problems with

```
# iptables-save
...
-A KUBE-SEP-AAAREDACTED1 -s 10.99.99.27/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED1 -p tcp -m tcp -j DNAT [unsupported revision]
-A KUBE-SEP-AAAREDACTED2 -s 10.99.99.40/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED2 -p tcp -m tcp -j DNAT [unsupported revision]
-A KUBE-SEP-AAAREDACTED3 -s 10.99.99.27/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED3 -p tcp -m tcp -j DNAT [unsupported revision]
```

**What you expected to happen**:

I expect these firewall rules to be valid, like so:

```
# iptables-save
...
-A KUBE-SEP-AAAREDACTED1 -s 10.99.99.27/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED1 -p tcp -m tcp -j DNAT --to-destination 10.99.99.27:9153
-A KUBE-SEP-AAAREDACTED2 -s 10.99.99.40/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED2 -p tcp -m tcp -j DNAT --to-destination 10.99.99.40:3306
-A KUBE-SEP-AAAREDACTED3 -s 10.99.99.27/32 -j KUBE-MARK-MASQ
-A KUBE-SEP-AAAREDACTED3 -p tcp -m tcp -j DNAT --to-destination 10.99.99.27:53
```

**How to reproduce it (as minimally and precisely as possible)**:

1. Allocate a worker node
1. Install Ubuntu 18.04.5
2. Install Kubernetes with Canal
  * I'm using Rancher & RKE, and I assume this happens with vanilla versions of Kubernetes as well.
3. Install the Ubuntu LTS Hardware Enablement (HWE) kernel via https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Server
4. Reboot
5. When the system comes back online & Docker is running, look for invalid iptables rules as shown above.

** Environment **

- 18.04.5 LTS (Bionic Beaver)
- Kernel - Linux cntest13 5.4.0-48-generic #52~18.04.1-Ubuntu SMP Thu Sep 10 12:50:22 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux\
- Kubernetes 1.17.11 - Installed via RKE
- Canal version: rancher/calico-node:v3.13.4 (Not sure how to tell the other version numbers)
- Docker version: 18.9.9

Happens with both Bare Metal and VM systems:
- Bare metal nodes - AMD EPYC 7452 32-Core Processor, large memory, multiple NICs to different networks
- VMs on VMware vSphere

Default iptables version:

```
# iptables --version
iptables v1.6.1
# ls -ld `which iptables`
lrwxrwxrwx 1 root root 13 Nov 12 2017 /sbin/iptables -> xtables-multi
#
```

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-generic-hwe-18.04 5.4.0.48.52~18.04.42
ProcVersionSignature: Ubuntu 5.4.0-48.52~18.04.1-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.18
Architecture: amd64
Date: Tue Oct 13 19:19:20 2020
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US
 SHELL=/bin/bash
SourcePackage: linux-meta-hwe-5.4
UpgradeStatus: No upgrade log present (probably fresh install)