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This means that several valid IPv4 multicast addresses map to the same Ethernet addresses. The final bytes are taken directly from the lowest 23 bits (aka 3 bytes minus highest 1 bit) of the IPv4 multicast address. This ought to be an actual IEEE OUI - 01-00-5e-xx-xx-xx = IPv4 multicast First byte is x0, x4, x8, xc = you can look it up! Subtracting 2 from the first byte MAY get you the vendor, depending on what practice the local admins follow. These are not registered with IEEE - you are supposed to assign them “locally”, with varying interpretations of “local”. First byte not divisible by 4 = locally-configured Rounding down to a multiple of 4 ( = subtracting 1 or 3 ) from the first byte MAY get you the vendor, depending on application. These are typically never used as source address, only destination address. The first 3 bytes are often referred to as the “MAC Vendor field” or “IEEE OUI”, though note that OUI:s are also used for non-Ethernet things. Lets Encrypt - error 9814 - chain had an expired certsĦ bytes, formatted in lots of ways.

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Install OneConnect without Microsoft store.

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How to - Configure your On-Prem firewall to work with the Passwordless VPN SASE service.Configure Clavister OneConnect using deep links.Configure Clavister OneConnect for macOS, iOS and iPadOS towards NetWall.

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Configure Clavister OneConnect for Windows towards Clavister NetWall.

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Configure Clavister OneConnect for Android and ChromeOS towards NetWall.

Clavister (Classic) SSL VPN vs OneConnect (OpenConnect based) SSL VPN.

Why does WireShark say that SNMPv3 traps sent from cOS Core are 'snmpV2-trap'?.

Using Clavister OneConnect Classic SSL VPN client towards the OneConnect server.

Using /31 network masks in cOS Core (RFC-3021).

Using 'all-nets' as source/destination network in IPsec tunnels.

The meaning of the 'Default_Access_Rule' log entry.

Swapping NetWall Ethernet interfaces using 'Set interface Ethernet'.

Solving HA nodes both going active/inactive at the same time.

Server cluster generates UnsolicitedARPReplies in log (Gratuitous/GARP).

Running cOS Core 14.00 on M1 based Apple Devices with QEMU.

Protecting against the Apache Log4j exploit.

Placing HA cluster nodes in different physical locations.

Packet drops due to TCP Sequence numbers ('tcp_seqno_too_high' or 'tcp_seqno_too_low').

NetWall virtual firewall creation under KVM on ARM.

Managing NetWall HA clusters over the Internet using one public IP.

LogOpenFails and no_new_conn_for_this_packet log events.

Is it possible to change the Ethernet Ringsize buffers on Hyper-V?.

Is Statless (FwdFast) faster than a normal IP policy?.

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Installing a SECaaS License on Virtual NetWall Firewalls.

IP blocked by IP reputation & IP reputation mechanics.

How to setup a simple cloud-init environment for testing.

How to disable the read-only flag for InControl inherited objects.

How to configure a Captive Portal in cOS Core.

How to approach FTPS (without opening too many ports).

How to adjust RX and TX ring sizes (queue lengths) of Ethernet interfaces.

How do i set up a OneConnect VPN tunnel in cOS core.

HA: disallowed_on_sync_iface log events with rule=HA_RestrictSyncIf for Reverse ARP, RARP, and IGMP.

Gratuitous ARP and the CLI command 'ifstat -restart '.

Forward traffic to a second ISP using Virtual Routing or Policy Based Routing.

Example setup script for x86 cOS Core under KVM.

Does IPsecBeforeRules trigger before Access rules?.

Device initiated InControl management of NetWall HA clusters with a single public IP.

Configuring public certificates in NetWall firewalls.

Configuring multiple networks behind the same interface.

Configuring SSL-VPN / OneConnect server on secondary Firewall IP address.

Configure the OpenConnect-GUI client towards Clavister NetWall.

Configure the Android OpenConnect client towards Clavister NetWall.

Configure Linux OpenConnect towards Clavister NetWall.

Clavister SFP/SFP+ module compatibility.

Certificate problem using SSL VPN together with MacOS version 11.1 and up.

Can blacklist timeouts (TTL,lifetime) for 'Scanner Protection' or 'Botnet Blocking' be changed or increased?.

Assigning additional IPs to cOS Core Ethernet interfaces.

Allowing Traceroute to and through cOS Core.

Allowing Path MTU discovery in cOS Core.

Adjusting advanced cluster settings on larger installations.

A trusted webpage blocked by IP reputation.

'Disabling IPsec tunnel.' warning when deploying a configuration change.