12 votes
Accepted

What fiber optic network interface card do I need for a WAN connection

You don't want to buy a "fiber card". What you want is a card (or preferably a switch) that has either SFP or SFP+ ports. This will allow you to purchase cheap optics depending on what you need, and ...
EEAA's user avatar
  • 110k
7 votes
Accepted

Predictable Network Interface Names

This is described in the man page systemd.net-naming-scheme in later systemd versions. en means ethernet, p means pci, X is the bus number, s means slot, Y is the slot number.
meuh's user avatar
  • 1,583
6 votes

How to check if system supports 64-bit PCIe decoding?

Was it manufactured in the last 10-15 years? If so, it likely supports 64-bit PCI decoding. 64-bit PCI, PCI-X and PCI Express buses all support 64-bit decoding. You can verify 64-bit decoding is in ...
Michael Hampton's user avatar
4 votes

What fiber optic network interface card do I need for a WAN connection

You need to find out what standard your ISP is using before you can start shopping for hardware to connect to it. IF it's a fiber ethernet variant then you can use a network card with a SFP/SFP+ slot ...
Peter Green's user avatar
  • 4,296
3 votes
Accepted

KVM/qemu/libvirt VM PCI Domain/Bus/Slot/Function assignment using virt-install

Yes, you can specify all those on the virt-install command line. Check virt-install --network=? for a complete list of what you can specify. These correspond to the attributes set in XML. For ...
Michael Hampton's user avatar
2 votes
Accepted

lspci "Memory at..." vs /proc/bus/pci/devices BAR address

From what I can determine the format of 0x????0004 communicates some additional information. Bit 2 indicates that the BAR is a 1=64-bit, 0=32-bit address, bit 3 indicates that memory region is 1=...
S. Ramberg's user avatar
2 votes
Accepted

Confirm user_readenv is off in pam_env module

If you were to be using PAM, and submit the following to Trustwave to dispute CVE-2015-8325: sshd -T usepam yes uselogin no Then Trustwave requires proof that PAM is configured to not read ....
Kyle's user avatar
  • 36
2 votes

Linux: Disabling Interrupt Coalescing for NVMe device

Looking at the Linux kernel source there is no mention of that. But you can read and write it with the nvme-cli utility: > nvme get-feature /dev/nvme0n1 -f 8 get-feature:0x8 (Interrupt Coalescing)...
Baruch Even's user avatar
  • 1,091
2 votes
Accepted

SSH Server Public Key Too Small

On Debian jessie (currently oldstable and in LTS; you should have LTS enabled and be upgrading within the next few months) ssh RSA keys are currently generated with 2048 bits. But if the system was ...
Michael Hampton's user avatar
2 votes
Accepted

What do the IDs of PCI devices refer to and which ones are relevent for setting up passthrough?

The "bus" refers to a PCI/PCI-X/PCI express bus from the motherboard's chipset, to which devices are attached. This may or may not be via actual slots on the board; for instance, the onboard Ethernet ...
Michael Hampton's user avatar
2 votes

SSL Security error with SQL Server 2016 sp1

Ran into the same issue with SQL 2016 (though it was on a Server 2016 box). Couldn't find a fix via ODBC drivers but found a Symantec article where a Backup Exec agent was unable to connect to the DB ...
Kelewan's user avatar
  • 21
1 vote

APEI Generic Hardware Error on a linux sever on a PCI OCP

It could be CPU related. The errors happened on vendor_id: 0x8086, device_id: 0x347a, which is a pci:8086-347a | Intel | Core i9/Xeon PCIe Port A Also the port type is the root port. But the ...
accessory's user avatar
  • 141
1 vote

Bind/Unbind PCI device on the Ubuntu host

To do it manually, you can use the same way that you unbound it from the host to make it available to the VM. Something like this should do echo 0000:04:00.0 | sudo tee /sys/bus/pci/devices/0000:04:00....
Azyrod's user avatar
  • 11
1 vote

What is 25gb ethernet good for?

I know these cards are used to quickly transfer data between servers in a server room, but other than that I don't see any real application Since you ask the question on serverfault.com, servers in ...
berndbausch's user avatar
  • 1,033
1 vote

What is 25gb ethernet good for?

These cards would more commonly be used in servers in data centers that have higher bandwidth connections to the internet. They can also be used in corporate data centers where bandwidth is again ...
Tim's user avatar
  • 32.7k
1 vote

What is 25gb ethernet good for?

It's quite useful for: backend of "Internet of the Things" (where all data is received) Distributed Storage system like CEPH/Gluster/Lustre Firewall/Router system (some Linuxes/BSDs are ...
hunter86_bg's user avatar
1 vote

How to check PCI type and version of free PCI slot in Linux shell

You can use dmidecode with slot option something like this: $ sudo dmidecode -t slot |grep -A 4 -B 5 Available Handle 0x0900, DMI type 9, 17 bytes System Slot Information Designation: PCI1 Type: x8 ...
Christian Martínez Barboza's user avatar
1 vote

VMware ESXI - External PCI Ethernet Card

You can search the VMware Compatibility Guide for compatible hardware. Just type the NIC or chip/product ID into the searchbox and get a list of supported releases. You will find a lot of (almost only)...
bjoster's user avatar
  • 4,907
1 vote

What's a simple method for conducting a manual scan for rogue ap detection?

Actually detecting a rogue AP is complex task and it require analyse. First of all, what data can identify AP ? SSID Channel MAC address Location Physical port What data rogue AP can ...
P0pR0cK5's user avatar
  • 350
1 vote

SSL Certificate - Signature Verification Failed Vulnerability

Basically the error response you got from the SSL signature verification is: unable to get local issuer certificate The issuer is the signing authority that received your certificate signing ...
bbaassssiiee's user avatar
1 vote

Cannot remove 'Server' header with request filtering

IIS 10.0 added the removeServerHeader attribute to suppress sending the HTTP server header to remote clients. Previous IIS versions do not support.
ishakkulekci's user avatar
1 vote

PCI Scan Fail on SSLv3 Supported port tcp/38933

Disable SSLv3. It's cryptographically broken. And find out what those services are that are running on those odd, high-numbered ports. And shut them down.
Andrew Schulman's user avatar
1 vote

PCI addresses of 2 network ports differ only in "device function" field => they belong to the same NIC?

82599ES datasheet(p. 64) states: PCIe device numbers identify logical devices within the physical device (the 82599 is a physical device). The 82599 implements a single logical device with two ...
Necto's user avatar
  • 163
1 vote

Confirm user_readenv is off in pam_env module

Running sshd -T (extended test mode) from the terminal should output many of the different configurations that SSH currently has configured - in my case I was able to find "usepam no" and "uselogin no"...
Jon Freynik's user avatar
1 vote

Bios Error on reboot Insuficient PCI Ressources xeon phi , supermicro-server

I'm unsure if you fixed this or not, but I just had the same issue. I was able to resolve it by doing what you said in your comment, I additionally changed: Changed MMIO High Size to 1024 GB ...
copeland3300's user avatar
1 vote

dell poweredge pcie training error, what to do?

dell poweredge servers are configured with only PCIe Gen 3. if your card is Gen2 or Gen1, then you will face training error. check with your PCIe configuration. If it is FPGA Configured PCIe then ...
Rules Ramanujam's user avatar

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