TOPIC:

[default]
signing_required=no
protocol_vers_map=6
port445=netbios_only

port445 - How to use SMB TCP/UDP ports

"How to use SMB TCP/UDP ports" can be one of:

both - Attempt to connect via port 445. If that is unsuccessful, try to connect via NetBIOS.

netbios_only - Do not attempt to connect via port 445.

no_netbios - Attempt to connect via port 445. If that is unsuccessful, do not try to connect via NetBIOS.

"Bitmap of SMB Versions that are enabled" can be one of:

7 == 0111 - SMB 1/2/3 should be enabled
6 == 0110 -SMB 2/3 should be enabled
4 == 0100 - SMB 3 should be enabled

"Bitmap of SMB Versions that have signing required" can be one of:
7  Signing required for SMB 1/2/3.
6  Signing required for SMB 2/3.
4  Signing required for SMB 3.

# nfs.conf: The NFS Configuration File
# LumaForge Optimized
nfs.client.access_cache_timeout=30
nfs.client.nfsiod_thread_max=15
nfs.client.access_for_getattr=1
nfs.client.allow_async=1
nfs.client.mount.options=retrycnt=10,rwsize=65536,dsize=16384,readahead=128,rw,async
nfs.client.nextdowndelay=15
nfs.client.statfs_rate_limit=5
# End LumaForge Optimized

net.myri10ge.en*.lro_cnt=8
net.myri10ge.en*.intr_coal_delay=5

sudo sysctl -w net.inet.tcp.autorcvbufmax=2097152

net.inet.tcp.autorcvbufmax=2097152
net.inet.tcp.autosndbufmax=2097152
net.inet.tcp.delayed_ack=0
net.inet.tcp.lro=1
net.inet.tcp.tso=1
net.inet.tcp.win_scale_factor=8
net.link.generic.system.hwcksum_rx=1
net.link.generic.system.hwcksum_tx=1

net.inet.tcp.autorcvbufmax=1048576
net.inet.tcp.autosndbufmax=1048576
net.inet.tcp.delayed_ack=0
net.inet.tcp.lro=0
net.inet.tcp.tso=4
net.inet.tcp.win_scale_factor=8
net.link.generic.system.hwcksum_rx=1
net.link.generic.system.hwcksum_tx=1

sudo sysctl -w net.smb.fs.loglevel=99

log stream --level debug --predicate 'senderImagePath contains "smb"'

log show --debug --predicate 'senderImagePath contains "smb"' --last 1h

sudo sysctl -w net.smb.fs.loglevel=0

2019-03-06 14:41:34.564 Df kernel[0:398cd] (smbfs) nbssn_recv: Breaking connection, sock_receivembuf blocked for 20
2019-03-06 14:41:34.564 Df kernel[0:398cd] (smbfs) smb_iod_reconnect: Starting reconnect with server
2019-03-06 14:41:34.564 Df kernel[0:3992d] (smbfs) smb2_smb_parse_change_notify: smb_rq_reply failed 60
2019-03-06 14:41:34.564 Df kernel[0:398cd] (smbfs) tcp_connect: nbp_rcvbuf = 7405568 nbp_sndbuf = 7405568
2019-03-06 14:41:40.566 Df kernel[0:398cd] (smbfs) smbfs_down: Share not responding...

#
# /etc/nsmb.conf - Global Config
# ~/Library/Preferences/nsmb.conf - User Config, Overrides Global Config
# No reboot required, just unmount and remount
# man nsmb.conf - to view localized options
#
#
# Aug 28, 2018
# For macOS X 10.13 High Sierra
# Tested on macOS X 10.13.6 High Sierra
#
[default]
# Avoids any Kerberos or NTLM questions from the mac and assumes non-certed creds (standard in most cases)
# but if you have Kerb or NTLS you may want to set this to that - Speeds up mounting.
minauth=none
 
# NetBOIS on isilon is no good, this forces the mac to net even attempt NB and stricktly use DNS
port445=no_netbios
 
# Allows the mac to have synchronous R or W access to the same file within different SMB calls.
# Faster performance in some cases.
streams=yes
 
# Soft mounts, same concept as NFS soft mounts,
# offloads application hangs to the OS and decreases
# the chance of an application hang or crash because
# of some but below layer 4, i.e. lacp break, alt route, IO stall or busy, etc. - application stability
soft
 
# Change notifications are off. This is a lengthy one to explain but i'll try to summarize,
# macOS is not good with open file handles over SMB.
# This means when a user has been doing a bunch of work that day on the storage
# a bunch of lingering file handles will somewhat stay open,
# change notify is a part of the SMB stack which is a background communication
# between the mac and storage which will be chattier and chattier as the day goes on.
# This doesnt stop open file handles but it does stop the chattiness on the line
notify_off=yes
 
# This is the bit mode that forces SMB3 only connections and SIGNIFICANTLY decreases mount time from seconds to almost zero.
# If you have other non-SMB3 storage your users need to use another bit mode. you can find that in the man.
protocol_vers_map=4
 
# Already default now in 10.13 but i like it there in case Apple changes something again, which they do.
signing_required=no
 
# Checks that the negotition is infact the SMB level that is being requested
# by sending some test data that only the protocol can support.
# Slows things down, trust us, its SMB3.
validate_neg_off=yes
 
# Makes protocol stalls more apparent therefor making identifiable problems more apparent.
max_resp_timeout=1s
 
# How many simul requests can macOS make to ask find what is in an open finder window.
dir_cache_async_cnt=1000
 
# 0 means no max
dir_cache_max=0s
 
# 0 means no min
dir_cache_min=0s
 
# This is the ability to keep the cache and refer back to it.
# Having that enabled does not show any updates to the finder (finder refresh related).
# If the dir_cache is turned off then you make the request to fill the
# "temp" cache every time you jump into a folder instead of referring to a premade dir-cache.
dir_cache_off=yes
 
# Unknown, but helps some applications save/overwrite files ?
file_ids_off=yes