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cavher
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Problems with printer on lan

Thu May 04, 2023 6:28 pm

Hello everyone! First, sorry for my English, I'm from Argentina and English is not my specialty.

I want you to give me a hand to see if I can get this thing out that is killing me and I am not being able to solve it

Image

Currently my DHCP range for the LAN
It is a 192.168.0/22
Where my gateway is 192.168.0.222

I have devices that have a static IP on the network cards (ip range: 192.168.0.1 – 192.168.0.255)

and Wifi DHCP (IP Range: 192.168.3.1 – 3.255)

I have a printer with fixed IP 192.168.0.116 Subnet mask 255.255.252.0 and the gateway: 192.168.0.222.

And I have the notebooks that are Wifi that are within the mentioned DHCP range (192.168.3.xxx), now well. From the computers, I PING the printer's ip and it answers OK. But I can't "share" the printer and print, if I want to see the web access of the printer it doesn't work either.

Now, if one of these notebooks is changed to a Static IP within the 192.168.0.xxx range, everything works fine.

Now, everything is a single NETWORK from the mikrotik everything is managed and it has created a /22 in the addresses and the DHCP is created as /22 although in the pool it only leaves the /24 of the 3.x enabled

Config Mikrotik
# may/04/2023 12:50:38 by RouterOS 6.49
# software id = U9Z6-AYZG
#
# model = 2011UiAS-2HnD

/interface bridge
add arp=proxy-arp comment="DHCP LAN Eth 2 al Eth 10" name=bridge1
/interface ethernet
set [ find default-name=ether1 ] comment="UPLINK CLARO" speed=100Mbps
set [ find default-name=ether2 ] comment=\
    "UPLINK TELECENTRO - FAILOVER SECUNDARIO" speed=100Mbps
set [ find default-name=ether3 ] comment="UPLINK SWITCH OF 801" speed=100Mbps
set [ find default-name=ether4 ] comment=LIBRE speed=100Mbps
set [ find default-name=ether5 ] comment="UPLINK SWITCH OF 803" speed=100Mbps
set [ find default-name=ether6 ] advertise=\
    10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full comment=\
    "NVR 1"
set [ find default-name=ether7 ] advertise=\
    10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full comment=LIBRE
set [ find default-name=ether8 ] advertise=\
    10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full comment=LIBRE
set [ find default-name=ether9 ] advertise=\
    10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full comment=LIBRE
set [ find default-name=ether10 ] advertise=\
    10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full comment=LIBRE
set [ find default-name=sfp1 ] disabled=yes
/interface ethernet switch port
set 6 vlan-mode=fallback
set 7 vlan-mode=fallback
set 8 vlan-mode=fallback
set 9 vlan-mode=fallback
set 10 vlan-mode=fallback
set 12 vlan-mode=fallback
/ip pool
add name=pool-VPN ranges=172.10.1.2-172.10.1.100
add name="DHCP NUEVO" ranges=192.168.3.1-192.168.3.254
/ip dhcp-server
add address-pool="DHCP NUEVO" disabled=no interface=bridge1 lease-time=12h \
    name="DHCP - GENERAL"
/lora servers
add address=eu.mikrotik.thethings.industries down-port=1700 name=TTN-EU \
    up-port=1700
add address=us.mikrotik.thethings.industries down-port=1700 name=TTN-US \
    up-port=1700
add address=eu1.cloud.thethings.industries down-port=1700 name=\
    "TTS Cloud (eu1)" up-port=1700
add address=nam1.cloud.thethings.industries down-port=1700 name=\
    "TTS Cloud (nam1)" up-port=1700
add address=au1.cloud.thethings.industries down-port=1700 name=\
    "TTS Cloud (au1)" up-port=1700
add address=eu1.cloud.thethings.network down-port=1700 name="TTN V3 (eu1)" \
    up-port=1700
add address=nam1.cloud.thethings.network down-port=1700 name="TTN V3 (nam1)" \
    up-port=1700
add address=au1.cloud.thethings.network down-port=1700 name="TTN V3 (au1)" \
    up-port=1700
/ppp profile
add change-tcp-mss=yes dns-server=8.8.8.8,8.8.4.4 local-address=192.168.0.222 \
    name=VPN-L2TP-MAC remote-address=pool-VPN use-compression=yes \
    use-encryption=yes
add change-tcp-mss=yes dns-server=8.8.8.8,8.8.4.4 local-address=192.168.0.222 \
    name="VPN EXTERNOS" only-one=yes remote-address=pool-VPN use-compression=\
    no use-encryption=yes
/queue simple
add disabled=yes max-limit=10M/20M name=queue3 target=192.168.0.113/32
add disabled=yes max-limit=10M/10M name=queue2 target=192.168.0.104/32
add disabled=yes max-limit=10M/22M name=queue1 target=192.168.0.115/32
add disabled=yes max-limit=10M/22M name=queue4 target=192.168.0.82/32
/queue type
set 5 pcq-classifier=dst-address
/queue interface
set wlan1 queue=only-hardware-queue
/snmp community
set [ find default=yes ] addresses=186.22.24.145/32 write-access=yes
/tool user-manager customer
set admin access=\
    own-routers,own-users,own-profiles,own-limits,config-payment-gw
/user group
set full policy="local,telnet,ssh,ftp,reboot,read,write,policy,test,winbox,pas\
    sword,web,sniff,sensitive,api,romon,dude,tikapp"
/interface bridge port
add bridge=bridge1 hw=no interface=ether5
add bridge=bridge1 hw=no interface=ether4
add bridge=bridge1 hw=no interface=ether6
add bridge=bridge1 hw=no interface=ether7
add bridge=bridge1 hw=no interface=ether8
add bridge=bridge1 hw=no interface=ether3
add bridge=bridge1 hw=no interface=ether9
add bridge=bridge1 hw=no interface=ether10
/interface pptp-server server
set authentication=pap default-profile="VPN EXTERNOS" enabled=yes
/ip address
add address=192.168.0.222/22 interface=bridge1 network=192.168.0.0
/ip dhcp-client
add comment="DHCP para Telecentro - Distance 2 - Enlace de Backup" \
    default-route-distance=2 disabled=no interface=ether2 use-peer-dns=no
/ip dhcp-server network
add address=172.10.1.0/24 gateway=172.10.1.1
add address=192.168.0.0/22 dns-server=8.8.8.8,8.8.4.4 gateway=192.168.0.222
/ip dns
set servers=8.8.8.8,8.8.4.4
/ip firewall filter
add action=accept chain=forward dst-address=192.168.0.116 in-interface=\
    bridge1 src-address=192.168.0.0/22
add action=accept chain=forward dst-address=192.168.0.0/22 in-interface=\
    bridge1 src-address=192.168.0.116
add action=accept chain=input comment="L2TP - VPN" dst-port=4500 protocol=udp
add action=accept chain=input comment="L2TP - VPN" dst-port=500 protocol=udp
add action=accept chain=input comment="L2TP - VPN" dst-port=1701 protocol=udp
add action=accept chain=input comment=PPTP dst-port=1723 in-interface=ether1 \
    protocol=tcp
add action=accept chain=input comment=PPTP dst-port=1723 in-interface=ether2 \
    protocol=tcp
add action=accept chain=input comment=PPTP protocol=gre
add action=accept chain=input protocol=ipsec-esp
add action=accept chain=input protocol=ipsec-ah
add action=drop chain=input comment="Bloquear Ataques FTP" dst-port=21 \
    protocol=tcp src-address-list=ftp_blacklist
add action=accept chain=output content="530 Login incorrect" dst-limit=\
    1/1m,9,dst-address/1m protocol=tcp
add action=add-dst-to-address-list address-list=ftp_blacklist \
    address-list-timeout=3h chain=output content="530 Login incorrect" \
    protocol=tcp
add action=drop chain=input comment="Proteccion VSC contra ataques via SSH" \
    dst-port=22 protocol=tcp src-address-list=ssh_blacklist
add action=add-src-to-address-list address-list=ssh_blacklist \
    address-list-timeout=1w3d chain=input connection-state=new dst-port=22 \
    protocol=tcp src-address-list=ssh_stage3
add action=add-src-to-address-list address-list=ssh_stage3 \
    address-list-timeout=1m chain=input connection-state=new dst-port=22 \
    protocol=tcp src-address-list=ssh_stage2
add action=add-src-to-address-list address-list=ssh_stage2 \
    address-list-timeout=1m chain=input connection-state=new dst-port=22 \
    protocol=tcp src-address-list=ssh_stage1
add action=add-src-to-address-list address-list=ssh_stage1 \
    address-list-timeout=1m chain=input connection-state=new dst-port=22 \
    protocol=tcp
add action=accept chain=input dst-port=22 in-interface=bridge1 protocol=tcp
add action=drop chain=input disabled=yes protocol=icmp
add action=accept chain=input disabled=yes dst-port=1723 protocol=tcp
add action=drop chain=input disabled=yes src-address=201.102.85.5
add action=drop chain=forward disabled=yes src-address=201.102.85.5
add action=drop chain=input comment="BLOQUEO DNS CACHE EXTERNO" dst-port=53 \
    in-interface=ether1 protocol=udp
add action=drop chain=input comment="BLOQUEO DNS CACHE EXTERNO" dst-port=53 \
    in-interface=ether2 protocol=udp
add action=drop chain=output disabled=yes dst-address=1.1.1.1
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="Port scanners to list" \
    protocol=tcp psd=21,3s,3,1
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="NMAP FIN Stealth scan" \
    protocol=tcp tcp-flags=fin,!syn,!rst,!psh,!ack,!urg
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="SYN/FIN scan" protocol=tcp \
    tcp-flags=fin,syn
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="SYN/RST scan" protocol=tcp \
    tcp-flags=syn,rst
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="FIN/PSH/URG scan" protocol=\
    tcp tcp-flags=fin,psh,urg,!syn,!rst,!ack
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="ALL/ALL scan" protocol=tcp \
    tcp-flags=fin,syn,rst,psh,ack,urg
add action=add-src-to-address-list address-list="port scanners" \
    address-list-timeout=2w chain=input comment="NMAP NULL scan" protocol=tcp \
    tcp-flags=!fin,!syn,!rst,!psh,!ack,!urg
add action=drop chain=input comment="Dropping port scanners" \
    src-address-list="port scanners"
/ip firewall nat
add action=masquerade chain=srcnat comment="NAT to Internet" out-interface=\
    ether1
add action=masquerade chain=srcnat comment="NAT to Internet" out-interface=\
    ether2
add action=masquerade chain=srcnat comment=\
    "Hairpin NAT (Ip publica dentro de la RED LAN)" dst-address=\
    !192.168.0.222 src-address=192.168.0.0/22
/ip route
add check-gateway=ping distance=1 gateway=1.1.1.1
/ip service
set telnet disabled=yes
set www address=192.168.0.0/24
set ssh disabled=yes
/ip upnp interfaces
add interface=bridge1 type=internal
add interface=ether1 type=external
/lcd interface pages
set 0 interfaces="sfp1,ether1,ether2,ether3,ether4,ether5,ether6,ether7,ether8\
    ,ether9,ether10"
/ppp profile
add change-tcp-mss=yes dns-server=8.8.8.8,8.8.4.4 local-address=192.168.0.222 \
    name="Profile VPN SG" only-one=yes remote-address=*2 use-compression=no \
    use-encryption=yes
set *FFFFFFFE dns-server=8.8.8.8,8.8.4.4 local-address=192.168.0.222 \
    only-one=yes remote-address=*2
/snmp
set enabled=yes
/system clock
set time-zone-autodetect=no time-zone-name=America/Argentina/Salta
/system clock manual
set time-zone=-03:00
/system identity
set name="MikroTik RB2011UiAS"
/system lcd
set contrast=0 enabled=no port=parallel type=24x4
/system lcd page
set time disabled=yes display-time=5s
set resources disabled=yes display-time=5s
set uptime disabled=yes display-time=5s
set packets disabled=yes display-time=5s
set bits disabled=yes display-time=5s
set version disabled=yes display-time=5s
set identity disabled=yes display-time=5s
set bridge1 disabled=yes display-time=5s
set wlan1 disabled=yes display-time=5s
set sfp1 disabled=yes display-time=5s
set ether1 disabled=yes display-time=5s
set ether2 disabled=yes display-time=5s
set ether3 disabled=yes display-time=5s
set ether4 disabled=yes display-time=5s
set ether5 disabled=yes display-time=5s
set ether6 disabled=yes display-time=5s
set ether7 disabled=yes display-time=5s
set ether8 disabled=yes display-time=5s
set ether9 disabled=yes display-time=5s
set ether10 disabled=yes display-time=5s
set <pptp-ivelez> disabled=yes display-time=5s
/system logging
add topics=debug,pptp,radius
add action=disk topics=info
add topics=error
add topics=route
/system ntp client
set enabled=yes primary-ntp=66.60.22.202 secondary-ntp=200.160.7.186

Any help is welcome. I already tried to create the netmaps from the mikrotik firewall but it didn't work either.

Thank you all in advance and have a great day!
 
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Buckeye
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Re: Problems with printer on lan

Fri May 05, 2023 12:10 am

I have a printer with fixed IP 192.168.0.116 Subnet mask 255.255.252.0 and the gateway: 192.168.0.222.
Are you 100% sure the netmask on the printer is /22 (255.255.252.0) and not /24 (255.255.255.0)? Because if it was /24, I can see why you would be seeing the symptoms you describe.

If you ping the printer from a device with ip address in 192.168.0.0/24 is the TTL the same as if you ping from a device with ip address in 192.168.3.0/24? If the 192.168.3.x address results in a higher lower TTL, then the response from the printer is being redirected to the laptop by the MikroTik (default gateway) for the printer.

What kind of printer is it? Does it have an IP server built in, or are you using some sort of a print server? Maybe it has a brain dead ip implementation with its "management" hard coded to use only /24 as the netmask.
printer netmask.png
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Last edited by Buckeye on Fri May 05, 2023 1:18 am, edited 1 time in total.
 
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anav
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Re: Problems with printer on lan

Fri May 05, 2023 12:31 am

Also check that the Gateway IP address of the printer is correct............ if wrong devices in same network will still find it but others in a different subnet not so much.
 
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Ca6ko
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Re: Problems with printer on lan

Fri May 05, 2023 11:04 am

Unifi transparent bridge mode enabled?
Try on a computer with a static IP address to change it to an address from the DHCP pool. If it works, the problem is with Unifi if not, the problem is with the printer.
 
cavher
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Re: Problems with printer on lan

Fri May 05, 2023 11:24 pm

I have a printer with fixed IP 192.168.0.116 Subnet mask 255.255.252.0 and the gateway: 192.168.0.222.
Are you 100% sure the netmask on the printer is /22 (255.255.252.0) and not /24 (255.255.255.0)? Because if it was /24, I can see why you would be seeing the symptoms you describe.

If you ping the printer from a device with ip address in 192.168.0.0/24 is the TTL the same as if you ping from a device with ip address in 192.168.3.0/24? If the 192.168.3.x address results in a higher lower TTL, then the response from the printer is being redirected to the laptop by the MikroTik (default gateway) for the printer.

What kind of printer is it? Does it have an IP server built in, or are you using some sort of a print server? Maybe it has a brain dead ip implementation with its "management" hard coded to use only /24 as the netmask.

printer netmask.png
Hi Buckeye

the printer is a Konica bizhub C226i via Ethernet, no server printer implemented
network parameters are OK
Image
TTL OK 64 in pc with IP 192.168.0.x and 192.168.3.x
Also check that the Gateway IP address of the printer is correct............ if wrong devices in same network will still find it but others in a different subnet not so much.
Hi! GW its OK!
Unifi transparent bridge mode enabled?
Try on a computer with a static IP address to change it to an address from the DHCP pool. If it works, the problem is with Unifi if not, the problem is with the printer.
HI!

on a notebook via wifi that has dhcp range

I put static ip in the range 192.168.0.x and I could print perfectly.
T_T
 
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Ca6ko
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Re: Problems with printer on lan

Sat May 06, 2023 12:40 am

Now, if one of these notebooks is changed to a Static IP within the 192.168.0.xxx range, everything works fine.
.
on a notebook via wifi that has dhcp range
I put static ip in the range 192.168.0.x and I could print perfectly.
To rule out a wifi problem.
On a computer with a cable connected, set static IP address from the DHCP pool
 
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Buckeye
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Re: Problems with printer on lan

Sat May 06, 2023 12:44 am

I just did a google search using Konica bizhub C226i netmask 255.255.252.0 as the search query. The documentation isn't as clear as it could be, but if I understand it, it seems that the first option, Synchronize IP Address assumes that the netmask is /24 or 255.255.255.0 and only allows access from hosts with the same first 3 octets in the ipv4 address.

I think you should use the Synchronize Subnet Mask

and found this Quick IP Filtering

Here's what it says with my red markings.
Konica Quick IP Filtering.png
This is one reason I hate printers. Every model is different. It isn't quite as bad as it used to be before laser printers and the defacto PCL PJL and Postscript standards. But if you have many printers at branches, it is well worth your time to investigate what is available, and then standardize on as few unique models as possible. It will make your support role much easier.
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Last edited by Buckeye on Sat May 06, 2023 11:12 pm, edited 1 time in total.
 
holvoetn
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Re: Problems with printer on lan

Sat May 06, 2023 2:36 pm

There must be a reason why I avoid Konica printers like the plague ... this could be one of them :lol:
 
cavher
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Re: Problems with printer on lan

Mon May 08, 2023 11:30 pm

Now, if one of these notebooks is changed to a Static IP within the 192.168.0.xxx range, everything works fine.
.
on a notebook via wifi that has dhcp range
I put static ip in the range 192.168.0.x and I could print perfectly.
To rule out a wifi problem.
On a computer with a cable connected, set static IP address from the DHCP pool
Hi.!
In my pc, which is by network cable, I put a static ip inside the DHCP and the printer works perfectly.

I just did a google search using Konica bizhub C226i netmask 255.255.252.0 as the search query. The documentation isn't as clear as it could be, but if I understand it, it seems that the first option, Synchronize IP Address assumes that the netmask is /24 or 255.255.255.0 and only allows access from hosts with the same first 3 octets in the ipv4 address.

I think you should use the Synchronize Subnet Mask

and found this Quick IP Filtering

Here's what it says with my red markings.

Konica Quick IP Filtering.png

This is one reason I hate printers. Every model is different. It isn't quite as bad as it used to be before laser printers and the defacto PCL PJL and Postscript standards. But if you have many printers at branches, it is well worth your time to investigate what is available, and then standardize on as few unique models as possible. It will make your support role much easier.
HI!
I'm discovering that this is happening with all the printers in the office, it doesn't seem to be something particular to each brand.
As I see in the image you pass, literally the same example with the same subnet mask that I have. So it should work, but I still can't figure it out.
 
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Buckeye
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Re: Problems with printer on lan

Tue May 09, 2023 12:29 am

You are going to need to provide more info than you have.

Do you have wireshark installed on your laptop? If not, can you install it?

What type of switch is the 48 port switch? Is it a managed switch with a span (cisco terminology) or mirror port ? That along with wireshark on your laptop connected to the mirror port would allow you to see what is really on the wire, and would give you the needed info to point the finger at the guilty party.

You don't absolutely need the mirror port if you can do the printing from the PC, but having it connected to a span/mirror port will allow you to watch traffic to another device (like the port the printer is connected to).
 
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Buckeye
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Re: Problems with printer on lan

Tue May 09, 2023 12:48 am

In my pc, which is by network cable, I put a static ip inside the DHCP and the printer works perfectly.
What exactly did you do?

What ip address did you set it to?

If you let it get its address via dhcp it should get an address from 192.168.3.x, if you do that does it work?

If if does not, post the output of ipconfig/all from the PC after it gets its ip address from the dhcp server. Hint: to copy from the windows command prompt window, type Ctrl+M then select text, then right-click to copy to clipboard, then paste into </> codeblock here.
 
cavher
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Re: Problems with printer on lan

Tue May 09, 2023 3:32 am

In my pc, which is by network cable, I put a static ip inside the DHCP and the printer works perfectly.
What exactly did you do?

What ip address did you set it to?

If you let it get its address via dhcp it should get an address from 192.168.3.x, if you do that does it work?

If if does not, post the output of ipconfig/all from the PC after it gets its ip address from the dhcp server. Hint: to copy from the windows command prompt window, type Ctrl+M then select text, then right-click to copy to clipboard, then paste into </> codeblock here.
Hi! Buckeye

If I use a PC with Wifi that takes DHCP
It assigns me an IP range 192.168.3.XXX

This way I can ping the printer, but I can't access its WEB configuration and I can't print either.
You are going to need to provide more info than you have.

Do you have wireshark installed on your laptop? If not, can you install it?

What type of switch is the 48 port switch? Is it a managed switch with a span (cisco terminology) or mirror port ? That along with wireshark on your laptop connected to the mirror port would allow you to see what is really on the wire, and would give you the needed info to point the finger at the guilty party.

You don't absolutely need the mirror port if you can do the printing from the PC, but having it connected to a span/mirror port will allow you to watch traffic to another device (like the port the printer is connected to).
It is something I had thought about, but the lack of time at work with other issues has me fatal hahahaha.

Tomorrow I will do that test with Wireshark.
The switch is an unmanaged switch.

My pc is directly to the switch, so with wireshark I hope to have a little more information, but knowing that the other printers also have a problem, makes me think that it is something in the network.
thank you all for your answers. The truth is something that is killing me because I already modified a lot of things but I still can't figure it out.

I will bring you news as soon as possible

Thanks to all of you!
 
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Buckeye
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Re: Problems with printer on lan

Tue May 09, 2023 4:21 am

Please answer these questions:

Does this problem only affect wifi (UniFi) clients? If so, then you should take your problem to the UI community forum.

If you use a wired connection to the switch, and tell your pc not to use wifi, and to obtain an ip address via dhcp, what ip does it get? If appears it should get an address in 192.168.3.0/24. If so, can you reproduce the printing problem using the wired connection?
 
cavher
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Re: Problems with printer on lan

Tue May 09, 2023 5:02 am

Please answer these questions:

Does this problem only affect wifi (UniFi) clients? If so, then you should take your problem to the UI community forum.

If you use a wired connection to the switch, and tell your pc not to use wifi, and to obtain an ip address via dhcp, what ip does it get? If appears it should get an address in 192.168.3.0/24. If so, can you reproduce the printing problem using the wired connection?
Buckeye.

The problem is both Wifi and pc wired directly to the switch.

If I put a PC connected to the switch, it gives me an IP in the range 192.168.3.xxx.

In this way, I also have problems with printers.

In fact momentarily, I moved the printer to the DHCP range. 192.168.3.XXX so that pcs with DHCP can print, but now PCs with static IP can't print haha, it happens to be less damage that way, so we leave it like that momentarily.

EDIT 5/9:

With the Konica bizhub C226i printer, I deactivated the IP filter and it worked.
I have only one printer left, but it is quieter, not so many people use it. This was the most important one and I solved it.

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Thank you all for your help.

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