In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.Firewalls are often categorized as either network firewalls or host-based firewalls. Network firewalls filter traffic between two or more networks and run on network hardware. Host-based firewalls run on host computers and control network traffic in and out of those machines.

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  1. ed.j

    Firewall logs

    Where do you see firewall logs? In the log centre? I can't see anything relating to firewall in there, does this mean it has never blocked anything? I got the impression NAS users were constantly under attack from hacking attempts so I feel like I'm missing something. If it's just the hacking...
  2. R

    Firewall Blocks Still Reach Threat Prevention

    I have setup the router's (2600, V1.2.5) firewall to block entire subnets, e.g. -, yet threat IP addresses within this subnet still are dropped by Threat Prevention. I know the firewall is working because I get many hits on the blocked subnet. Is TP before the firewall...
  3. M

    Firewall rules to prevent hacking attempts

    Hi All, I've got a ds218+ setup running Plex/Sab/Sonarr/Radarr in Docker, in the last week I've had someone trying to access DSM using the default admin account. This will not work as the admin account is disabled, however it's annoying as I can see them trying this pretty frequently so I'm...
  4. Jan Janowski

    RT2600ac Firewall vs 2 new rules in SRM 1.3.1-1

    This is more SRM 1.3.1-1 than RT2600ac specific. Something has been bugging me: I use IPV4 settings here. In SRM settings, I have disabled IPV6, and at bottom of firewall list I have the IPV6 rules that don’t match set for deny. Yet in SRM 1.3.1-1, TWO new firewall rules were added: One of...
  5. R

    Do Firewall Rules Prevent IPs from Reaching Threat Prevention?

    If the Firewall has a rule to block an entire IP range, say, will Threat Prevention still react to threat IP in that range or do those IPs blocked at the firewall not reach TP?
  6. F

    SRM Firewall order and deny

    Hi, Question 1 I need to make rules about the access of my smart tv but I have difficulties to know in which order to insert them in the firewall: Source: TV to WAN : Allowed : Svod Source: TV to NAS : Allowed (for plex) Source: TV to LAN: Denied. The kb indicates The SRM firewall applies the...
  7. ChAlb

    Firewall Settings review - SHA Cluster + Remote Access

    Hi All, After reading the advice in the forum from experts about other firewall issues, I wonder if my own firewall rules are finally strict enough in my specific context: Router configuration (ports opened/nated) 443 : forwarded to HA Cluster IP which run Synology HTTP proxy server in front...
  8. Lieven

    Firewall rules are those 2 needed ?

    Hey, those 2 firewall rules are those needed ? And in what situation are those 2 needed ? thx
  9. S

    Firewall settings - are they good?

    Hello, I would like to consult if my firewall settings are okay, and if I understand how firewall works correctly. The goals are: - allow access from my home network and remotely from PC at work - allow access just from my country, to minimize attacks from internet (login attempts, etc.) - allow...
  10. Cyberwasp

    Synology firewall

    Hey guys. awhile ago I had turned off the synology firewall for some reason and haven't been back to it. I'd like to either reastablish it or go with synologies vpn. I know the first thing in firewall is to enable management UI, However when I tried to access it via smb/windows Explore under...
  11. Jan Janowski

    Firewall rule question

    Should a firewall rule: denying ICMP(ping) to the IP your ISP assigned you — your router, work, and log hits? Thank you
  12. Jan Janowski

    Not sure if it's Router, but Suspect ISP (ICMP entry in Firewall)

    RT2600ac Seeing that both Router and ISP have had changes recently.... I'm not exactly sure... but I suspect it's the ISP I had an ICMP Allow rule in Router Firewall to allow ping to ISP Server feeding me for years on my prior ISP... and it logged hits in the Firewall.... Now, with this new...
  13. Sly870

    Suggestions for firewall please

    Hello :) I need some advice please, starting to get a wee bit frustrated with my network setup I run a Fritzbox in the kitchen that is my modem, internet comes in there. I then run a network cable to my loft where I have a little Unifi USG 3port as the router/firewall that then goes into an...
  14. ed.j

    Firewall setup - is this OK?

    I would like to know that my firewall is setup correctly and despite doing lots of reading it's always helpful to have a sense check. I know that the firewall is not entirely necessary if your router has a firewall, which mine does - but I'd still like to make sure because I don't fully trust it...
  15. Jan Janowski

    Questions about firewall rules

    questions.... The top rule in my firewall is a rule where a rage of IP's are ALLOWED access to internet: Soruce IP Range, All SOURCE PORTS, ALL DESTINATION IP, ALL DESTINATION PORTS ALLOW.. For Clairity we'll call it ALLOW INTERNET.. It is the first rule in firewall Rule 2 (We'll...
  16. M

    Firewall geoblocking doesn't work at all, totally stumped.

    Hello all, I'm a long time lurker that recently made an account. I had never needed to before as this site, in conjunction with good Googling, always led me to the right answers. This time, I'm just totally stumped. I have set up my firewall as attached, and this seems to be exactly the same...
  17. Jan Janowski

    Specific Firewall (ICMP) IP Range question

    In a month or so, I will need to increase the amount of ICMP (For Pinging) Router firewall "ALLOW" Rules from 1 (Which is working fine now) to 6.... 3 of IP's are scattered in 149 IP area, other 3 scattered across 72 IP area.... My Question: In the Router Firewall ICMP rules, can I mix and...
  18. K

    Questions regarding firewall

    First off I'll say that I am a complete muggle when it comes to network security. Now in my middle years I'm trying to learn about it, so please bear with my ignorance. I just set up a synology as a plex server, home cloud for my family and computer backup. Things went well though I had to...
  19. Jan Janowski

    Another Question on the Firewall Rule automatically deployed when firewall is enabled on NAS

    So this is the rule that was entered automatically when I enabled firewall on my 720+... Up till now I've never really looked at it.... Now that I have, I see programs indicated that I'm not using.... I use DS FILE, DS CAM, and DRIVE on phones.... (Remote connect via QC address-No Ports...
  20. S

    Firewall blocking SMB and network discovery?

    Is it possible to get network discover and SMB to work alongside an active firewall on my DS220+? I have enabled SMB and Network Discovery on the DS itself, along with opening the firewall ports for SMB and AFS. Nothin' still doesn't work, unless I completely disable to firewall...