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. 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
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. Jan Janowski

    Firewall rule question

    Regarding RT2600ac firewall: Say the rule I want to make involves allowing (or denying) IP of, and Wan IP of (for this discussion). My question is: do I need to make 1 or 2 rules to cover both inbound and outbound directions? One to to cover outbound...
  12. M

    Synology Assistant is being blocked by the firewall. How do you configure the firewall to allow

    I had to reinstall windows and all app software. Synology Assistant cannot find my NAS. When I turn off the firewall Synology Assistant works fine. I cannot find a setting to configure the firewall to allow the Synology Assistant to work. Any ideas? Win 10 Latest and greatest version. NAS...
  13. Jan Janowski

    TP, Firewall, or _______?

    Been considering posting this for a while now. RT2600ac, Latest firmware, with TP and firewall running. When I go into TP/Statistics, I see probes from China. TP blocks them. Good. When I go into Firewall, I see all probes from China IP are blocked, and hits indicating it happened, yet in TP it...
  14. P

    Do I need to enable firewall on DSM 7?

    We have punched holes in our Sonicwall NSA to connect with a remote NAS for 1. Shared Drive Sync 2. Remote Snapshot Replication Ports open are 5000 5001 5566 6690 From many articles they say its best to enable the firewall on the Synology NAS. If I do enable them, 1. Do I need to create...
  15. Jan Janowski

    Use of Regional blocks in firewall-- For example Block USA

    At various locations, I've read that Blocking USA in Firewall of NAS will cause problems.... I had blocked USA to see what would happen.... Nothing -- I seem to be able to do everything I could before I turned the block on! However -- I did recently find out that a USA Block in NAS Firewall...
  16. Sjeph

    DSM 7.0 Firewall rule disabled after active connection to app and hyperbackup

    Hey all, I am posting this thread here because it is a complication from several apps that makes this occur: I recently upgrade to DSM 7 on my DS916+ and find myself now with a problem with existing hyperback jobs, while I didn't have this behavior prior to DSM 7. When I use the AudioStation...
  17. U

    Geo Block Firewall Settings - help!

    Hello - I have a DS415+ - latest - DSM 6.2.4-25556 - everything up to date. I've been getting login attempts on my mail (plus) server. They appear to be coming from Bulgaria according to WHOIS - a traceroute leaves me hanging somewhere around Amsterdam. My Configuration: *...
  18. lukasberan

    Firewall rules per package

    Hi. On my DS218 with DSM 7, I have multiple packages and want to have different firewall rules for each of them, because some services will be available world-wide, some of them just from my country and some of them will be just internal. Synology Drive should be available publicly with no...
  19. DaVoodoo

    Docker Sonarr & Docker Radarr issue with Firewall.

    I have Sonarr & Radarr dockers working 100% and they can reach the indexers fine. As soon as I turn on Synology Firewall (Attached is a screenshot of Firewall.) the indexers are blocked: All indexers are unavailable due to failures, All search-capable indexers are temporarily unavailable due...
  20. wizard99

    Firewall Exception to Eliminate "User Privilege Gain" Alerts from VoIP

    I've enacted all the Security recommendations both from the Advisor and from general good practices for the 2600, and have been trying to eliminate as many False Alerts as possible being sent to my In Box. I found my ObI VOIP was the source of Alerts every time I picked up the phone. I...