Pfsense dropping packets

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Thread starter colinstu Start date Aug 18, Joined Oct 11, Messages 3, Check out these RRD graphs. Last edited: Aug 18, BigBadAl Limp Gawd.

Joined Sep 16, Messages Or just straight out swap them both for a couple of Intels. Joined Jul 11, Messages 9, Joined May 18, Messages I was going to say to check the NICs.

That is most likely your problem. Joined Aug 18, Messages 1, How does your internet work during those time periods?

Since it is on your WAN port that most likely means your connection is having issues during those times. What PFsense is doing is pinging the gateway device from time warner.

It's giving you an idea of the quality of the connection back to your ISP. You probably want to look at your modem and see the signal levels. Downstream signal to noise ratio should be above 32dB. If you look at the graph for LAN and see packet loss then you definitely have an issue with particular nic, but it most likely works fine as well. TCM2 Gawd. Joined Oct 17, Messages Network your employees, partners, customers, and other parties to share resources in site-to-cloud, cloud-to-cloud, and virtual private cloud VPC connectivity.

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pfsense dropping packets

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The curriculum is designed to scale in detail from new pfSense users to senior network engineers, and can be customized to suit the needs of your business. Protected with Snort. Has been stable for months. Best open source firewall ever pfsense. That is all. Our Products. Get Support.Asymmetric routing happens when traffic between two nodes takes a different path in each direction e.

Client sends its ACK and further responses back by its other gateway that are not seen by pfSense software. After 30 seconds, pfSense software removes its state table entry as the connection was never completed as observed by pfSense software.

Since this packet is not starting a new connection, the packet is dropped, and the client gets disconnected since it now has no way to reach the destination.

The same rules may be created manually by adding one on the affected interface tab e. LANand a second rule on the Floating tab using the same interface LAN again to match the traffic in the out direction. On occasion these issues can be caused by other factors that lead to asymmetric routing, such as issues with route-to or reply-toboth having to do with gateways on interface settings.

If a gateway is set on an internal interface, such as LAN, it can cause problematic behavior. For WANs this is typically a good thing! For LANs it is not. Among other ill effects, it can lead to a loop of sorts where packets bounce between the firewall and the defined gateway, eventually being blocked or dropped when their TTL expires.

pfsense dropping packets

In these cases the reply-to and route-to behavior is desired and likely required. If it is missing the packets may be blocked or dropped as they attempt to leave the wrong interface. A packet could enter via the alternate WAN, but the reply would leave by the default gateway. Netgate Logo Netgate Docs.Your browser does not seem to support JavaScript.

As a result, your viewing experience will be diminished, and you may not be able to execute some actions. Please download a browser that supports JavaScript, or enable it if it's disabled i. Question - mostly out of curiosity. When I set a queue length i. When I do not set a queue length it looks like PFSense defaults the queue length to When the link is fully saturated I still see no dropped packets, but I do see the queue length increase.

I thought the whole idea of traffic shaping is to drop packets. Can anyone explain this behavior? The point of TS isn't to drop packets, it's to control your connection and maintain specified service levels. Dropping packets is one method of doing that, as is limiting the outgoing data rate.

If you queue gets too long, you get buffer bloat, which is completely separate of traffic shaping. If your queue is too small, you get packet-loss and lower throughput. One of the bigger issues with sizing your queue is that most queues are based on the number of packets, long the actual amount of data in the queue.

A queue of can hold 32, bytes of 64byte packets orbytes of byte packets. That is a large difference in the number of bytes. I use an arbitrarily large queue depth with Codel, likebecause it already fights buffer bloat. My understanding of this area is foggy too. If a stream is being precisely controlled, then there should be practically no queue. A queue appears when numerous streams collide and someone needs to make a decision about who waits and for how long. Drops can happen regardless of queue size I thinksince this is how TCP throttles a stream.

Drops must happen if a queue is at it's limit. UDP is also an area of confusion for me. Yes, there are queues the user creates, but where are the stats for the arbitrary FIFO queues that these algorithms create for each and every connection? I have seen confusing drop-rates too. I just assumed I was not seeing the whole picture. This stuff is hard to comprehend when only understanding bits and pieces.

Modern TCP does not need drops, but drops do cause it to back-off very quickly. UDP is only just a way to immediately send a packet when the application attempts to send it.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. On pfense you can implement this easily via rules. Create a firewall rule and assign a gateway on the advanced tab of the rule options.

PBR is simplier to accomplish, but it's harder to understand and control since it's more atomic and multiple FIBS require kernel tampering, which by itself if more difficult, but the final implementation is way simplier to handle and to undertstand. Iadvise using last approach. Sign up to join this community. The best answers are voted up and rise to the top.

pfsense dropping packets

Home Questions Tags Users Unanswered. Asked 4 years, 1 month ago. Active 4 years, 1 month ago. Viewed 4k times. Is it possible? What's the option I should be looking into to do this? Active Oldest Votes. Daniel Nachtrub Daniel Nachtrub 6 6 silver badges 12 12 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

The Overflow Blog. The Overflow How many jobs can be done at home? Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Related 3. Hot Network Questions. Question feed. Server Fault works best with JavaScript enabled.I have ESXi 5. While doing some experiments with "esxtop" lately, I noticed that "certain types" of traffic show a high amount of allegedly dropped packets in the network screen. So it doesn't seem to be caused by a recent ESXi version or the exact hardware.

And it only occurs for packets coming in to the router, not for those going out. No or very little dropping occurs when I do UDP transfer tests or have small-packet traffic like audio streaming. I can transfer e. Is this just cosmetic, or might this be an actual indication of a problem? Note that this probably occurred for the past 2. Might this even be in some way related to this issue: Issue with ESXi 5.

I suspect this is to do with the processing power of your VM, If you have only 1 vCPU configured then is your bottle neck, increase the vCPU and check again to see if you are still dropping traffic. You can see traffic dropped on esxtop. That's the odd thing here.

Intro to Packet Analysis on pfSense

I don't see why it should drop SO many packets with downloads, and not with other traffic of the same magnitude. That is quite interesting, how are monitoring traffic drop? Sounds like pFsense is misbehaving. Sorry, I don't really understand the question "how are monitoring traffic drop", could you maybe re-phrase that?

I created packet captures of the transfer, directly on pfSense on the "LAN" interface to which the VMs are connected and at home.

There was nothing like that, only the to-be-expected occasional selective retransmit of packets that get lost due to TCP's behavior when you download from a fast server over a slow home connection. Also, this behavior was, as my tests showed, quite probably present for over 2 years, and I never noticed any negative effect in terms of transfer speed problems.

I just never took a look at the network page of esxtop before, so I never noticed it. So yeah, it is very odd. Maybe version 5. There was a typo there I mean, How are you monitoring the traffic dropping? Were you looking at pFsense or at the hypervisor level using esxtop; but you seem to be on the right tracks, last time I was test pfsense I have seen similar issues and this was insufficient cpu processing power, increasing vCPU did the trick.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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On pfense you can implement this easily via rules. Create a firewall rule and assign a gateway on the advanced tab of the rule options. PBR is simplier to accomplish, but it's harder to understand and control since it's more atomic and multiple FIBS require kernel tampering, which by itself if more difficult, but the final implementation is way simplier to handle and to undertstand.

Iadvise using last approach. Sign up to join this community. The best answers are voted up and rise to the top.

intermittent packet loss with pfsense?

Home Questions Tags Users Unanswered. Asked 4 years, 1 month ago. Active 4 years, 1 month ago. Viewed 4k times. Is it possible? What's the option I should be looking into to do this? Active Oldest Votes. Daniel Nachtrub Daniel Nachtrub 6 6 silver badges 12 12 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.

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