How to increase ping time/network connection latency on Windows?

Posted on


I need to permanently increase network latency in approximately 100ms, without losing packets.

Reason: On a certain server and internet game my ping is too much lower than the other people playing it. I have 15ms, when average is 150ms which gives me cheater-like advantages.

So also out of curiosity I’m looking for ways to increase my ping while keeping connection stable. What are my options if any?

I thought about VPN services, but it seems like a bad option since games use UDP?

Is there any router/software that would assist me on this?

I’m on windows.


You could give dummynet a shot:

Adding Latency

We can con­trol traf­fic by adding rules that match spe­cific packet data, and then send the pack­ets through a Dum­mynet pipe with added delay or packet loss. For exam­ple, we could add a 100 ms delay to all traf­fic head­ing to like so:

$ sudo ipfw pipe 1 config delay 100ms
$ sudo ipfw add 100 pipe 1 ip from any to
00100 pipe 1 ip from any to any dst-ip

The first com­mand here con­fig­ures a Dum­mynet pipe with id 1, cre­at­ing the pipe if it did not already exist. The sec­ond com­mand cre­ates a rule num­bered 100, which matches pack­ets with the desired des­ti­na­tion address and routes them through the pipe. Note that any rule that attempts to pass pack­ets through a non-existant pipe will block traf­fic and throw an error, so do not for­get to con­fig­ure pipes before using them. Using list again allows us to view the updated ruleset.

$ sudo ipfw list
00100 pipe 1 ip from any to
65535 allow ip from any to any

Ping­ing should show a round-trip time of 100 ms plus what­ever the actual cur­rent latency is across the connection.

$ ping
PING ( 56 data bytes
64 bytes from icmp_seq=0 ttl=55 time=117.092 ms
64 bytes from icmp_seq=1 ttl=55 time=124.583 ms
64 bytes from icmp_seq=2 ttl=55 time=117.916 ms
64 bytes from icmp_seq=3 ttl=55 time=121.067 ms

In most cases, we would want to sim­u­late a full duplex con­nec­tion by adding a cor­re­spond­ing rule for pack­ets com­ing from the remote host, so that the delay is applied in both direc­tions. When we are done play­ing with our new rule, we can delete it and the pipe as follows.

$ sudo ipfw delete 100
$ sudo ipfw pipe 1 delete


It looks like the dummynet project includes binaries for Windows. To adapt the commands, it should be enough to simply run the ipfw commands from an elevated command prompt. For example:

ipfw pipe 1 config delay 100ms
ipfw add 100 pipe 1 ip from any to server-ip
ipfw add 101 pipe 1 ip from server-ip to any

I ended up using openvpn. It’s a breeze to use and works pretty good. Pings is stable, no packet loss. The only future problem is the 100mb of traffic limit. I’m not sure how fast I’ll get to that just by playing games.

Leave a Reply

Your email address will not be published. Required fields are marked *