AC87U Dropping lots of packets > 23,000/hour

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New Around Here
Hello everyone. I set up a network intensive application on my home network and now I'm seeing lots of packets getting dropped in my router logs. I opened port 30306 on my router using the port forwarding settings so that my local machine to connect directly to others. I had it originally setup to connect to 25 peers and the router was rebooting a few times a day. I lowered it to 10 which so far seems to be OK. I'm connected to 10 and software is operating. But it is operating slow and falling behind on the network. I'm assuming that's because all the dropped packets. All of the dropped packets were intended for my application running on port 30306.

I have a strong understanding of linux but limited network specific knowledge. I don't know where to start to resolve this. Any suggestions? If you are interested in the use case, the software is an ethereum network node.

The router is running AsusWRT

More details:
I verified that the router is not hitting memory issues or cpu limitations.
Here is are two common examples of the log for the dropped packets:
Sep 27 11:27:44 kernel: DROP IN=eth0 OUT=br0 SRC= DST= LEN=52 TOS=0x00 PREC=0x00 TTL=117 ID=1489 DF PROTO=TCP SPT=49805 DPT=30306 SEQ=2774348556 ACK=0 WINDOW=8192 RES=0x00 SYN URGP=0 OPT (0204058A0103030801010402)
Sep 27 11:27:44 kernel: DROP IN=eth0 OUT=br0 SRC= DST= LEN=60 TOS=0x00 PREC=0x00 TTL=52 ID=62983 DF PROTO=TCP SPT=45406 DPT=30306 SEQ=1977573215 ACK=0 WINDOW=29200 RES=0x00 SYN URGP=0 OPT (020405480402080A08D0B0400000000001030307) MARK=0x80c00000
Last edited:


New Around Here
This was due to the ASUS router built in DOS protection. I turned off DOS protection and now everything is as expected.

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