Issues
Network
MGMT slow
Slow access to HOME from laptop on MGMT wi-fi.
UPDATE: 2023-10-28
Looks like laptop gets very low Rx rate (throughput from haru to Morgana) of ~17Mbit or even 6Mbit:
iperf3 -c 192.168.100.20 -p 2345 -R -t 9999
Connecting to host 192.168.100.20, port 2345
Reverse mode, remote host 192.168.100.20 is sending
[ 5] local 192.168.100.161 port 42966 connected to 192.168.100.20 port 2345
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 1.75 MBytes 14.7 Mbits/sec
[ 5] 1.00-2.00 sec 1.64 MBytes 13.8 Mbits/sec
[ 5] 2.00-3.00 sec 1.64 MBytes 13.8 Mbits/sec
[ 5] 3.00-4.00 sec 1.55 MBytes 13.0 Mbits/sec
[ 5] 4.00-5.00 sec 1.62 MBytes 13.6 Mbits/sec
[ 5] 5.00-6.00 sec 1.63 MBytes 13.6 Mbits/sec
^C[ 5] 6.00-6.14 sec 252 KBytes 14.4 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-6.14 sec 0.00 Bytes 0.00 bits/sec sender
[ 5] 0.00-6.14 sec 10.1 MBytes 13.8 Mbits/sec receiver
At the same time I get like 60Mbit sending data out:
iperf3 -c 192.168.100.20 -p 2345 -t 9999
Connecting to host 192.168.100.20, port 2345
[ 5] local 192.168.100.161 port 45200 connected to 192.168.100.20 port 2345
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 10.1 MBytes 85.0 Mbits/sec 0 469 KBytes
[ 5] 1.00-2.00 sec 6.71 MBytes 56.3 Mbits/sec 0 469 KBytes
[ 5] 2.00-3.00 sec 7.08 MBytes 59.4 Mbits/sec 0 502 KBytes
[ 5] 3.00-4.00 sec 6.40 MBytes 53.7 Mbits/sec 0 529 KBytes
[ 5] 4.00-5.00 sec 7.77 MBytes 65.2 Mbits/sec 0 529 KBytes
[ 5] 5.00-6.00 sec 7.77 MBytes 65.2 Mbits/sec 0 529 KBytes
[ 5] 6.00-7.00 sec 7.01 MBytes 58.8 Mbits/sec 0 587 KBytes
[ 5] 7.00-8.00 sec 8.47 MBytes 71.0 Mbits/sec 0 621 KBytes
^C[ 5] 8.00-8.40 sec 2.41 MBytes 50.4 Mbits/sec 0 621 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-8.40 sec 63.8 MBytes 63.7 Mbits/sec 0 sender
[ 5] 0.00-8.40 sec 0.00 Bytes 0.00 bits/sec receiverHaru reports low MCS values of 10 or lower.
VPN clients coming from outside are NAT'ed
They will looks like justine, not their actual VPN IP, since devices can use caroline as their default G/W.
No access to SERVER VLAN from HOME with justine G/W
VPN clients can access justine MGMT interface IP
11:06:10.811023 vpn In IP 172.17.1.10 > 192.168.100.2: ICMP echo request, id 44951, seq 814, length 64
11:06:10.811041 vpn Out IP 192.168.100.2 > 172.17.1.10: ICMP echo reply, id 44951, seq 814, length 64I have set up more strict forwarding rules:
Chain FORWARD (policy DROP 52 packets, 4368 bytes)
num pkts bytes target prot opt in out source destination
9 35 5441 ACCEPT all -- enp1s0 vpn 192.168.0.0/24 0.0.0.0/0
10 32 5244 ACCEPT all -- vpn enp1s0 0.0.0.0/0 192.168.0.0/24but this does not help.
This is because it is not going through FORWARD but through INPUT:
iptables -A INPUT -i vpn -d 192.168.100.0/24 -j LOG[604557.640819] IN=vpn OUT= MAC= SRC=172.17.1.10 DST=192.168.100.2 LEN=84 TOS=0x00 PREC=0x00 TTL=64 ID=56812 DF PROTO=ICMP TYPE=8 CODE=0 ID=44951 SEQ=1064Adding the above rule will block it. But is this normal that any IP assigned to any interface can be used when routing to a G/W?
FIXED: I have added the following rule:
iptables -A INPUT ! -i mgmt -d 192.168.100.0/24 -j DROPFOLLOWUP: Is this the same for other devices? Try static route to them and access MGMT IP.
ip route add 192.168.100.50 via 192.168.0.50 dev wlan0And it will ping on 192.168.100.50. So services bound only to 192.168.100.50 will be exposed to HOME VLAN devices.
CONCLUSION: Binding to selected IP address does not protect service from being accessed from another network interface without extra firewall rule to prevent this!
What makes localhost (lo) interface special - services bound to it are not accessible from other interfaces? It has local routing tables set up by default.
Same problem for caroline
Same with caroline:
ip route add 192.168.100.1 via 192.168.0.1 dev wlan0I can now access https://192.168.100.1/cgi-bin/luci/ while on HOME VLAN, probably will work form SERVER and any other as well!
FIXED: DROP all INPUT on all interfaces apart from MGMT. Added ACCEPT rules for LAN, GUEST and SERVER VLANs for DHCP (UDP 67), DNS (TCP/UDP: 53) and ICMP.
I could not use the negative interface setup as in case of justine. Probably should use default INPUT DROP on justine as well and only allow mgmt interface traffic as well.
Would this be same for goro and haru?
They don't have IP on HOME network but they have interface. Injecting packet for MGMT IP to their HOME interface may be (using MAC/ARP) possible but they would not respond since they have no routing to HOME network?
Access to web services from internal network
Need to manually add static route for devices using default DHCP G/W (justine) when going to local server services like video.hexadust.net.
ip route add 46.7.126.16 dev eth0 via 192.168.0.1
ping video.hexadust.netThings to try:
- Try to push static routes from DHCP - this did not work for some reason
- Set up static route on justine
- Set up SNAT on justnie
- Use bridge layer DNAT: https://ebtables.netfilter.org/br_fw_ia/br_fw_ia.html
- Set up split DNS
video.hexadust.net 192.168.50.159- This would require justine to forward to SERVER VLAN since ann uses 0.2 as default G/W
- Set up separate DNS for internal access
No more IPs on DHCP
Looks like Horizon box eats up leases: https://www.boards.ie/discussion/2057720465/my-new-virgin-media-stb-issued-two-lan-i-ps
I have removed leases from /var/lib/dhcp.lease file on caroline.
Justine access is laggy; DNS is slow
Happens after OpenWRT updates.
Try disconnecting and connecting network cables for Haru and uplink on goro.
Igor does not set it's default route after boot
While it is configured in web UI it is not taking effect on boot and results in it unable to find local network. VMs stuff will work OK though.