# Network

## ipset
```bash
# Create ip-list with timeout
ipset create ipl-name hash:ip timeout 3600
```

## iptables
```bash
# Show current rules
iptables -L -vn

# Fix TTL for mobile network
iptables -t mangle -A POSTROUTING -j TTL --ttl-set 65
```

## TC
```bash
#!/bin/bash

	interface=veth0

	interface_limit=100mbit
	 download_limit=40mbit
	   upload_limit=40mbit

	# tc -s -d qdisc show dev veth0

	tc qdisc show dev $interface | grep -q "qdisc pfifo_fast 0"
	[ "$?" -gt "0" ] && tc qdisc del dev $interface root; sleep 1

	tc qdisc add dev $interface root handle 1: htb default 30

	tc class add dev $interface parent 1:  classid 1:1  htb rate $interface_limit burst 15k
	tc class add dev $interface parent 1:1 classid 1:10 htb rate  $download_limit burst 15k
	tc class add dev $interface parent 1:1 classid 1:20 htb rate    $upload_limit burst 15k

	tc qdisc add dev $interface parent 1:10 handle 10: sfq perturb 10
	tc qdisc add dev $interface parent 1:20 handle 20: sfq perturb 10

	tc filter add dev $interface protocol ip parent 1: prio 1 u32 match ip dst 0.0.0.0/0 flowid 1:10
	tc filter add dev $interface protocol ip parent 1: prio 1 u32 match ip src 0.0.0.0/0 flowid 1:20

```