linux_custom_route

gistfile1

#ip ro list table isp2
 default via 10.64.64.64 dev ppp0  src 10.68.56.108

#ip ru
0:      from all lookup local 
32765:  from all fwmark 0x2 lookup isp2 
32766:  from all lookup main 
32767:  from all lookup default 

#iptables -L -t mangle
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
TCPMSS     tcp  --  anywhere             anywhere             tcpflags: SYN,RST/SYN tcpmss match 1400:65495 TCPMSS clamp to PMTU

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
MARK       tcp  --  anywhere             anywhere             tcp dpt:2212 MARK set 0x2

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

#tcpdump -n -i ppp0
09:54:54.681759 IP 19.11.20.20.40782 > xx.xx.xx.xx.2212: Flags [S], seq 2277389391, win 14600, options [mss 1460,sackOK,TS val 15361058 ecr 0,nop,wscale 4], length 0


 iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
 ip rule add fwmark 2 lookup isp2
 iptables -t mangle -A OUTPUT -p tcp --dport 2212 -j MARK --set-mark 2
  iptables -t mangle -A OUTPUT -d cloud.sipay.ru -j MARK --set-mark 2