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Geo
Asked: 2018-05-14 10:19:54 +0800 CST

SSH connection between two server after VPC Peering

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I am trying to configure SSH connection between two server on two different VPC on my same account.

VPC1:

vpc-ba8ce8d2
172.31.0.0/16
rtb-576e373f
acl-0dbefa65

VPC2:

vpc-0c5fc020e4f30283d
10.0.0.0/24
rtb-02f581a0a300cb527
acl-03ae3b5c655207

I configured VPN peering and accepted and also modified Route table as follows:

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In Server and VPC acl and security group in Inbound its allowed all traffic from 0.0.0.0/0 Also in Subnet Association added all subnets. (On VPC1 3 subnets and on VPC2 1 subnet).

But Still I cant able to connect SSH.

root@ip-172-31-6-77:~# ip addr | grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP group default qlen 1000
    inet 172.31.6.77/20 brd 172.31.15.255 scope global eth0
root@ip-172-31-6-77:~# telnet 10.0.0.243 22
Trying 10.0.0.243...



root@ip-10-0-0-243:~# ip addr | grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP group default qlen 1000
    inet 10.0.0.243/24 brd 10.0.0.255 scope global eth0
root@ip-10-0-0-243:~# telnet 172.31.6.77 22
Trying 172.31.6.77...

Can anyone please help us. What is missing from my side?

ubuntu

1 Answers

  1. Best Answer

    rtb-02f581a0a300cb527 has 172.16.0.0/16 but the actual CIDR is 172.31.0.0/16 (second octet is 31 not 16)

    fix the destination CIDR to 172.31.0.0/16 in rtb-02f581a0a300cb527, that should resolve the issue.

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