We used to connect to FTP server( client's other server) from our AWS (ubuntu) instance. But all of a sudden we are unable to access that ftp server from our AWS instance. There is no credentials issue as i am able to login into that ftp server from my laptop and from other aws instance. I spoke to client team they have not blocked our ip on there side. I tried adding inbound and outbound rules for specific ip and 20/21 ports also but it did not help. Can someone help me which tool / command will help me to debug this issue. Or how can i find out where the request is getting blocked on aws network / client network / my aws instance
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