Packet Captures
Various Pcap files for studies are as follows:
PCAP files
Common packet captures files used across the site and for studies are below:
VPN Captures
| Packet Type | Description | Page Link |
|---|---|---|
| ScreenOS Site to Site VPN | Main Mode VPN negotiations (FW1 is Responder; FW2 is Initiator) | VPN Lab, Debug |
| Dialup VPN | Aggressive mode Dailup VPN | VPN Lab, Debug |
| Aggressive Mode VPN | ||
| Dailup Xauth IP VPN | Aggressive mode Dailup VPN with XAuth IP Assignment | VPN Lab, Debug |
| Dailup Xauth IP VPN | Aggressive mode Dailup VPN with XAuth User login | VPN Lab, Debug |
| NAT Traversal | NAT Traversal on Cisco Routers | VPN Lab, Debug |
| Manual Key VPN | Manual Key or Static VPN captures | Manual Key VPN |
FTP-TFTP
| Packet Type | Description | Page Link |
|---|---|---|
| Active Mode FTP | FTP in Active Mode | Active FTP |
| Passive Mode FTP | FTP in Passive Mode | Passive FTP |
| TFTP RRQ | TFTP Read Request | TFTP |
| TFTP WRQ | TFTP Write Request | TFTP |
Routing Protocols
| Packet Type | Description | Page Link |
|---|---|---|
| BGP | BGP | |
| eBGP | BGP | |
| BGP Notification | BGP | |
| BGP MD5 | BGP | |
| OSPF | OSPF | |
| OSPF MD5 | OSPF | |
| OSPF LSAs | OSPF | |
| OSPF over GRE Tunnel | OSPF | |
| EIGRP Neighbors | EIGRP | |
| EIGRP adjacency | EIGRP | |
| EIGRP goodbye | EIGRP | |
| EIGRPv2 adjacency | EIGRP | |
| RIPv1 | ||
| RIPv2 |
ARP
| Packet Type | Description | Page Link |
|---|---|---|
| ARP | ARP | |
| ARP Storm | ARP | |
| Gratuitous ARP | ARP | |
| Gratuitous ARP HSRP | ARP | |
| RARP Request | ARP |
DNS-DHCP
| Packet Type | Description | Page Link |
|---|---|---|
| DNS Capture | Contains TXT, MX, LOC, PTR, A, AAAA, Any, NS, SRV queries | DNS |
| DHCP | All packets broadcast implementation | DHCP |
| DHCP 2 | Unicast packets implementation | DHCP |
| DHCP Inter VLAN | DHCP | |
| Dhcp-auth | DHCP |
Misc Captures
| Packet Type | Description | Page Link |
|---|---|---|
| TCP SACK | SACK(frame #31), Timestamp | TCP/IP |
| Smtp | ||
| Teardrop | ||
| Telnet | ||
| Port Scan | ||
| Traceroute | Traceroute | |
| Path MTU | Fragmentation Needed message in packet #6 | Path MTU Discovery |
| HTTP | Sack Used | HTTP |
| NAT | Ping Packet with & without NAT | |
| IP Fragmentation | ||
| SNMP | ||
| SIP | ||
| GRE Encapsulated Ping | ||
| RADIUS | ||
| DTP | ||
| Slammer Worm | ||
| GLBP election | ||
| HDLC | ||
| HSRP | ||
| HSRP election | ||
| HSRP failover | ||
| Hsrp-and-ospf-in-LAN | ||
| RADIUS2 | ||
| SSHv2 | ||
| TACACS+ | ||
| Bittorrent | ||
| IPv6 | ||
| Vnc-sample | ||
| Blaster Worm | ||
| OS Fingerprinting | ||
| STP | ||
| MySQL |
Advanced Packet Filtering
Use Case:
I am analyzing an SMB issue. I have 50 PCAP files, each of 100 MB, generated by the intermediate devices. I am not sure which all files contain the interesting traffic. Searching each file manually using wireshark is hectic. Client addresses are 1.1.1.1 and 2.2.2.2. Server address is 3.3.3.3. Protocol is SMB2 (port 445). We can use Tshark or TCPDump for this exercise. Tshakr is slow in Linux & TCPDump is very fast.
Wireshark Filter:
((ip.addr==1.1.1.1 or ip.addr==2.2.2.2) and ip.addr==3.3.3.3) and smb
List all Pcap files using any of the below commands:
find . -type f | egrep "All.pcap" find . -type f | egrep ".pcap" find . -type f | egrep "*.pcap" find . -type f | grep ".pcap" find . -type f | grep "pcap"
List interesting traffic from all the PCAP files:
for i in `find . -type f | egrep "All.pcap"`; do echo $i; tshark -r $i '((ip.addr==1.1.1.1 or ip.addr==2.2.2.2) and ip.addr==3.3.3.3) and smb' ; echo -e "\n"; done
Filter out errors:
for i in `find . -type f | egrep "All.pcap"`; do echo $i; tshark -r $i '((ip.addr==1.1.1.1 or ip.addr==2.2.2.2) and ip.addr==3.3.3.3) and smb2' ; echo -e "\n"; done | grep -E '(error|unknown|denied)'
Filter out errors and save output to text file in backgroup:
for i in `find . -type f | egrep "All.pcap"`; do echo $i; tshark -r $i '((ip.addr==1.1.1.1 or ip.addr==2.2.2.2) and ip.addr==3.3.3.3) and smb2' ; echo -e "\n"; done | grep -E '(error|unknown|denied)' > errors.txt &
Show Timestamps in the output and save it to a text file:
for i in `find . -type f | egrep "All.pcap"`; do echo $i; tshark -t ad -r $i '((ip.addr==1.1.1.1 or ip.addr==2.2.2.2) and ip.addr==3.3.3.3) and smb2' ; echo -e "\n"; done > smb-time.txt a absolute time (local time in your time zone, actual time the packet was captured) ad absolute with date u Absolute UTC time ud Absolute UTC time with date
Search for keyworks in hte text files created along with traces:
for i in `find . -type f | egrep ".txt"`; do echo $i; cat $i ; echo -e "\n"; done | grep smb2.lock
Using TCPDump instead of Tshark
for i in `find . -type f | egrep "All.pcap"`; do echo $i; tcpdump -r $i '((host 1.1.1.1 or host 2.2.2.2) and host 3.3.3.3) and port 445' ; echo -e "\n"; done
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